FRICTION AND WEAR PROPERTIES OF Ni FREE Zr BASED BULK METALLIC GLASSES IN SIMULATED BODY FLUID

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1 46 6 Vol.46 No µ 6 Ì ACTA METALLURGICA SINICA Jun pp Ni Ó Ì¹ Æ ÄÌг Á É Ã ÕÔØ Ù Ú Ö ( ÐÅ ½ÕÀ  ū, Ì ) Í /Cu Å Ý Æ Å 70 mm 12 mm 1.5 mm Ð Æ Ni Zr 60Cu 19Fe 5Al 10Ti 6 Ê ¾. SRV» ßÃ Ó ÝÊ ¾ ½» Ü PBS ³ º л «. ÑÓÊ ¾ Ð Ð. SEM EDS ÓÊ ¾ Å Á. È, PBS º, Ê ¾ Ð ßÝ µđ ³Ñ Æ ØÙÐ Å. ¼ ² ÝÊ ¾, PBS º,» Î º TG È A (2010) FRICTION AND WEAR PROPERTIES OF Ni FREE Zr BASED BULK METALLIC GLASSES IN SIMULATED BODY FLUID HUANG Caiyun, CHEN Qi, LIU Lin The State Key Laboratory of Material Processing and Die & Mould Technology, Deportment of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan Correspondent: CHEN Qi, Tel: (027) , Fax: (027) , gemcq@smail.hust.edu.cn Supported by Specialized Research Fund for the Doctoral Program of Higher Education (No ), Huazhong University of Science and Technology Innovation Research Fund (No.C2009Z018J) and The Tribology Science Fund of State Key Laboratory of Tribology Manuscript received , in revised form ABSTRACT In the last decade, bulk metallic glasses (BMGs) emerge as a new class of metallic materials with disordered atomic structure. Especially, Zr based BMGs have attracted an increasing attention due to their distinct properties including ultrahigh strength, high elastic strain limit, relatively low Young s modulus ( GPa) and easy forming ability in viscous state. In addition, Zr based BMGs displayed a superior corrosion resistance in artificial body fluids and a satisfactory biocompatibility. The combination of these unique properties makes them extremely promising for biomedical applications. The most promising applications for the BMGs are in dentistry and orthopaedics due to their mechanical superiority, where friction and wear properties are clinically important for the performance of the implants in the body. In the present study, a Ni free BMG plate of Zr 60 Cu 19 Fe 5 Al 10 Ti 6 with dimensions of 70 mm 12 mm 1.5 mm was successfully prepared by water cooled copper mold casting. The friction and wear characteristics of the BMG under sliding in dry air, distilled water and phosphate buffered saline (PBS) have been investigated on a SRV friction and wear tester in a ball on plate contact configuration where the upper ball in motion was made of zirconia with 10 mm diameter and the lower stationary plate was made of the BMG. Ti6Al4V alloy was also tested under the same condition for comparison. The wear depth was investigated by a surface profiler and the wear * Å ß Æ ÙÝ Ù , Æ Ð Đ Ý Ù C2009Z018J Ä Ð» Æ Æ Ý Ù ÚÊ : , Ú» : ³ : Ø Î, º, 1981 Û, DOI: /SP.J

