UDK ; Some Features of Sintering of Tungsten Powders
|
|
- Jerome Singleton
- 6 years ago
- Views:
Transcription
1 Science of Sintering, 48 (2016) UDK ; Some Features of Sintering of Tungsten Powders doi: /SOS A Igor Viktorovich Andreiev, Volodymyr Petrovych Bondarenko, Lubov Georgyivna Tarasenko Bakul Institute for Superhard Materials NAS of Ukraine, Kyiv 04074, St. Avtozavodska, 2, Ukraine Abstract: A method of activating the sintering process for tungsten powders using a closed reaction space and hydrogen, steam-saturated water was observed. This sintering process is allowed to activate super coarse-grained (1000 µm) tungsten powder sat relatively low temperatures ( C). Keywords: Tungsten, Sintering. 1. Introduction Tungsten and its alloys because of their unique characteristics have wide application in many sectors of the industrial production [1-3]. One of the topical applications of tungsten materials is the thermonuclear energy, where tungsten can be used for protection against plasma of parts of the first wall and the diverter [4, 5], because of its operational strength to 20 times higher than the resistance of iron, copper, beryllium and 10 times-molybdenum. The most important is creation of porous tungsten materials, through which molten lithium must be delivered to the work surface. While tungsten is highly Refractory metal, sintering of porous products has some difficulties: the need to achieve temperatures of melting point, applying a protective environment (vacuum or inert gas), using of special equipment. So the current problem is to find methods to simplify the process of sintering. One way to do this is activated sintering of powder tungsten products with alloying additives, which enter stored by deposition on the tungsten particles surface layer of metal salts (nickel) in the evaporation of the solvent from a liquid solution of metal salts or metal layer by electrolysis [6-8]. In the paper [9] an attempt was made to activate the sintering of tungsten with using as an activator of tungsten nanopowder. Applying the methods described in [6-9], made possible to reduce sintering temperature of tungsten up to melting point. However, the disadvantage of these methods was using of additional materials for activation of sintering process. This makes impossible to have a clean, without impurities, tungsten materials. In the works [10-12] there are the results of research of super coarse-grained tungsten powders producing with particle sizes up to 1000 microns, which can be used as starting components to produce products with a given porosity. It should also be noted that studies on activation of the sintering process carried out on samples manufactured from tungsten powder with particle sizes up to 1 micron. However, the results of studies on sintering activation for more coarse-grained powders of tungsten in the literature are not given. *) Corresponding author: aigor@i.ua
2 192 I.V. Andreiev et al. /Science of Sintering, 48 (2016) To intensify the growth of particles of tungsten powders in the works [10-12] was applied the technique of closed reactor space, providing hydrogen gas environment, saturated with water vapours, which are formed due to reduction of oxygen-containing compounds of tungsten, with strong growth in the tungsten particles [1, 11]. Using of a closed reactor space with high humidity gas environment during sintering of porous tungsten materials can be helpful to activate the process of sintering of pure, without any addition, tungsten powders of different grain sizes. 2. Experimental Studies The purpose of this work is to determine the impact of gas environment on the sintering behaviour of large (up to 1000 microns) particles of tungsten using as an activator of sintering the hydrogen gas environment with high content of water vapour. Tungsten powders, obtained in a closed reactor, were divided into fractions 3-5, 5-100, , , and µm. Samples with a diameter of 9 mm and a height of 9 mm (fig. 1) were pressed. The powders were previously handled by the softener to improve compressibility. Preparation of basic powders to form (granulation) and pressing were done on common in powder metallurgy technique. Sintering was done in hydrogen environment at a temperature of 1200 c in the classic running system and in a closed reactor [10]. During sintering in a closed reactor, after removal plasticizer from the samples, water was introduced to create water steam-hydrogen gas environment. After sintering microstructure of these samples was studied by using raster electronic microscope ZEISS EVO 50XVP and compressive strength was determined on a test machine. Speed of loading of sintered samples in these tests was 1 mm/min. Fig. 1. Pressed samples of tungsten powders of different grain patterns: μm, μm, μm, µm, μm, μm. 3. Results and Discussion The results of the experiment are presented in fig. 2. Particle size of tungsten, used in the experiment, increases from left to right and is listed above. a
3 I.V. Andreiev et al./science of Sintering, 48 (2016) b Fig. 2. Samples sintered in the flowing (and) and closed (b) reactor. From fig. 2, a it can be seen that the most super coarse-grained molded samples with particle sizes of tungsten more than 300 microns after removal of the plasticizer in the flowing reactor did not retain its shape and collapsed. The using of hydrogen gas environment, saturated steam water in a closed reactor (fig. 2, b), allowed to sinter samples even from tungsten particles with sizes up to 1000 microns. The effect is caused by activation of redox process and the formation of gaseous tungsten-contained connections WO 2 (OH) 2 [1] in gas environment during the process of sintering, due to the partial oxidation of the surface of the particles of tungsten with subsequent formation of hydroxyl WO 2 (OH) 2 in reactions: W+3Н 2 О WO 3 +3Н 2 ; (1) WO 3 +Н 2 О WO 2 (ОН) 2. (2) Partial pressureof WO 2 (OH) 2 on tungsten particles will be higher than in their contacts. As a result WO 2 (OH) 2 will diffuse into the particle tungsten contacts, creating around them pressure WO 2 (OH) 2 more equilibrium. Excess WO 2 (OH) 2 will be reduced by hydrogen after the reaction: WO 2 (ОН) 2 +3Н 2 W+4Н 2 О. (3) Tungsten, formed after reduction