THE EFFECT OF SILICA ON THE MICROSTRUCTURE OF MnZn FERRITES
|
|
- Phyllis Rice
- 6 years ago
- Views:
Transcription
1 THE EFFECT OF SILICA ON THE MICROSTRUCTURE OF MnZn FERRITES A. Giles, F. Westendorp To cite this version: A. Giles, F. Westendorp. THE EFFECT OF SILICA ON THE MICROSTRUCTURE OF MnZn FERRITES. Journal de Physique Colloques, 1977, 38 (C1), pp.c1-317-c < /jphyscol: >. <jpa > HAL Id: jpa Submitted on 1 Jan 1977 HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
2 JOURNAL DE PHYSIQUE Colloque Cl, supplkment au no 4, Tome 38, Aoril 1977, page Cl-317 THE EFFECT OF SILICA ON THE MICROSTRUCTURE OF MnZn FERRITES A. D. GILES Mullard Research Laboratories, Redhill, Surrey, U. K. F. F. WESTENDORP Mullard Magnetic Components, Southport, Lancs., U. K. RkurnB. - L'effet de la silice Si02 sur la microstructure d'un ferritc de manganese-zinc a et6 Ctudie aussi bien par addition de teneurs croissantes de poudre fine de silice - jusqu'a 0,75 Zen poids - que par addition de poudres de silice de differentes grosseurs. La position et la forme de la silice dans le materiau ceramique ont CtC Ctudikes en utilisant diverses techniques, en particulier en combinant I'attaque chimique avec la rnicroscopie Clectronique a balayage et I'analyse par microsonde. Abstract. - The effect of silica, SiO2, on the microstructure of a manganese-zinc ferro ferrite has been studied both by the addition of increasing amounts of fine silica flour, up to ,{ by weight, and by the addition of different grades of silica. The position and form of the silica in the ceramic has been studied using a variety of techniques in particular combining etching with scanning electron rnicroscopy and electron microprobe analysis. 1. Introduction. - Silica is known to have a strong effect on the microstructure [l] of MnZn ferrites and promotes (( coarse crystallisation i. e. large grains with enclosed pores tend to form. Its effect is often explained by the presence of a grain boundary phase which is silica based and said to be liquid at the firing temperature [2, 31. Evidence for this boundary phase has been obtained using electron microprobe techniques and Auger spectroscopy on freshly fractured surfaces (by Verhoeven (unpublished)). Both these methods were thought to be rather indirect. In the electron microprobe method and at the silica levels of interest, any grain boundary phase is below the resolution of the instrument and in the Auger spectroscopy method the spatial resolution is such that only bulk grain boundary effects can be observed. In addition to its effect on microstructure, it is possible that silica could cause precipitates within grains resulting in a deterioration in the magnetic properties, both directly through domain wall pinning and indirectly through the system of internal stresses set up on cooling from the firing temperature. It was thought that if, by suitable heat treatment, one could alter the form or position of silica-rich regions one might improve the magnetic properties of ferrites with high silica contents. The need for a method to observe the position and form of the silica in this study is of prime importance. 2. Sample batches and preparation. - In a first set of experiments, batches of MnZn ferrite powder were prepared from pure raw materials with increasing additions of fine silica flour as shown in the table below : Batch "/, w/w SiO2 addition Rings from each of these batches were pressed and fired identically in a kiln with computer control of atmosphere and temperature. Successive sets of rings were fired under a variety of conditions. In a second experiment equal amounts of SiO, of different particle size ranging from fine flour to coarse sand were added to the ferrite powder prior to pressing. Rings pressed from these batches were fired at several temperatures. 3. Results DENSITY. -. Figure 1 gives the sintered density as a function of silica addition for different firing temperatures. It is to be noted that batch 67 (0.16 %, SiO,) sinters to a normal density of 4.6 g ~rn-~ at OC ; this is typical of the density normally achieved with undoped materials fired at OC. 3.2 MAGNETIC PROPERTIES. - The materials investigated were high power ferrites for which the critical properties are saturation flux density and power loss. Figure 2 gives the power loss density, P,,,, as a function of SiO, addition for different firing temperatures. The losses for high silica batches are always high. At lower firing temperatures small additions of silica are seen to decrease the losses, but as the temperature rises the minimum in P,,, goes to lower silica content, the Article published online by EDP Sciences and available at
3 Cl-3 18 A. D. GILES AND F. F. WESTENDORP ' L 06. J 3 6 Sm02 odj~t,on ("i,) FIG Sinter density as a function of Si02 addition and firing temperature Botcn number IiII~I SIO, Add~t~on ("l0) FIG Power loss density as a function of SiOz addition and firing temperature. minirlium loss found being 50 kw m-3 with the pure sample and high firing temperature. The saturation measured at 800 Am-' increases at first with silica content but falls off at the two highest silica levels in a manner corresponding to the decrease of the density values. 3.3 MICROSTRUCTURE. - Scanning electron micro- graphs at 275 OC FIG Scanning electron micrographs of polished and lightly are shown in figure 3. At high firing temperatures the etched samples fired at W.