of WO 2 (OH) 2 in reaction (3), will condense in places of contact of source particles of tungsten, fastening them. Above-described processes of oxidation-reduction should go more actively in the samples with small particles of tungsten, if at the same time, as the "inhibitory" process, does not manifest deterioration of permeability during sintering. From fig. 2, b can see on the samples sintered with the use of a closed space, that the effect of the "inhibition" of access of hydroxyl WO 2 (OH) 2 to the internal volume of the samples does not appear because there has been no deterioration in the sintering process of samples with the decrease of the original tungsten particles from which the samples were formed. On the contrary, the state of the sintered samples with the decrease of the original particles is improving, as evidenced by the fixed linear shrinkage formolded samples of tungsten powders with particle sizes 3-5 µm sintered in the closed reactor space. The shrinkage was 8%. Also effect of hydrogen gas environment, saturated with water vapor, in the process of sintering of tungsten powdersclearly manifestedin the microstructure of sintered samples (fig. 3). So in fig. 3 can see that in case of using a closed reactor space the processes, associated with the effect of migrating tungsten-contained substances via the gas phase, are activated. That contributes to the process of sintering even large particles of tungsten, despite a very small number of specific surface of powder. Although, judging from fig. 3, e, f there is no formation of contacts between the most coarse particles of tungsten, their presence shows the fig. 1, b. From fig 1, b, can see that after sintering of samples in the closed reaction space with hydrogen gas environment, saturated with water vapor, the existence of contacts between particles is indirectly confirmed by retention of the geometrical shape of sintered samples. Test of sintered samples of tungsten materials in compression showed promising of
4 194 I.V. Andreiev et al. /Science of Sintering, 48 (2016) using closed reactor for sintering of porous tungsten materials (Tab. I). a) b) c) d) e) f) Fig. 3. Images of microstructures of sintered samples of varying grain size: 3-5 µm (a, b), µm (c, d), μm (e, f). Flow-through reactor (a, c, e), closed reactor (b, d, f). As can be seen from the data, the tungsten material sintered in closed space reactor at a temperature of 1200 Chas value of compressive strength R cm more than in 2 times more than values of this characteristic in samples from powders W the same fraction, sintered in the flowing reactor. It should also be noted that in our studies we did not apply any activators of sintering, so chemical composition of porous tungsten material conforms to the chemical composition of the original pure tungsten powder.
5 I.V. Andreiev et al./science of Sintering, 48 (2016) Tab. I The results of the tests of sintered samples in compression. No. Tungsten powder fraction, μm Tensile strength of tungsten materials under compression R cm, MPa Flow reactor Closed reactor broken // Conclusions The use of a closed reactor with hydrogen saturated steam water allows to activate the process of tungsten powders sintering at relatively low temperatures ( C), providing the wide range of pore size in sintered material, depending on the size of the original particles of tungsten powder. Application of above activation method of tungsten powders sintering will produce new radiation-resistant porous tungsten materials for use in fusion reactors to protect working fusion reactor wall and diverter parts, as well as in the metallurgical, chemical processes. 5. References 1. Lassner E., Schubert W.D. Tungsten // New York: Kluwer, p. 2. Katavić B., Nikačević M., Odanović Z. Effect of Cold Swaging and Heat Treatment on Properties of the P/M 91W-6NI-3Co Heavy Alloy // Science of Sintering, V. 40 (2008) P Lisovsky A. F. Formation of Mesostructure in WC Co Cemented Carbides A review // Science of Sintering, V. 43 (2011) P Smirnov V. P. Thermonuclear power engineering the largest international innovation project // Rus. chemical mag. 2008, p Datsenko O. A., KondrikA. I. Prospects of tungsten in thermonuclear installations // Ser. Phys.: Nucleuses, particles, fields, ISS. 2, vol. 46, Kharkov University Gazette, No. 899, p Fedorchenko I.M., Andrievskiy R.A., Fundamentals of powder metallurgy // Publishing House of the Academy of Sciences of Ukraine. K.:-1963, 420 p. 7. Porous powder materials and articles thereof/ P.A. Vityaz, V.M. Kaptzevich, V.K. Sheleg. - Minsk: Higher. Sc, p. 8. Kostornov A.G. Materials science of dispersed and porous metals and alloys. Vol. 2 // K.: Scientific Thought., p. 9. Activated sintering of tungsten / S.V. Matrenin, A.P.Ilyin, A.I. Slosman, L.O. Tolbanova // Tomsk UniversityNews ed No. 3. -P Characteristics of tungsten reduction from its oxide WO 3 in a closed reactor / V.P. Bondarenko, I.V. Andreyev, I.V. Savchuk, L.M. Martynova, A.N. Vashchenko // Super hard materials no 2.-p Bondarenko V. P., Andreyev I.V. Kinetic analysis of reactions of WO 3 reduction by hydrogen in a closed reactor // Superhard materials No 2. - p
6 196 I.V. Andreiev et al. /Science of Sintering, 48 (2016) V.P. Bondarenko, I.V. Andreyev, I.V. Savchuk & other / Recent researches on the metal-ceramic composites based on the decamicron-grained WC // Int. Journal of Refractory Metals and Hard Materials V. 39. P Садржај: Проучаван је метод активираног синтеровања прахова тунгстена употребом затвореног реакционог простора и водоника. Овај процес синтеровања активира прах волфрама на релативно ниским температурама ( C). Кључне речи: тунгстен, синтеровање
UDK: , Activated Sintering of Tungsten Heavy Alloy
Science of Sintering, 49 (2017) 445-453 UDK: 669.018, 622.785 Activated Sintering of Tungsten Heavy Alloy doi: https://doi.org/10.2298/sos1704445c Jitender Chaurasia, Muthuchamy Ayyapan, Paridh Patel,
More informationG. N. Romanov 1, P. P. Тarasov 1, P. K. D yachkovskiy 1, A. P. Savitskii 2*) and L. S. Martsunova 3
Science of Sintering, 38 (2006) 55-62 UDK 622.785:546.62:57.012.3 Liquid-Phase Sintering of Al with Addition of Ti DOI: 10.2298/SOS0601055R G. N. Romanov 1, P. P. Тarasov 1, P. K. D yachkovskiy 1, A. P.
More informationDr. M. Medraj Mech. Eng. Dept. - Concordia University Mech 421/6511 lecture 12/2
POWDER METALLURGY Characterization of Engineering Powders Production of Metallic Powders Conventional Pressing and Sintering Alternative Pressing and Sintering Techniques Materials and Products for PM
More informationEffect of Water Vapor Amount in a Hydrogenous Atmosphere on Structure and Properties of Nickel-Zirconia Anode Materials for Solid Oxide Fuel Cells
Effect of Water Vapor Amount in a Hydrogenous Atmosphere on Structure and Properties of Nickel-Zirconia Anode Materials for Solid Oxide Fuel Cells Bogdan Vasyliv, Viktoriya Podhurska, Orest Ostash Karpenko
More informationDevelopment of feedstock of tungsten-nickel-iron- polyformaldehyde for MIM technology
IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Development of feedstock of tungsten-nickel-iron- polyformaldehyde for MIM technology To cite this article: D V Kostin et al 2016
More informationAn Introduction to Powder Metallurgy
An Introduction to Powder Metallurgy F. THÜMMLER Dr.-Ing.habil, FIM Professor Emeritus for Materials University and Nuclear Research Centre Karlsruhe and R. OBERACKER Dr.-Ing., Central Laboratory Institute
More informationCOMPACTION AND PROPERTIES OF HIGHLY POROUS POWDER PARTS PRODUCED WITH VARIOUS PORE FORMERS
82 Mechanical Testing and Diagnosis ISSN 2247 9635, 2011 (I), Volume 1, 82-87 COMPACTION AND PROPERTIES OF HIGHLY POROUS POWDER PARTS PRODUCED WITH VARIOUS PORE FORMERS Natalia RUDENKO, Alexander LAPTEV
More informationUDK :546.56:669.71: Study on Densification of Laser Ignited Reaction Sintering of Ni-Al-Cu Powder
Science of Sintering, 39 (2007) 31-37 DOI: 10.2298/SOS0701031L UDK 662.785:546.56:669.71:546.74 Study on Densification of Laser Ignited Reaction Sintering of Ni-Al-Cu Powder Y.H. Liu, Z.X. Guo, P. Shen,
More information*Corresponding author:
American Journal of Materials Engineering and Technology, 2015, Vol. 3, No. 3, 58-62 Available online at http://pubs.sciepub.com/materials/3/3/2 Science and Education Publishing DOI:10.12691/materials-3-3-2
More informationA SHORT NOTE ON MANUFACTURING PROCESS OF METAL POWDERS
INTERNATIONAL JOURNAL OF RESEARCH IN COMPUTER APPLICATIONS AND ROBOTICS ISSN 2320-7345 A SHORT NOTE ON MANUFACTURING PROCESS OF METAL POWDERS 1 R.Raja, 2 M.Rajkumar 1 Assistant Lecturer, St. Joseph College
More informationActivated sintering of ceramics on the basis of Al 2 O 3
Activated sintering of ceramics on the basis of Al 2 O 3 S V Matrenin 1, B B Ovechkin 1, B S Zenin 1 and R V Tayukin 1 1 Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, Russia, 634050 E-mail: msv@tpu.ru
More informationCeramic and glass technology
1 Row materials preperation Plastic Raw materials preperation Solid raw materials preperation Aging wet milling mastication Mixing seving Grain size reduction Milling Crushing Very fine milling Fine milling
More informationPowder metallurgy. R.D.Makwana, IT, NU
Powder metallurgy History 1829 Woolaston- paper published Edison-electric light-filament 1909 Coolidge tungsten worked at elevated temperature New method of fabrication-refractory metals 1 Advantages of
More informationCOOPERATIVE PATENT CLASSIFICATION
CPC C COOPERATIVE PATENT CLASSIFICATION CHEMISTRY; METALLURGY (S omitted) METALLURGY C22 METALLURGY (of iron C21); FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS (production of
More informationWC-Cu cermet materials: production and characterization. Flávio Diogo Gonçalves Guerreiro
WC-Cu cermet materials: production and characterization Flávio Diogo Gonçalves Guerreiro flavio.guerreiro@tecnico.ulisboa.pt Instituto Superior Técnico, Lisboa, Portugal Abstract Due to the similar properties
More informationNew sintered materials & processes of joining of nickel super alloys and metal-ceramics using nanostructured interlayers
New sintered materials & processes of joining of nickel super alloys and metal-ceramics using nanostructured interlayers I. Smirnov, V. Kvasnitskiy, Ye. Chvertko* Application of high-current low-energy
More informationDimensional Analysis of Sintered Compacts of Atomized Ferrous Powders from Indian Sponge Iron
International Journal of Engineering and Manufacturing Science. ISSN 2249-3115 Volume 8, Number 1 (2018), pp. 47-54 Research India Publications http://www.ripublication.com Dimensional Analysis of Sintered