4 THE EFFECT O F SILICA ON THE M ICROSTRUCTURE O F MnZn FERRITES general trend was that the microstructure changed from a normal fine-grained structure at low silica contents, through increasingly coarse crystallised microstructures at intermediate silica levels, and back to fine grained structures at the two highest silica levels. At the lowest firing temperatures no coarse crystals were observed in any of the batches, the first appearing in batch 67 (0.16 "/,io,) at OC although the coarse grains in this case remained < 10 pm. The second experiment on the effect of the particle size of the silica addition confirmed the tendency towards coarse crystallization once the firing temperature was high enough for the silica to diffuse into the microstructure. At O C the particle size appears to have no effect except in the casc of the coarse sand addition. These particles diffused into the rnicrostructure giving the three regions observed in the first experiment. Figure 4 shows, immediately round the FIG.4. - Optical micrograph of a sample with coarse sand addition fired a t O C. hole where the silica grain once was. fine pore-free grains with thick grain boundaries. Further from the hole the grains become increasingly coarse-crystallised, initially a mixture of fine and coarse grains with some pores on the grain boundaries while further from the hole huge grains occur with few grain boundary pores. Beyond this region normal fine microstructure is observed. 4. Identification of second phases in the microstructures. - A combination of etching, scanning microscopy (SEM) and electron microprobe analysis were the main tools used in this study. The etching of polished and fractured surfaces in a dilute hydrofluoriclnitric acid revealed etch pits and particles in both the intermediate and high silica batches. By the technique of returning to an identified area before and after etching, etch pits were always found to originate from pores. The particles revealed by etching and any Cl-319 grain boundary phases present were too small (< 1 (pm)3) to identify by microprobe analysis except in a few cases in the highest silica batches where they proved to have a high silica content. By etching samples containing more than about 0.1 o/;i SiO, in hot concentrated hydrochloric acid it was possible to remove the ferrite grains to reveal a white skeleton retaining the overall shape of the original piece of ferrite (l). Microprobe analysis and chemical analysis of the skeleton show it to be almost pure silica with traces of the main ferrite constituents. Figure 5 shows an SEM picture of a sample etched for FIG.5. - Scanning electron micrograph of the silica skeleton emerging from a ferrite surface. one minute. The surface of the ferrite can be seen with an intricate structure of interconnecting silica strands emerging from it. The strands appear to be silica which has been trapped at the junction of three grains. Occasionally in samples with high silica content fine membranes can be seen and, particularly in coarse crystallised samples, circular rings of silica are seen resting on the ferrite surface. The grain structure in the silica is seen best using stereo pairs of micrographs. At the lower silica levels the strands are finer and cannot support themselves, giving a fine matted structure, figure 6. The study of the skeleton is more useful if we can see it emerging from the ferrite. We have done this by examining the same point on the surface after succes(l) After N. Meyer, N. V. Philips, Uden.
5 C1-320 A. D. GILES AND F. F. WESTENDORP were thicker and reached their final thickness of pm, at the end of the l 275 OC soak when the grain size was 8-12 pm. No physical difference was observed between the samples quenched from the top temperature and those cooled normally, however x-ray diffraction analysis of the two skeletons showed the quenched skeleton to be amorphous while the slow-cooled skeleton was cc crystobalite. An amorphous or even liquid phase at OC would be possible in the presence of impurities. On cooling a eutectic would form, the silica part of which is observcd as the skeleton. The formation of cc crystobalite is more difficult to explain. This does not usually form below OC, however the conditions of pressure and the influence of the surrounding cubic ferrite crystals on the silica as it cools are unknown. FIG Scanning electron micrograph of the collapsed silica skeleton of a sample containing 0.02 % SiOz addition. sive etching periods and indeed the strands appear at the intersection of grains while the unconnected silica rings appear from pores found within coarse crystallised grains. Pores on grain boundaries tend to result in a triangular silica structure. An attempt was made to find out at what temperature the silica appears at the grain boundary. This was done by quenching samples from different points on the OC firing cycle and examining them by this technique. At 1 200OC the silica was not visible, at O C fine wisps of < 0.1 pm could be seen on grains of 2-3 pm diameter, at OC the strands 5. Conclusions.-The effect of silica on the microstructure of manganese zinc ferrites has been demonstrated. Intermediate levels of silica ( :/, w/w) promote coarse crystallization and result in deterioration of magnetic properties except at low firing temperatures where some advantage is gained due to their higher sinterability. Samples with the highest silica levels exhibit a finer microstructure but very poor properties. This may be due to a thicker, stiffer grain boundary phase causing stresses and silica rich precipitates within the grains. It has been demonstrated that the silica forms an amorphous grain boundary phase during sintering and that this can be observed by etching in hot concentrated hydrochloric acid. Silica is also present inside grains around closed pores. References [I) BANDO, Y., et al., Proc Int. Perm Magnet. Conf. N. Y. 4 (1971) KOOY, C., Sci. Ceram. 1 (1961) 21. [3] CARPAY, F. M. A. and Srurl~s, A. L., Sci. Ceram. 8 (1975)
CHEMICAL VAPOR DEPOSITION OF IR-TRANSMITTING ZINC SULPHIDE
CHEMICAL VAPOR DEPOSITION OF IR-TRANSMITTING ZINC SULPHIDE Ph. Braudeau, G. Keller, J. Torre To cite this version: Ph. Braudeau, G. Keller, J. Torre. CHEMICAL VAPOR DEPOSITION OF IR- TRANSMITTING ZINC
More informationHigh Purity Chromium Metal Oxygen Distribution (Determined by XPS and EPMA)
High Purity Chromium Metal Oxygen Distribution (Determined by XPS and EPMA) K. Suzuki, H. Tomioka To cite this version: K. Suzuki, H. Tomioka. High Purity Chromium Metal Oxygen Distribution (Determined
More informationLaser cladding of copper base alloys onto Al Si7 Mg0.3
Laser cladding of copper base alloys onto Al Si7 Mg0.3 L. Poire, E. Blank To cite this version: L. Poire, E. Blank. Laser cladding of copper base alloys onto Al Si7 Mg0.3. Journal de Physique IV Colloque,
More informationATOM PROBE ANALYSIS OF β PRECIPITATION IN A MODEL IRON-BASED Fe-Ni-Al-Mo SUPERALLOY
ATOM PROBE ANALYSIS OF β PRECIPITATION IN A MODEL IRON-BASED Fe-Ni-Al-Mo SUPERALLOY M. Miller, M. Hetherington To cite this version: M. Miller, M. Hetherington. ATOM PROBE ANALYSIS OF β PRECIPITATION IN
More informationSTRAIN RATE DEPENDENCE ON MECHANICAL PROPERTIES IN SOME COMMERCIAL ALUMINUM ALLOYS
RATE DEPENDENCE ON MECHANICAL PROPERTIES IN SOME COMMERCIAL ALUMINUM ALLOYS K. Higashi, T. Mukai, K. Kaizu, S. Tsuchida, S. Tanimura To cite this version: K. Higashi, T. Mukai, K. Kaizu, S. Tsuchida, S.