More informationThermodynamic conditions for the Mn O system in sintering of manganese steels
Thermodynamic Conditions for the Mn O system 5 Part I Thermodynamic conditions for the Mn O system in sintering of manganese steels 2 2.1. Manganese in steelmaking Manganese is the most widely used alloying
More informationLecture-52 Surface Modification Techniques: HVOF and Detonation Spraying
Fundamentals of Surface Engineering: Mechanisms, Processes and Characterizations Prof.D.K. Dwivedi Department of Mechanical and Industrial Engineering Indian Institute of Technology-Roorkee Lecture-52
More informationMETHODS OF COATING FABRICATION
METHODS OF COATING FABRICATION Zbigniew Grzesik http://home.agh.edu.pl/~grzesik Department of Physical Chemistry and Modelling DEFINITION The coating is the thin outer layer of the object, which physiochemical
More informationELECTRICAL CONTACTS BY POWDER METALLURGY. Submitted by Priyanshu Jain (12518)
ELECTRICAL CONTACTS BY POWDER METALLURGY Submitted by Priyanshu Jain (12518) 1 OUTLINE Electrical contacts: Introduction Desirable Properties of contact material Contact material selection Manufacturing
More informationUltra-met. carbide metalworking technologies (800) (866)
CEMENTED CARBIDE GRAIN STRUCTURES January 2006 720 North Main Street P.O. Box 313 Urbana, OH 43078 800.543.9952 866.543.9952 937.653.7133 Fax: 937.653.4754 CEMENTED CARBIDE GRAIN STRUCTURES January 2006
More informationPowder Metallurgy Preparation of metal powders by Atomization Electrolytic process Reduction. 15CY104: Material Technology SRM University 2
Powder Metallurgy Preparation of metal powders by Atomization Electrolytic process Reduction 15CY104: Material Technology SRM University 2 Powder metallurgy is a term covering a wide range of ways in which
More informationPowder Metallurgy. Science, Technology. and Materials. Anish Upadhyaya. G S Upadhyaya. Department of Materials Science and Engineering
Powder Metallurgy Science, Technology and Materials Anish Upadhyaya Associate Professor Department of Materials Science and Engineering Indian Institute of Technology Kanpur, India G S Upadhyaya Former
More informationInnovative Process for Manufacturing Hydrogenated Titanium Powder for Solid State Production of P/M Titanium Alloy Components
Innovative Process for Manufacturing Hydrogenated Titanium Powder for Solid State Production of P/M Titanium Alloy Components O.M. Ivasishin 1, M.V.Matviychuk 1, C.A.Lavender 2, G.I.Abakumov 3, V.A.Duz
More informationFRAUNHOFER INSTITUTE FOR CERAMIC TECHNOLOGIES AND SYSTEMS IKTS CENTER OF COMPETENCE POWDER TECHNOLOGY
FRAUNHOFER INSTITUTE FOR CERAMIC TECHNOLOGIES AND SYSTEMS IKTS CENTER OF COMPETENCE POWDER TECHNOLOGY PRODUCT DESIGN READY-TO-PRESS-POWDER (PREMIX) POWDER FOR THERMAL CLADDING AND SPRAYING FUNCTIONAL POWDERS
More informationMICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALUMINUM- SILICON CARBIDE COMPOSITE FABRICATED BY POWDER METALLURGY
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALUMINUM- SILICON CARBIDE COMPOSITE FABRICATED BY POWDER METALLURGY 1 MUSTAFA KHALEEL IBRAHIM, 2* JAMALIAH IDRIS 1,2 Department of Material Engineering, Faculty
More informationIncrease powder packing density. Spherical particles provide denser packing of powders, increasing overall bulk tap density.
Plasma power can make better powders It may be a truism to say that round powders pack better, but spheroidisation of powder particles is one of the successful commercial applications of induction plasma
More informationScience of Sintering, 47 (2015) doi: /SOS Y
Science of Sintering, 47 (215) 215-219 doi: 1.2298/SOS152215Y UDK 549.632; 622.785 Interpretation of Frenkel s Theory of Sintering Considering Evolution of Activated Pores: III. Determination of Equilibrium
More informationMicrostructural Evolution of W-Ni-Fe During Liquid Phase Sintering A Quenching Study
Microstructural Evolution of W-Ni-Fe During Liquid Phase Sintering A Quenching Study N.B. Erhardt*, P. Suri, R.M. German, Center for Innovative Sintered Products, 147 Research West, The Pennsylvania State
More informationSurface Coating of Tungsten Carbide by Electric Exploding of Contact
Surface Coating of Tungsten Carbide by Electric Exploding of Contact Evgeny G. Grigoryev General Physics Department, Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409, Russia Abstract.