More informationTHERMAL PULSE ANNEALING OF TITANIUM AND TANTALUM SILICIDES
THERMAL PULSE ANNEALING OF TITANIUM AND TANTALUM SILICIDES P. Rosser, G. Tomkins To cite this version: P. Rosser, G. Tomkins. THERMAL PULSE ANNEALING OF TITANIUM AND TAN- TALUM SILICIDES. Journal de Physique
More informationGrain growth and Ostwald ripening in chromia-doped uranium dioxide
Grain growth and Ostwald ripening in chromia-doped uranium dioxide V. Peres, L. Bourgeois, P. Dehaudt To cite this version: V. Peres, L. Bourgeois, P. Dehaudt. Grain growth and Ostwald ripening in chromia-doped
More informationEffects of temperature on monotonic and fatigue properties of carbon fibre epoxy cross ply laminates
Effects of temperature on monotonic and fatigue properties of carbon fibre epoxy cross ply laminates Y. Matsuhisa, J. King To cite this version: Y. Matsuhisa, J. King. Effects of temperature on monotonic
More informationEPITAXIAL GROWTH AND SOME PROPERTIES OF SAMARIUM CRYSTALS ON TUNGSTEN
EPITAXIAL GROWTH AND SOME PROPERTIES OF SAMARIUM CRYSTALS ON TUNGSTEN A. Ciszewski, A. Melmed To cite this version: A. Ciszewski, A. Melmed. EPITAXIAL GROWTH AND SOME PROPERTIES OF SAMAR- IUM CRYSTALS
More informationHeat line formation during roll-casting of aluminium alloys at thin gauges
Heat line formation during roll-casting of aluminium alloys at thin gauges M. Yun, J. Hunt, D. Edmonds To cite this version: M. Yun, J. Hunt, D. Edmonds. Heat line formation during roll-casting of aluminium
More informationEffect of the Hydrogen Induced Degradation of Steel on the Internal Friction Spectra
Effect of the Hydrogen Induced Degradation of Steel on the Internal Friction Spectra E. Lunarska, Y. Ososkov, Y. Jagodzinski To cite this version: E. Lunarska, Y. Ososkov, Y. Jagodzinski. Effect of the
More informationCHARACTERISTICS OF FERRITE ELECTRODES
CHARACTERISTICS OF FERRITE ELECTRODES S. Wakabayashi, T. Aoki To cite this version: S. Wakabayashi, T. Aoki. CHARACTERISTICS OF FERRITE ELECTRODES. Journal de Physique Colloques, 1977, 38 (C1), pp.c1-241-c1-244.
More informationSilicon carbonitrides - A novel class of materials
Silicon carbonitrides - A novel class of materials H. Schönfelder, F. Aldinger, R. Riedel To cite this version: H. Schönfelder, F. Aldinger, R. Riedel. Silicon carbonitrides - A novel class of materials.
More informationStructure/property relationships in HSLA steel with low carbon and manganese and increased silicon content
Structure/property relationships in HSLA steel with low carbon and manganese and increased silicon content A. Köthe, J. Richter, A. Güth, B. Müsgen, H. Baumgardt To cite this version: A. Köthe, J. Richter,
More informationPressure effects on the solubility and crystal growth of α-quartz
Pressure effects on the solubility and crystal growth of α-quartz F. Lafon, G. Demazeau To cite this version: F. Lafon, G. Demazeau. Pressure effects on the solubility and crystal growth of α-quartz. Journal
More informationPowder metallurgical processing of a SiC particle reinforced Al-6wt.%Fe alloy
Powder metallurgical processing of a SiC particle reinforced Al-6wt.%Fe alloy G. Staniek, F. Lehnert, M. Peters, W. Bunk, W. Kaysser To cite this version: G. Staniek, F. Lehnert, M. Peters, W. Bunk, W.
More informationCVD COATING OF CERAMIC LAYERS ON CERAMIC CUTTING TOOL MATERIALS
CVD COATING OF CERAMIC LAYERS ON CERAMIC CUTTING TOOL MATERIALS R. Porat To cite this version: R. Porat. CVD COATING OF CERAMIC LAYERS ON CERAMIC CUTTING TOOL MATERIALS. Journal de Physique IV Colloque,
More informationPrecipitation mechanisms and subsequent hardening kinetics in the β-cez alloy
Precipitation mechanisms and subsequent hardening kinetics in the β-cez alloy Y. Combres, J. Bechet, A. Vassel To cite this version: Y. Combres, J. Bechet, A. Vassel. Precipitation mechanisms and subsequent
More informationKPY 12 - A PRESSURE TRANSDUCER SUITABLE FOR LOW TEMPERATURE USE
KPY 12 - A PRESSURE TRANSDUCER SUITABLE FOR LOW TEMPERATURE USE F. Breimesser, L. Intichar, M. Poppinger, C. Schnapper To cite this version: F. Breimesser, L. Intichar, M. Poppinger, C. Schnapper. KPY
More informationLASER PROCESSING OF METAL-CERAMIC COMPOSITE MULTILAYERS
LASER PROCESSING OF METAL-CERAMIC COMPOSITE MULTILAYERS A. Schüssler, K.-H. Zum Gahr To cite this version: A. SchÜssler, K.-H. Zum Gahr. LASER PROCESSING OF METAL-CERAMIC COMPOS- ITE MULTILAYERS. Journal
More informationELLIPSOMETRY OF NICKEL-OXIDES AND -HYDROXIDES IN ALKALINE ELECTROLYTE
ELLPSOMETRY OF NCKEL-OXDES AND -HYDROXDES N ALKALNE ELECTROLYTE W. Visscher To cite this version: W. Visscher. ELLPSOMETRY OF NCKEL-OXDES AND -HYDROXDES N ALKA- LNE ELECTROLYTE. Journal de Physique Colloques,
More informationINTERDIFFUSION OF Au/Ni/Cr ON SILICON SUBSTRATE
INTERDIFFUSION OF Au/Ni/Cr ON SILICON SUBSTRATE B. Yan, D. Lin, D. Mao To cite this version: B. Yan, D. Lin, D. Mao. INTERDIFFUSION OF Au/Ni/Cr ON SILICON SUBSTRATE. Journal de Physique Colloques, 1988,
More informationA new method of making metal matrix fibre reinforced materials
A new method of making metal matrix fibre reinforced materials J. Schaupp, R. Prümmer To cite this version: J. Schaupp, R. Prümmer. A new method of making metal matrix fibre reinforced materials. Journal
More informationLONG-RANGE ICOSOHEDRAL SYMMETRY IN A METALLIC PHASE OBSERVED BY FIELD ION MICROSCOPY
LONG-RANGE ICOSOHEDRAL SYMMETRY IN A METALLIC PHASE OBSERVED BY FIELD ION MICROSCOPY A. Melmed, R. Klein To cite this version: A. Melmed, R. Klein. LONG-RANGE ICOSOHEDRAL SYMMETRY IN A METALLIC PHASE OBSERVED
More informationHIGH DAMPING IN GREY CAST IRON
HIGH DAMPING IN GREY CAST IRON P. Millet, R. Schaller, W. Benoit To cite this version: P. Millet, R. Schaller, W. Benoit. HIGH DAMPING IN GREY CAST IRON. Journal de Physique Colloques, 1985, 46 (C10),
More informationThe Effect of Nitrogen on Martensite Formation in a Cr-Mn-Ni Stainless Steel
The Effect of Nitrogen on Martensite Formation in a Cr-Mn-Ni Stainless Steel T. Biggs, R. Knutsen To cite this version: T. Biggs, R. Knutsen. The Effect of Nitrogen on Martensite Formation in a Cr-Mn-
More informationPHOTOCONDUCTIVITY IN a-si : H AND a-sixc1-x : H, CORRELATION WITH PHOTOLUMINESCENCE RESULTS
PHOTOCONDUCTIVITY IN a-si : H AND a-sixc1-x : H, CORRELATION WITH PHOTOLUMINESCENCE RESULTS D. Caffier, M. Le Contellec, J. Richard To cite this version: D. Caffier, M. Le Contellec, J. Richard. PHOTOCONDUCTIVITY
More informationAPFIM AND FEM STUDY OF Mo-La ALLOY WIRE
APFIM AND FEM STUDY OF Mo-La ALLOY WIRE Zhao-Xiang Zhang, Jin-Tang Jiao, De-Qing Hu To cite this version: Zhao-Xiang Zhang, Jin-Tang Jiao, De-Qing Hu. APFIM AND FEM STUDY OF Mo- La ALLOY WIRE. Journal
More informationSimulation of Dislocation Dynamics in FCC Metals
Simulation of Dislocation Dynamics in FCC Metals Y. Kogure, T. Kosugi To cite this version: Y. Kogure, T. Kosugi. Simulation of Dislocation Dynamics in FCC Metals. Journal de Physique IV Colloque, 1996,
More informationSecondary recrystallization of oxide dispersion strengthened ferritic alloys
Secondary recrystallization of oxide dispersion strengthened ferritic alloys H. Regle, A. Alamo To cite this version: H. Regle, A. Alamo. Secondary recrystallization of oxide dispersion strengthened ferritic
More informationCarbon-free sliding interface in sol-gel processed SiC Nicalon fiber-refractory oxyde matrix composites
Carbon-free sliding interface in sol-gel processed SiC Nicalon fiber-refractory oxyde matrix composites E. Bruneton, Ph. Colomban, D. Michel To cite this version: E. Bruneton, Ph. Colomban, D. Michel.
More informationTHE INTERPRETATION OF ELECTRON DIFFRACTION PATTERNS FROM Ni-Al MARTENSITE
THE INTERPRETATION OF ELECTRON DIFFRACTION PATTERNS FROM Ni-Al MARTENSITE M. Chandrasekaran, L. Delaey To cite this version: M. Chandrasekaran, L. Delaey. THE INTERPRETATION OF ELECTRON DIFFRACTION PAT-
More informationSintering behaviour of CeO2-Gd2O3 powders prepared by the oxalate coprecipitation method
Sintering behaviour of CeO2-Gd2O3 powders prepared by the oxalate coprecipitation method P. Duran, J. Jurado, C. Moure To cite this version: P. Duran, J. Jurado, C. Moure. Sintering behaviour of CeO2-Gd2O3
More informationComputerized simulation of thermal behaviour during forging sequences
Computerized simulation of thermal behaviour during forging sequences S. Hollard, J.-L. Noyes To cite this version: S. Hollard, J.-L. Noyes. Computerized simulation of thermal behaviour during forging
More informationELECTRONIC PROPERTIES OF SILICON INTERFACES PREPARED BY DIRECT BONDING
ELECTRONIC PROPERTIES OF SILICON INTERFACES PREPARED BY DIRECT BONDING S. Bengtsson, O. Engström To cite this version: S. Bengtsson, O. Engström. ELECTRONIC PROPERTIES OF SILICON INTERFACES PRE- PARED
More informationImpact of cutting fluids on surface topography and integrity in flat grinding
Impact of cutting fluids on surface topography and integrity in flat grinding Ferdinando Salvatore, Hedi Hamdi To cite this version: Ferdinando Salvatore, Hedi Hamdi. Impact of cutting fluids on surface
More informationDIFFICULTIES IN GRAIN REFINING ALUMINUM LITHIUM ALLOYS USING COMMERCIAL Al-Ti AND Al-Ti-Bor MASTER ALLOYS
DIFFICULTIES IN GRAIN REFINING ALUMINUM LITHIUM ALLOYS USING COMMERCIAL Al-Ti AND Al-Ti-Bor MASTER ALLOYS L. Labarre, R. James, J. Witters, R. O Malley, M. Emptage To cite this version: L. Labarre, R.