More informationJānis Grabis. Plasma chemical synthesis of multicomponent nanopowders, their characteristics, and processing
Jānis Grabis Plasma chemical synthesis of multicomponent nanopowders, their characteristics, and processing Outline Introduction nanoparticles, their preparation methods Experimental synthesis of multicomponent
More informationSintering of HDH Ti powder
Sintering of HDH Ti powder Kováčik Jaroslav 1, Emmer Štefan 2 11 1 Keywords: powder metallurgy, sintering, titanium, HDH powder Abstract Titanium powders prepared by hydro-dehydration process (HDH powder)
More informationW-15wt%Cu
- 2 1 *1-1 -2 * elt_ahmadi@alum.sharif.edu (1390/03/28 : 1389/12/23 : ) W-15wt%Cu. 3 2 1 /. 1250 1200 1150 1100 90 15 750 700 650. 60.. 63. 445 72/9 90 700 16/1-60 1200. :. - 7. (1) -.[4-9] -1-3 1 2 5.[1-7]
More informationRAPID PATTERN BASED POWDER SINTERING TECHNIQUE AND RELATED SHRINKAGE CONTROL
RAPID PATTERN BASED POWDER SINTERING TECHNIQUE AND RELATED SHRINKAGE CONTROL Jack G. Zhou and Zongyan He ABSTRACT Department of Mechanical Engineering and Mechanics Drexel University 3141 Chestnut Street
More informationSTRUCTURE AND PROPERTIES OF ALUMINUM ALLOYS WITH ADDITIONS OF TRANSITION METALS PRODUCED VIA COUPLED RAPID SOLIDIFICATION AND HOT EXTRUSION
STRUCTURE AND PROPERTIES OF ALUMINUM ALLOYS WITH ADDITIONS OF TRANSITION METALS PRODUCED VIA COUPLED RAPID SOLIDIFICATION AND HOT EXTRUSION KULA Anna 1, BLAZ Ludwik 1 1 AGH University of Science and Technology,
More informationPREPARATION OF THE NITI SHAPE MEMORY ALLOY BY THE TE-SHS METHOD INFLUENCE OF THE SINTERING TIME
PREPARATION OF THE NITI SHAPE MEMORY ALLOY BY THE TE-SHS METHOD INFLUENCE OF THE SINTERING TIME Jaroslav ČAPEK, Vojtěch KUČERA, Michaela FOUSOVÁ, Dalibor VOJTĚCH Department of Metals and Corrosion Engineering,
More informationFULL-DENSIFICATION OF SLS PARTS BY RE-MELTING. Abstract
FULL-DENSIFICATION OF SLS PARTS BY RE-MELTING T. NIINO and H. YAMADA Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba Meguro Tokyo, 153-8505 Japan Reviewed, accepted August 4, 2004
More informationPowder Technology course Autumn semester Sintering theory. Peter M Derlet Condensed Matter Theory Paul Scherrer Institut.
Powder Technology course Autumn semester 2018 Sintering theory Peter M Derlet Condensed Matter Theory Paul Scherrer Institut peter.derlet@psi.ch References German, R.M. (1994) Powder metallurgy science,
More informationFree Sintering or Hot Pressing? A Decision Support
Free Sintering or Hot Pressing? A Decision Support Christian H. Kühl Diamond Tool Consulting Neuhofer Straße 13b, 24558 Henstedt-Ulzburg christian.h.kuehl@gmx.de www.diamond-tool-consulting.de Abstract
More informationThe Improvement in Strength of Sintered Machine Parts
[ Technical Article ] The Improvement in Strength of Sintered Machine Parts Takahiro OKUNO* Naoki YASHIRO* Sintered machine parts are used in many industrial fields. Especially, these are widely used for
More informationPowder Metallurgy. by Haipan Salam
Powder Metallurgy by Haipan Salam In the sintering operation, the pressed-powder compacts are heated in a controlled atmosphere to right below the melting point (70%-90% of melting point of metals or
More informationCore-Shell-Structured Tungsten Composite Powders. A. Bicherl*, A. Bock*, B. Zeiler*, W.D. Schubert**
Bicherl, Bock, Zeiler et al. 17th Plansee Seminar 2009, Vol. 3 GT 27/1 ore-shell-structured Tungsten omposite Powders A. Bicherl*, A. Bock*, B. Zeiler*,.D. Schubert** *olfram Bergbau- und Hütten GmbH NfG
More informationTable of Contents. Preface...
Preface... xi Chapter 1. Metallurgical Thermochemistry... 1 1.1. Introduction... 1 1.2. Quantities characterizing the state of a system and its evolution... 3 1.2.1. The types of operations... 3 1.2.2.
More informationSTRUCTURE AND MECHANICAL PROPERTIES OF NICKEL ALLOYS
STRUCTURE AND MECHANICAL PROPERTIES OF NICKEL ALLOYS Martin POHLUDKA a, Jitka MALCHARCZIKOVÁ a, Vít MICHENKA b, Miroslav KURSA a, Tomáš ČEGAN a, Ivo SZURMAN a a VŠB Technical University of Ostrava, 17.
More informationSURFACE MODIFICATIONS OF PM STAINLESS STEELS FOR ENHANCED CORROSION RESISTANCE
SURFACE MODIFICATIONS OF PM STAINLESS STEELS FOR ENHANCED CORROSION RESISTANCE Chris Schade Hoeganaes Corporation Cinnaminson, NJ 08077 ABSTRACT In general, PM stainless steel parts have inferior corrosion
More informationChapter 18: Powder Metallurgy
Chapter 18: Powder Metallurgy ผ ช วยศาสตราจารย เร อโท ดร. สมญา ภ นะยา Reference: DeGarmo s Materials and Processes in Manufacturing 18.1 Introduction Powder metallurgy is the name given to the process
More informationTHE EFFECT OF SOL-GEL TECHNIQUE ON THE ALUMINIUM SiCp COMPOSITE
Jurnal Mekanikal June 2005, No. 19, 11 21 THE EFFECT OF SOL-GEL TECHNIQUE ON THE ALUMINIUM SiCp COMPOSITE Jamaliah Idris [1] and N.J. Nee [2] [1] Assoc. Prof. [2] Undergraduate student Faculty of Mechanical
More informationTHERMAL SPRAY COATINGS
THERMAL SPRAY COATINGS THERMAL SPRAY is a group of processes in which metals, alloys, ceramics, plastics and composite materials in the form of powder, wire, or rod are fed to a torch or gun with which
More informationMETALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON- FERROUS METALS
XXXX C22 METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON- FERROUS METALS Note(s) [2012.01] (1) Processes or devices specific to the transformation of iron ore or iron carbonyl into
More informationIntroduction to PM. Marco Actis Grande
Introduction to PM Marco Actis Grande What is PM? Materials forming technique Create powders (metallic & non-metallic) Assemble them into artefacts of desired shape Cause the powder particles to adhere
More informationPart B. Unit8 (Class16) Powder Metallurgy. Powder Extrusion
Part B Unit8 (Class16) Powder Metallurgy Powder Production Reduction,Electrolytic deposition, Pulverization, Mechanical Alloy and othersblending of powderscompaction of Powders Punch and Die,Rolling, Extrusion,
More informationThe Effect of Processing and Density on P/M Soft Magnetic Properties. Ian W. Donaldson, GKN Sinter Metals, Worcester, MA, USA
he Effect of Processing and Density on P/M Soft Magnetic Properties Ian W. Donaldson, GKN Sinter Metals, Worcester, MA, USA Fran Hanejko, Hoeganaes Corporation, Cinnaminson, NJ, USA Abstract: With the
More informationMetallurgy, Alloys, and Applications p. 1 Introduction and Overview p. 3 Major Groups of Copper and Copper Alloys p. 3 Properties of Importance p.