More informationPhysical properties of epoxy and free volume evaluated by positron annihilation spectroscopy
Physical properties of epoxy and free volume evaluated by positron annihilation spectroscopy T. Okada, S. Nishijima, Y. Honda, Y. Kobayashi To cite this version: T. Okada, S. Nishijima, Y. Honda, Y. Kobayashi.
More informationDensification superficielle de matériaux poreux par choc laser
Densification superficielle de matériaux poreux par choc laser D. Zagouri, J.-P. Romain, Blanche Dubrujeaud, Michel Jeandin To cite this version: D. Zagouri, J.-P. Romain, Blanche Dubrujeaud, Michel Jeandin.
More informationBonding of aluminium matrix composites for application in the transport industry
Bonding of aluminium matrix composites for application in the transport industry A. Ureña, J.M. Gómez de Salazar To cite this version: A. Ureña, J.M. Gómez de Salazar. Bonding of aluminium matrix composites
More informationDISLOCATION RELAXATION IN HIGH PURITY POLYCRYSTALLINE ALUMINUM AT MEGAHERTZ FREQUENCIES
DISLOCATION RELAXATION IN HIGH PURITY POLYCRYSTALLINE ALUMINUM AT MEGAHERTZ FREQUENCIES M. Zein To cite this version: M. Zein. DISLOCATION RELAXATION IN HIGH PURITY POLYCRYSTALLINE ALU- MINUM AT MEGAHERTZ
More informationLOW CARBON AND SILICON STEEL QUADRUPOLE MAGNETS
LOW CARBON AND SILICON STEEL QUADRUPOLE MAGNETS H. Fukuma, N. Kumagai, Y. Takeuchi, K. Endo, M. Komatsubara To cite this version: H. Fukuma, N. Kumagai, Y. Takeuchi, K. Endo, M. Komatsubara. LOW CARBON
More informationEvolution of the porous volume during the aerogel-glass transformation
Evolution of the porous volume during the aerogel-glass transformation T. Woignier, J. Quinson, M. Pauthe, M. Repellin-Lacroix, J. Phalippou To cite this version: T. Woignier, J. Quinson, M. Pauthe, M.
More informationATOM PROBE STUDY OF A Ti-10V-2Fe-3Al ALLOY : PRELIMINARY RESULTS
ATOM PROBE STUDY OF A Ti-10V-2Fe-3Al ALLOY : PRELIMINARY RESULTS L. Hadjadj, A. Menand, C. Martin To cite this version: L. Hadjadj, A. Menand, C. Martin. ATOM PROBE STUDY OF A Ti-10V-2Fe-3Al ALLOY : PRELIMINARY
More informationSelecting the components of composites
Selecting the components of composites M. Ashby To cite this version: M. Ashby. Selecting the components of composites. Journal de Physique IV Colloque, 1993, 03 (C7), pp.c7-1595-c7-1600. .
More informationMICROSTRUCTURE OF HARD FERRITES AND THEIR MAGNETIC PROPERTIES
MICROSTRUCTURE OF HARD FERRITES AND THEIR MAGNETIC PROPERTIES F. Esper To cite this version: F. Esper. MICROSTRUCTURE OF HARD FERRITES AND THEIR MAGNETIC PROPERTIES. Journal de Physique Colloques, 1977,
More informationMetal-ceramic joining by laser
Metal-ceramic joining by laser J. Pelletier, M. Robin To cite this version: J. Pelletier, M. Robin. Metal-ceramic joining by laser. Journal de Physique IV Colloque, 1993, 03 (C7), pp.c7-1061-c7-1064. .
More informationATOM-PROBE ANALYSIS OF ZIRCALOY
ATOM-PROBE ANALYSIS OF ZIRCALOY H. Andren, L. Mattsson, U. Rolander To cite this version: H. Andren, L. Mattsson, U. Rolander. ATOM-PROBE ANALYSIS OF ZIRCALOY. Journal de Physique Colloques, 1986, 47 (C2),
More informationIDENTIFICATION OF AN ORDERED HEXAGONAL BeFe PHASE
IDENTIFICATION OF AN ORDERED HEXAGONAL BeFe PHASE M. Miller, M. Burke To cite this version: M. Miller, M. Burke. IDENTIFICATION OF AN ORDERED HEXAGONAL BeFe PHASE. Journal de Physique Colloques, 1988,
More informationDrum- and -Disc-Engine with Shape Memory Wires
Drum- and -Disc-Engine with Shape Memory Wires F.-U. Glasauer, I. Müller To cite this version: F.-U. Glasauer, I. Müller. Drum- and -Disc-Engine with Shape Memory Wires. Journal de Physique IV Colloque,
More informationBRIDGMAN GROWTH AND PROPERTIES OF LuAlO3-Nd3+ LASER CRYSTALS
BRIDGMAN GROWTH AND PROPERTIES OF LuAlO3-Nd3+ LASER CRYSTALS A. Petrosyan To cite this version: A. Petrosyan. BRIDGMAN GROWTH AND PROPERTIES OF LuAlO3-Nd3+ LASER CRYSTALS. Journal de Physique IV Colloque,
More informationPROPERTIES OF Fe-Cr-Ni-Mn-Si (-Co) SHAPE MEMORY ALLOYS
PROPERTIES OF Fe-Cr-Ni-Mn-Si (-Co) SHAPE MEMORY ALLOYS Y. Moriya, H. Kimura, S. Ishizaki, S. Hashizume, S. Suzuki, H. Suzuki, T. Sampei To cite this version: Y. Moriya, H. Kimura, S. Ishizaki, S. Hashizume,
More informationNANOINDENTATION-INDUCED PHASE TRANSFORMATION IN SILICON
NANOINDENTATION-INDUCED PHASE TRANSFORMATION IN SILICON R. Rao, J.-E. Bradby, J.-S. Williams To cite this version: R. Rao, J.-E. Bradby, J.-S. Williams. NANOINDENTATION-INDUCED PHASE TRANSFORMA- TION IN
More informationSTRUCTURAL RELAXATION AND CRYSTALLIZATION OF FeB AND NiP METALLIC GLASSES FOLLOWED BY INTERNAL FRICTION AND MODULUS MEASUREMENTS
STRUCTURAL RELAXATION AND CRYSTALLIZATION OF FeB AND NiP METALLIC GLASSES FOLLOWED BY INTERNAL FRICTION AND MODULUS MEASUREMENTS S. Kiss, G. Posgay, I. Harangozó, F. Kedves To cite this version: S. Kiss,
More informationBALLISTIC PERFORATION OF POLYCARBONATE SHEET AND ITS HIGH STRAIN RATE RESPONSE
BALLISTIC PERFORATION OF POLYCARBONATE SHEET AND ITS HIGH STRAIN RATE RESPONSE N. Fleck, S. Wright, J. Liu, W. Stronge To cite this version: N. Fleck, S. Wright, J. Liu, W. Stronge. BALLISTIC PERFORATION
More informationCOMPOSITION GRADIENTS THROUGH RIBBON THICKNESS OF THE MELT SPUN AMORPHOUS Al70Fe13Si17 ALLOY
COMPOSITION GRADIENTS THROUGH RIBBON THICKNESS OF THE MELT SPUN AMORPHOUS Al70Fe13Si17 ALLOY J. Legresy, P. Sainfort, M. Audier, J. Simon, P. Guyot To cite this version: J. Legresy, P. Sainfort, M. Audier,
More informationDuctility of Ultra High Purity Copper
Ductility of Ultra High Purity Copper S. Fujiwara, K. Abiko To cite this version: S. Fujiwara, K. Abiko. Ductility of Ultra High Purity Copper. Journal de Physique IV Colloque, 1995, 05 (C7), pp.c7-295-c7-300.
More informationTHE EFFECT OF DYNAMIC LOADING ON THE STRUCTURE AND PROPERTIES OF 18G2A AND 14HNMBCu STEELS
THE EFFECT OF DYNAMIC LOADING ON THE STRUCTURE AND PROPERTIES OF 18G2A AND 14HNMBCu STEELS J. Gronostajski, W. Palczewski To cite this version: J. Gronostajski, W. Palczewski. THE EFFECT OF DYNAMIC LOADING
More informationThe microstructure evolution of Fe-Si alloys solidified in a high static magnetic field
The microstructure evolution of Fe-Si alloys solidified in a high static magnetic field Chunmei Liu, Yunbo Zhong, Tianxiang Zheng, Weili Ren, Zuosheng Lei, Zhongming Ren To cite this version: Chunmei Liu,
More informationFatigue of High Purity Copper Wire
Fatigue of High Purity Copper Wire N. Tanabe, A. Kurosaka, K. Suzuki, O. Kohno To cite this version: N. Tanabe, A. Kurosaka, K. Suzuki, O. Kohno. Fatigue of High Purity Copper Wire. Journal de Physique
More informationNon destructive observation by X-ray diffraction on a berlinite crystal
Non destructive observation by X-ray diffraction on a berlinite crystal H. Merigoux, J. Darces To cite this version: H. Merigoux, J. Darces. Non destructive observation by X-ray diffraction on a berlinite
More informationCMOS 1 MICRON ISOLATION TECHNOLOGY USING INTERFACE SEALING BY PLASMA NITRIDATION : PLASMA SILO
CMOS 1 MICRON ISOLATION TECHNOLOGY USING INTERFACE SEALING BY PLASMA NITRIDATION : PLASMA SILO P. Delpech, B. Vuillermoz, M. Berenguer, A. Straboni, T. Ternisien To cite this version: P. Delpech, B. Vuillermoz,
More informationStrength of 10CR-N martensitic steels
Strength of 10CR-N martensitic steels F. Bahrami, A. Hendry To cite this version: F. Bahrami, A. Hendry. Strength of 10CR-N martensitic steels. Journal de Physique IV Colloque, 1993, 03 (C7), pp.c7-97-c7-100.
More informationRESPONSE OF AISI TYPE 316 STAINLESS STEEL TO INTERRUPTED QUASI-STATIC TO IMPACT TENSION AT ELEVATED TEMPERATURES
RESPONSE OF AISI TYPE 316 STAINLESS STEEL TO INTERRUPTED QUASI-STATIC TO IMPACT TENSION AT ELEVATED TEMPERATURES A. Eleiche, C. Albertini, M. Montagnani To cite this version: A. Eleiche, C. Albertini,
More informationMechanism of two Way Shape Memory Effect Obtained by Stabilised Stress Induced Martensite
Mechanism of two Way Shape Memory Effect Obtained by Stabilised Stress Induced Martensite J. Guilemany, J. Fernández To cite this version: J. Guilemany, J. Fernández. Mechanism of two Way Shape Memory
More informationRELATION BETWEEN COMPOSITION, MICROSTRUCTURE AND CUTTING TOOL PERFORMANCE OF ALPHA-BETA-SiALONs
RELATION BETWEEN COMPOSITION, MICROSTRUCTURE AND CUTTING TOOL PERFORMANCE OF ALPHA-BETA-SiALONs N. Ingelström, T. Ekström To cite this version: N. Ingelström, T. Ekström. RELATION BETWEEN COMPOSITION,
More informationOn the relation between the Luders deformation and grain boundary structure in aluminium alloy
On the relation between the Luders deformation and grain boundary structure in aluminium alloy Yu. B. Timoshenko To cite this version: Yu. B. Timoshenko. On the relation between the Luders deformation
More informationElectrical properties of interlevel deposited oxides related to polysilicon preparation
Electrical properties of interlevel deposited oxides related to polysilicon preparation C. Cobianu, O. Popa, D. Dascalu To cite this version: C. Cobianu, O. Popa, D. Dascalu. Electrical properties of interlevel
More informationLow-shrinkage refractories bonded with high-alumina cement mixed with colloidal silica
Low-shrinkage refractories bonded with high-alumina cement mixed with colloidal silica N. Richard, N. Lequeux, P. Boch To cite this version: N. Richard, N. Lequeux, P. Boch. Low-shrinkage refractories
More informationCHARACTERIZATION OF POLYCRYSTALLINE SILICON BY EBIC
CHARACTERIZATION OF POLYCRYSTALLINE SILICON BY EBIC M. Kittler, J. Lärz, G. Morgenstern, W. Seifert To cite this version: M. Kittler, J. Lärz, G. Morgenstern, W. Seifert. CHARACTERIZATION OF POLYCRYS-
More informationHYDROGEN SEGREGATION AND DIFFUSION AT GRAIN BOUNDARIES
HYDROGEN SEGREGATION AND DIFFUSION AT GRAIN BOUNDARIES H. Birnbaum, B. Ladna, A. Kimura To cite this version: H. Birnbaum, B. Ladna, A. Kimura. HYDROGEN SEGREGATION AND DIFFUSION AT GRAIN BOUNDARIES. Journal
More informationCASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS
CASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS C. Tong, L. Yao, C. Nieh, C. Chang, S. Hsu To cite this version: C. Tong, L. Yao, C. Nieh, C. Chang, S. Hsu. CASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS.