Preface p. vii Metallurgy, Alloys, and Applications p. 1 Introduction and Overview p. 3 Major Groups of Copper and Copper Alloys p. 3 Properties of Importance p. 3 Fabrication Characteristics p. 5 Alloy
More informationStructural materials for Fusion and Generation IV Fission Reactors
Hungarian Academy of Sciences KFKI Atomic Energy Research Institute Structural materials for Fusion and Generation IV Fission Reactors Ákos Horváth Materials Department akos.horvath@aeki.kfki.hu EFNUDAT
More informationDepartment of Chemical Engineering and Materials,
l Si Department of Chemical Engineering and Materials, Al in a real industrial process using a commercial Al Si hypoeutectic alloy. The modi- with WC nanoparticles was determined after T6 heat treatment
More informationNeutron Irradiation Effects on Grain-refined W and W-alloys
25th IAEA Fusion Energy Conference 13 18 October 2014 Saint Petersburg, Russian Federation MPT/1-4 Neutron Irradiation Effects on Grain-refined W and W-alloys A. Hasegawa a, M. Fukuda a, T. Tanno a,b,
More informationDEVELOPMENT OF NANO-TUNGSTEN-COPPER POWDER AND PM PROCESSES. 1 Agency for Defense Development Yuseong, P.O.Box 35-5, Daejon , Korea
DEVELOPMENT OF NANO-TUNGSTEN-COPPER POWDER AND PM PROCESSES 1 Seong Lee, 1 Joon-Woong Noh, 2 Young-Sam Kwon, 2 Seong Taek Chung, 3 John L. Johnson, 4 Seong Jin Park and 4 Randall M. German 1 Agency for
More informationFundamentals of Low Cost Titanium Hydride Powder Metallurgy
Fundamentals of Low Cost Titanium Hydride Powder Metallurgy Orest Ivasishin 1, Vladimir Moxson 2 1 Institute for Metal Physics, 36 Vernadsky str., Kiev 03142, Ukraine 2 ADMA Products Inc., 2035 Midway
More informationFe-Al-Si-X ALLOYS FOR HIGH TEMPERATURE APPLICATIONS
Fe-Al-Si-X ALLOYS FOR HIGH TEMPERATURE APPLICATIONS Pavel NOVÁK a, Václav HO EK, Lucie MEJZLÍKOVÁ, Jan ERÁK, Dalibor VOJT CH Department of Metals and Corrosion Engineering, Institute of Chemical Technology,
More informationASTM Volume 02.05, May 2017 Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products
1 B136-84(2013) Standard Method for Measurement of Stain Resistance of Anodic Coatings on Aluminum 2 B137-95(2014) Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated
More informationDILATOMETRIC STUDY ON LIQUID PHASE SINTERING OF Al-Ni POWDER COMPACTS
Powder Metallurgy Progress, Vol.6 (2006), No 3 128 DILATOMETRIC STUDY ON LIQUID PHASE SINTERING OF Al-Ni POWDER COMPACTS G. N. Romanov, P. P. Тarasov, P. K. D yachkovskiy, A. P. Savitskii, H. Danninger
More informationWC / Ag Contact Materials with Improved Homogeneity
200 RM 20 R. Grill et al. WC / Ag Contact Materials with Improved Homogeneity Robert Grill 1, Peter Kläusler ², Frank E.-H. Mueller², Oswald Schrott³, Hans Hauser ³ 1 Plansee Aktiengesellschaft, A-6600
More informationGlobal Journal of Engineering Science and Research Management
DIFFUSION BONDING OF AL ALLOY USING DIFFERENT IINTERLAYERS Assist. Prof. Dr. Ahmed A. Akbar*, Samer K. Khaleel * Asst. Prof. Dr. at University of Technology, Production Engineering and Metallurgy, Iraq
More informationDunarea de Jos University of Galati, 47 Domneasca Street, Galati, ROMANIA,
SURFACE TREATMENT OF IRON- BASED SINTERED COMPACTS FOR CORROSION PROTECTION POTECASU Florentina, RADU Tamara, POTECASU Octavian, MARIN Mihaela, CIOCAN Anisoara Dunarea de Jos University of Galati, 47 Domneasca
More informationDURABILITY of CONCRETE STRUCTURES
DURABILITY of CONCRETE STRUCTURES Assist. Prof. Dr. Mert Yücel YARDIMCI This presentation covers the subjects in CEB Durable Concrete Structures Guideline and has been prepared by the graduate students
More informationMSE 351 Engineering Ceramics I
Kwame Nkrumah University of Science & Technology, Kumasi, Ghana MSE 351 Engineering Ceramics I Ing. Anthony Andrews (PhD) Department of Materials Engineering Faculty of Mechanical and Chemical Engineering
More informationPECULARITIES OF GAS ANALYSIS IN Al AND Mg POWDERS
Powder Metallurgy Progress, Vol.17 (2017), No.1, p.065-071 http://dx.doi.org/10.1515/pmp-2017-0007 PECULARITIES OF GAS ANALYSIS IN Al AND Mg POWDERS P. Oslanec, M. Škrobian Abstract A new inert gas fusion
More informationMetallurgical Processes
Metallurgical Processes Chapter Sixteen: Powder Metallurgy Dr. Eng. Yazan Al-Zain Department of Industrial Engineering 1 Introduction Powder Metallurgy (PM): is a metal processing technology in which parts
More informationPowder Metallurgy Bachelor of Industrial Technology Management with Honours Semester I Session 2013/2014
Powder Metallurgy Bachelor of Industrial Technology Management with Honours Semester I Session 2013/2014 TOPIC OUTLINE What Is Powder Metallurgy (P.M)? Powder Metallurgy Processes Blending And Mixing Compaction
More informationActivation of consolidation processes of alumina ceramics
IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Activation of consolidation processes of alumina ceramics To cite this article: S V Matrenin et al 2016 IOP Conf. Ser.: Mater.