More informationSTRUCTURES OF AMORPHOUS MATERIALS AND SPECIFIC VOLUME VARIATIONS VERSUS THE TEMPERATURE
STRUCTURES OF AMORPHOUS MATERIALS AND SPECIFIC VOLUME VARIATIONS VERSUS THE TEMPERATURE J. Sadoc, R. Mosseri To cite this version: J. Sadoc, R. Mosseri. STRUCTURES OF AMORPHOUS MATERIALS AND SPECIFIC VOLUME
More informationLASER CLADDING BY POWDER INJECTION : OPTIMIZATION OF THE PROCESSING CONDITIONS
LASER CLADDING BY POWDER INJECTION : OPTIMIZATION OF THE PROCESSING CONDITIONS M. Sahour, A. Vannes, J. Pelletier To cite this version: M. Sahour, A. Vannes, J. Pelletier. LASER CLADDING BY POWDER INJECTION
More informationSintering by infiltration of loose mixture of powders, a method for metal matrix composite elaboration
Sintering by infiltration of loose mixture of powders, a method for metal matrix composite elaboration V. Constantinescu, R. Orban, H. Colan To cite this version: V. Constantinescu, R. Orban, H. Colan.
More informationInduction hardening of small gear wheels made of steel 50CrMo4
Induction hardening of small gear wheels made of steel 50CrMo4 J Barglik, A Smalcerz, A Smagór To cite this version: J Barglik, A Smalcerz, A Smagór. Induction hardening of small gear wheels made of steel
More informationContinuous melting and pouring of an aluminum oxide based melt with cold crucible
Continuous melting and pouring of an aluminum oxide based melt with cold crucible B Nacke, V Kichigin, V Geza, I Poznyak To cite this version: B Nacke, V Kichigin, V Geza, I Poznyak. Continuous melting
More informationThe Effect of Stress Ageing on the Properties of Shape Memory Alloys
The Effect of Stress Ageing on the Properties of Shape Memory Alloys A. Michael To cite this version: A. Michael. The Effect of Stress Ageing on the Properties of Shape Memory Alloys. Journal de Physique
More informationPrediction of the energy efficiency of an Ar-H2-O2 plasma torch with Ansys Fluent
Prediction of the energy efficiency of an Ar-H2-O2 plasma torch with Ansys Fluent M Vadon, Y Delannoy, G Chichignoud To cite this version: M Vadon, Y Delannoy, G Chichignoud. Prediction of the energy efficiency
More informationEffect of grain orientation on the development of dislocation substructures during colddeformation
Effect of grain orientation on the development of dislocation substructures during cold-deformation of pure Tantalum. Link with static recrystallization and recovery. Christophe Kerisit, Nathalie Bozzolo,
More informationRecycling Technology of Fiber-Reinforced Plastics Using Sodium Hydroxide
Recycling Technology of Fiber-Reinforced Plastics Using Sodium Hydroxide K Baba, T Wajima To cite this version: K Baba, T Wajima. Recycling Technology of Fiber-Reinforced Plastics Using Sodium Hydroxide.
More informationProgress of some techniques on electromagnetic metallurgy
Progress of some techniques on electromagnetic metallurgy Engang Wang To cite this version: Engang Wang. Progress of some techniques on electromagnetic metallurgy. 8th International Conference on Electromagnetic
More informationELECTRON MICROSCOPIC OBSERVATIONS OF SMALL GOLD CLUSTERS
ELECTRON MICROSCOPIC OBSERVATIONS OF SMALL GOLD CLUSTERS K. Mihama, N. Tanaka, A. Ichimiya To cite this version: K. Mihama, N. Tanaka, A. Ichimiya. ELECTRON MICROSCOPIC OBSERVATIONS OF SMALL GOLD CLUSTERS.