More informationP. Bai, Y. Li *) College of Material Science and Engineering, North University of China, Taiyuan , China
Science of Sintering, 41 (2009) 35-41 doi: 10.2298/SOS0901035B UDK 622.785:661.8:666.195.514 Study on High Temperature Sintering Processes of Selective Laser Sintered Al 2 O 3 /ZrO 2 /TiC Ceramics P. Bai,
More informationEffects of holding pressure and process temperatures on the mechanical properties of moulded metallic parts
Downloaded from orbit.dtu.dk on: Apr 04, 2018 Effects of holding pressure and process temperatures on the mechanical properties of moulded metallic parts Islam, Aminul; Hansen, Hans Nørgaard; Esteves,
More informationTHE TECHNOLOGY AND PROPERTIES OF COMBINED SPRAYED BARRIER COATINGS
PROFESSIONAL STUDIES: THE TECHNOLOGY AND PROPERTIES OF COMBINED SPRAYED BARRIER COATINGS Toomas Pihl Tallinn University of Applied Sciences Estonia Valdek Mikli Tallinn University of Technology Estonia
More informationBMM3643 Manufacturing Processes Powder Metallurgy Process
BMM3643 Manufacturing Processes Powder Metallurgy Process by Dr Mas Ayu Bt Hassan Faculty of Mechanical Engineering masszee@ump.edu.my Chapter Synopsis This chapter will expose students to the sequence
More informationV. Pouchly 1*), K. Maca 1,2, Y. Xiong 3, J.Z. Shen 3
Science of Sintering, 44 (2012) 169-175 DOI:10.2298/SOS1202169P UDK 622.785:531.3 Master Sintering Surface A Practical Approach to Its Construction and Utilization for Spark Plasma Sintering Prediction
More informationPOWDER METALLURGY PREPARATION OF POROUS TITANIUM FOR MEDICAL IMPLANTS. Pavel NOVÁK, Ladislav SITA, Anna KNAISLOVÁ, Dalibor VOJTĚCH
POWDER METALLURGY PREPARATION OF POROUS TITANIUM FOR MEDICAL IMPLANTS Pavel NOVÁK, Ladislav SITA, Anna KNAISLOVÁ, Dalibor VOJTĚCH Institute of Chemical Technology, Prague, Department of Metals and Corrosion
More informationBENCHMARKING SUMMARY BETWEEN SLM AND EBM RELATED TO POWDER RECYCLING.
BENCHMARKING SUMMARY BETWEEN SLM AND EBM RELATED TO POWDER RECYCLING. In the ManSYS project a method has been specified which examines components for meeting required specifications (qualifying criteria)
More informationIncorporation of Titanium, Tantalum, and Vanadium Into the Hexagonal WC Lattice. A. Pasquazzi*, W.D. Schubert*, E. Halwax*, G.
18 th Plansee Seminar HM 108/1 Incorporation of Titanium, Tantalum, and Vanadium Into the Hexagonal WC Lattice A. Pasquazzi*, W.D. Schubert*, E. Halwax*, G. Kremser** * Vienna University of Technology,
More informationTHINK. Filter Technology SIKA-R... IS/AS
THINK Filter Technology SIKA-R... IS/AS ENGINEERING THAT MOVES THE WORLD Since 1759 250 years of exceptional engineering GKN Sinter Metals Filters, the leading manufacturer of porous sinter metal products,
More informationTHE INFLUENCE OF MECHANICAL ALLOYING DURATION ON SELECTED PROPERTIES OF SINTERED DISTALOY SE SAMPLES
ANNALS of Faculty Engineering Hunedoara International Journal of Engineering Tome XIV [2016] Fascicule 2 [May] ISSN: 1584-2665 [print; online] ISSN: 1584-2673 [CD-Rom; online] a free-access multidisciplinary
More informationHEAT-RESISTANT BRAZING FILLER METALS FOR JOINING TITANIUM ALUMINIDE AND TITANIUM ALLOYS
HEAT-RESISTANT BRAZING FILLER METALS FOR JOINING TITANIUM ALUMINIDE AND TITANIUM ALLOYS Alexander E. Shapiro* and Eugene Y. Ivanov** *Titanium Brazing, Inc., Columbus, OH, ashapiro@titanium-brazing.com
More informationUDK Sintering Nanodisperse Zirconium Powders with Various Stabilizing Additives
Science of Sintering, 43 (2011) 127-132 UDK 546.846.834-31 Sintering Nanodisperse Zirconium Powders with Various Stabilizing Additives doi: 10.2298/SOS1102127A V. N. Antsiferov *), S. E. Porozova, V. B.
More informationSwapan Kumar Karak. Department of Metallurgical and Materials Engineering NIT Rourkela, , India
NMD-ATM Development of Nano-Y 2 O 3 Dispersed Ferritic Alloys for Nuclear Reactors S. K. Karak, J. Dutta Majumdar, W. Lojkowski and I. Manna by Swapan Kumar Karak Department of Metallurgical and Materials
More informationChanges in the Structure and Properties of Electrodeposited Metal Coatings in the Process of Aging
Advances in Materials 2015; 4(3-1): 27-32 Published online June 17, 2015 (http://www.sciencepublishinggroup.com/j/am) doi: 10.11648/j.am.s.2015040301.14 ISSN: 2327-2503 (Print); ISSN: 2327-252X (Online)
More informationSpecial Electrically Resistant Heated Furnaces
Special Electrically Resistant Heated Furnaces Drying of Ceramic Components Autor: Roland Waitz, Malte Möller Many ceramic masses are fabricated in plastic or liquid condition by addition of water. In
More informationComposite Materials. Metal matrix composites
Composite Materials Metal matrix composites Introduction The properties that make MMCs attractive are high strength and stiffness, good wear resistance, high service temperature, tailorable coefficient
More informationPorous NiTi alloy prepared from elemental powder sintering
Porous Ti alloy prepared from elemental powder sintering Bing-Yun Li, Li-Jian Rong and Yi-Yi Li Laboratory of Atomic Imaging of Solids, Institute of Metal Research Chinese Academy of Sciences, Shenyang
More informationApplication and importance of copper and copper powder on powder metallurgy field
Application and importance of copper and copper powder on powder metallurgy field In recent years, powder metallurgy scholars have paid more attention to materials that have nanometer and composite feature.
More informationChallenges in Processing of P/M Chromium Manganese Low-Alloy Steels
Challenges in Processing of P/M Chromium Manganese Low-Alloy Steels Robert J. Causton 1 and Bruce A. Lindsley 2 1 Hoeganaes Corporation, Buzau, Romania 2 Hoeganaes Corporation, Cinnaminson, NJ 08077, USA
More informationPowder Technology course Autumn semester Sintering theory. Peter M Derlet Condensed Matter Theory Paul Scherrer Institut.
Powder Technology course Autumn semester 2017 Sintering theory Peter M Derlet Condensed Matter Theory Paul Scherrer Institut peter.derlet@psi.ch 2 References German, R.M. (1994) Powder metallurgy science,
More informationThe Recycling of Steel and Brass Chips to Produce Composite Materials via Cold Pressing and Sintering
The International Journal Of Engineering And Science (IJES) Volume 5 Issue 5 Pages PP -1-6 216 ISSN (e): 2319 1813 ISSN (p): 2319 185 The Recycling of Steel and Brass Chips to Produce Composite Materials
More informationPROPERTIES AND MICROSTRUCTURES OF SINTERED STAINLESS STEEL PREPARED FROM 304L AND 410L POWDERS
PROPERTIES AND MICROSTRUCTURES OF SINTERED STAINLESS STEEL PREPARED FROM 304L AND 410L POWDERS B. Vetayanugul, N. Tosangthum, R. Krataitong, M. Morakotjinda, A. Daraphan, T. Yotkaew, O. Coovattanachai
More informationHot Forging Behaviour of Sintered AISI 8720 P/M Steels
Hot Forging Behaviour of Sintered AISI 8720 P/M Steels 1 L. Arulmani, 2 K.S. Pandey 1 Dept. of Mechanical Engineering, R.R. Institute of Technology, Bangalore, India. 2 Department of Metallurgical and
More informationJoint Technology Initiatives Collaborative Project (FCH) FCH-JU WP4 - Development of lab-scale cell components
Joint Technology Initiatives Collaborative Project (FCH) FCH-JU-2010-1 WP4 - Development of lab-scale cell components DELIVERABLE 4.3- Prepared by: HOGANAS Document control data Document ref. : METPROCELL-WP4-
More informationSintered powder composition on the basis of Mo-TiC
Sintered powder composition on the basis of Mo-TiC Norkhudzhaev F.R., Nazarov A.M., Yakubov L.E. Doctor of Philosophy, Department of Materials Science, Tashkent State Technical University, Tashkent, Uzbekistan
More informationCermet Filters To Reduce Diesel Engine Emissions
Cermet Filters To Reduce Diesel Engine Emissions Peter C. Kong Idaho National Engineering and Environmental Laboratory P.O. Box 1625, Idaho Falls, ID 83415-2210 Phone: (208)526-7579; Fax: (208)526-0690;
More informationThe following steps are used in the powder metallurgy techniques:
Advantages of Powder Metallurgy Virtually unlimited choice of alloys and non metallicswith associated properties. * A variety of metal or non metal powders can be used. * Refractory materials are popularly
More informationMICROWAVE SINTERING OF ELECTROLESS Ni PLATED B 4 C POWDERS. Ayhan EROL, Ahmet YONETKEN
Afyon Kocatepe Üniversitesi Özel Sayı Afyon Kocatepe University FEN BİLİMLERİ DERGİSİ 223-228 JOURNAL OF SCIENCE MICROWAVE SINTERING OF ELECTROLESS Ni PLATED B 4 C POWDERS Ayhan EROL, Ahmet YONETKEN Afyon
More informationEffects of particle shape and temperature on compaction of copper powder at micro scale
Effects of particle shape and on compaction of copper powder at micro scale hao-heng hang * and Ming-Ru Wu Department of Mold and Die Engineering, National Kaohsiung University of pplied Sciences, Kaohsiung,
More information