More informationEXPERIMENTAL EVIDENCE OF SULFUR EFFECT ON THE PLANE AND ON THE EXTRINSIC DISLOCATIONS OF A Σ = 3 GRAIN BOUNDARY IN NICKEL
EXPERIMENTAL EVIDENCE OF SULFUR EFFECT ON THE PLANE AND ON THE EXTRINSIC DISLOCATIONS OF A Σ = 3 GRAIN BOUNDARY IN NICKEL D. Bouchet, B. Aufray, L. Priester To cite this version: D. Bouchet, B. Aufray,
More informationAtomic structure of vitreous interfacial films in sialon
Atomic structure of vitreous interfacial films in sialon A. Thorel, J. Laval, Daniel Broussaud To cite this version: A. Thorel, J. Laval, Daniel Broussaud. Atomic structure of vitreous interfacial films
More informationStabilization of Austenite Associated with Prior Formation of Martensite
Stabilization of Austenite Associated with Prior Formation of Martensite Z. Xie, Yehan Liu, H. Hänninen To cite this version: Z. Xie, Yehan Liu, H. Hänninen. Stabilization of Austenite Associated with
More informationELASTIC PRECURSOR DECAY IN CERAMICS AS DETERMINED WITH MANGANIN STRESS GAUGES
ELASTIC PRECURSOR DECAY IN CERAMICS AS DETERMINED WITH MANGANIN STRESS GAUGES Z. Rosenberg, N. Brar, S. Bless To cite this version: Z. Rosenberg, N. Brar, S. Bless. ELASTIC PRECURSOR DECAY IN CERAMICS
More informationSPECTROSCOPIC PROPERTIES AND OPERATION OF PULSED HOLMIUM LASER
SPECTROSCOPIC PROPERTIES AND OPERATION OF PULSED HOLMIUM LASER Y. Kalisky, J. Kagan, A. Brenier, C. Pedrini, G. Boulon To cite this version: Y. Kalisky, J. Kagan, A. Brenier, C. Pedrini, G. Boulon. SPECTROSCOPIC
More informationFATIGUE BEHAVIOR OF PEARLITIC S.G. CAST IRONS AFTER LASER SURFACE HEAT TREATMENTS
FATIGUE BEHAVIOR OF EARLITIC S.G. CAST IRONS AFTER LASER SURFACE HEAT TREATMENTS Y. Guan, D. antelis, D. Chambolle, S. arent-simonin, h. oupeau To cite this version: Y. Guan, D. antelis, D. Chambolle,
More informationThe Effect of Magnetic Field on Metal Anodizing Behaviour
The Effect of Magnetic Field on Metal Anodizing Behaviour T Kozuka, H Honda, S Fukuda, M Kawahara To cite this version: T Kozuka, H Honda, S Fukuda, M Kawahara. The Effect of Magnetic Field on Metal Anodizing
More informationElectrodeposition of Thin Film Cu-Zn Shape Memory Alloys
Electrodeposition of Thin Film Cu-Zn Shape Memory Alloys D. Page, S. Roy To cite this version: D. Page, S. Roy. Electrodeposition of Thin Film Cu-Zn Shape Memory Alloys. Journal de Physique IV Colloque,
More informationComparison of lead concentration in surface soil by induced coupled plasma/optical emission spectrometry and X-ray fluorescence
Comparison of lead concentration in surface soil by induced coupled plasma/optical emission spectrometry and X-ray fluorescence Roseline Bonnard, Olivier Bour To cite this version: Roseline Bonnard, Olivier
More informationMECHANICAL AND ELECTRICAL PROPERTIES OF A NiTi SHAPE MEMORY ALLOY
MECHANICAL AND ELECTRICAL PROPERTIES OF A NiTi SHAPE MEMORY ALLOY G. Airoldi, T. Ranucci, G. Riva To cite this version: G. Airoldi, T. Ranucci, G. Riva. MECHANICAL AND ELECTRICAL PROPERTIES OF A NiTi SHAPE
More informationFinite Element Model of Gear Induction Hardening
Finite Element Model of Gear Induction Hardening J Hodek, M Zemko, P Shykula To cite this version: J Hodek, M Zemko, P Shykula. Finite Element Model of Gear Induction Hardening. 8th International Conference
More informationAGGLOMERATE FORMATION, COMPACT CHARACTERISTICS AND SINTERING BEHAVIOUR OF CERAMIC POWDERS
AGGLOMERATE FORMATION, COMPACT CHARACTERISTICS AND SINTERING BEHAVIOUR OF CERAMIC POWDERS F. Dogan, A. Roosen, H. Hausner To cite this version: F. Dogan, A. Roosen, H. Hausner. AGGLOMERATE FORMATION, COMPACT
More informationCollusion through price ceilings? In search of a focal-point effect
Collusion through price ceilings? In search of a focal-point effect Dirk Engelmann, Wieland Müllerz To cite this version: Dirk Engelmann, Wieland Müllerz. Collusion through price ceilings? In search of
More informationTEMPERATURE DEPENDENCE OF MAGNETIZATION REVERSAL OF SINTERED Nd-Fe-B MAGNETS
TEMPERATURE DEPENDENCE OF MAGNETIZATION REVERSAL OF SINTERED Nd-Fe-B MAGNETS K. Kuntze, D. Kohake, R. Beranek, S. Stieler, C. Heiden To cite this version: K. Kuntze, D. Kohake, R. Beranek, S. Stieler,
More informationHigh temperature mechanical properties of AlMgZn alloys with copper and zirconium additions
High temperature mechanical properties of AlMgZn alloys with copper and zirconium additions N. Chinh, A. Juhász, P. Tasnádi, J. Lendvai, I. Kovács To cite this version: N. Chinh, A. Juhász, P. Tasnádi,
More informationFATIGUE AND CORROSION FATIGUE OF 8090 Al-Li-Cu-Mg ALLOY
FTIGUE ND CORROSION FTIGUE OF 8090 l-li-cu-mg LLOY F. Haddleton, S. Murphy, T. Griffin To cite this version: F. Haddleton, S. Murphy, T. Griffin. FTIGUE ND CORROSION FTIGUE OF 8090 l-li-cu-mg LLOY. Journal
More informationIMPROVEMENT OF THE WEIBULL MODULUS OF CERAMICS PRESSED WITH A VIBRATORY ASSISTANCE
IMPROVEMENT OF THE WEIBULL MODULUS OF CERAMICS PRESSED WITH A VIBRATORY ASSISTANCE F. Baylet, B. Rogeaux, P. Boch To cite this version: F. Baylet, B. Rogeaux, P. Boch. IMPROVEMENT OF THE WEIBULL MODULUS
More information