2 682 µ 46 volume was also calculated The surface morphologies and the component of wear debris were examined by SEM and EDS Compared with the Ti alloy, the BMG exhibits much less volume loss in the PBS solution, demonstrating that the BMG has a better wear resistance than the Ti alloy, though the former has a larger friction coefficient. The wear mechanism of the BMG is dominated by the corrosion wear with oxidation of the surface and fatigue flake mechanism. KEY WORDS Zr based bulk metallic glass, PBS simulated body fluid, friction and wear ÁÓ Å 90 Ó Ë (bulk metallic glass, BMG) «¼ ¾Ö, Đ Þ À ± ± ± ÂÂÆ ¼Ó Ü ¾Ö. «Þ ¼ Ê»¼Ê ² Â, ¾Ö. ½, ¾Ö ± Ü ¼ Ò Ù «[1]. ÊÌ ¹ ¼Ó«Ø ÜÖ [2,3]. ¹ Ü Ç± Ü Û Ü,, Ü ¼, ÙÚ ¹  ß., ÁÜ ¾ Ö, ¹ È Í Ü, Â Ü Ó Đ Â ¹.», Á ÞË ¼ ¹ Æ «Æ± ¾Ö ¼ ¹ Æ [4 8],  Р¾ ¼,» Ð ¼ ¹ Õ [9], ÞË Ü»Đ ¼ ¹ Æ ÔÈ Ü. ÒË ÆÜ ¾Ö ÁÙ ½ ÚÄ, º Ü ¼. Ò Þ Ë Â Đ Ë Be Ni Æ,, À ËÛÕË Æ Á ÆÔ Ü ¾Ö «. Î À Ni Zr 60 Cu 20 Fe 5 Al 10 Nb 5 Ë ÞÏ Ó [10], ÆÔ Â, Ti Öà Nb Þ Ô Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ë, ± ¾ Ý PBS(س ÔÉ») Ð ¼ ¹ ± ¹µ «Â º Ô, ±Ã ½ Ü ¾Ö Ti6Al4V, ½ ¹. 1 Ç Zr (99.8%), Cu (99.999%), Fe (99.999%), Al (99.999%) Ti (99.99%) È ¾ Zr 60 Cu 19 Fe 5 Al 10 Ti 6, Ar Đ Ð Â Ï «Å. Æ Â Ï, Ð 4 6. ÐÍ «Å, Cu «ÞßÇ Æ 70 mm 12 mm 1.5 mm. µ «ÁÍ µ, Philips Ü χ Pert PRO X ÖÖ Ö (XRD) µ ± º ; Perkin Elmer Ü DSC7 Ð Ò (DSC) º, Ý̱ Æ 20 K/min. ÖÁ «¼ µá ÂÇ Æ 15 mm 10 mm 1.5 mm Ë, µ «¾ Æ 180, 240, 600, Î Ò, 0.5 µm ¼Áص «R a Æ µm. ± µ Ù ³Å 15 min, ÎÎ «, ¾. ¼ ¹ ± ÞÇ OPTIMOL SRV Ì ¼ ¹ ± Óº, Ç «. ¼ Ó ZrO 2 ¾ Ç, ÇÓ Æ 10 mm, Æ G5. Æ «µ»ó BMG µ. ±, Ó Á¹, «, ¼ ¼ ±. ± : Û Æ N, É ³ÕÆ 1.5 mm, Æ 10 Hz, ± ÆÆ 5 min; ± ¹ 3. ± Ñ Ó Ý PBS», PBS» ¾ Æ 8 g/l NaCl+ 0.2 g/l KCl+0.14 g/l NaH 2 PO g/l KH 2 PO 4, ph ÕÆ 7.4. ¹ ±±, µ»đ Ù Å 5 min ÎÎ «º. Talysurf 5P 120 «Ò ¹ µ ««Ø, Ê ¹, Đ «3 ÉÜÍÕ, Í Õ [11]. Í 3, ºß ¹ Í Õ. Ò± (EDS) CSM950 Ð Ñà (SEM) ¹ µ «¹  º. Ç BUCHLER III Ñà «¼ ± µ «Vickers. 2 Ç ½ Ë 2.1 BMG XRD DSC ¾ 1 ««Zr 60 Cu 19 Fe 5 Al 10 Ti 6 µ XRD. ±É ºÞ Þ ÆÔ¼. DSC ÌÖ «² Ì T g Æ 385, ÒÌ T x Æ 451, Ê»¼ÊÍ Æ 66 ( 1 Đ ). 2.2 BMG Í Ñ Â ÀÊ 2 «Û Æ 20 N Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ë ¾ Ý PBS» Ð ¼ µ Æ ÒÌÖ. Ç ÁÍ, Ë È Đ ¾ ¼ ÌÖ³ Ñ, ¼ ËÆ Ý Đ PBS»Đ ¼ ÌÖ, Ë ¼ ÂĐ ³, ̱Ýؼ «Õ,

3 6 ÍĐ : Ni ÜÉ ½ Ú ² ¹Ð º Å 683 º «¹ ¼ Æ , Ö«BMG PBS»Đ ¼ÌÖ Ð, PBS» BMG ÐÐÉ Ý Í. Ò BMG ¾ Ý PBS» Ð ¹ Ò, Ý PBS»Đ BMG ¹ Ñ, È Đ ¹ ËÆ 2» Đ 6. BMG È Đ ÜÔ ¹. 2.3 BMG Ò PBS Å Ñ ÀÊ µ 3 «Û Æ N Zr 60 Cu 19 - Fe 5 Al 10 Ti 6 Ë Ti6Al4V PBS» Ð ¼ µ Æ ÒÌÖ. Ç ÁÍ, BMG Ë ¼ Đ, µ Æ, ¼ ºÓÝ, µ ±º «¹, ÌÖ Ð. ¼ ß. Æ N «¼ Õ Æ , ¼ µ Þ, ¼ÂÐ Intensity, a.u. Exothermic Temperature, o C , deg Ï 1 Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾ Ð XRD ( Å DSC ËÕ) Fig.1 XRD pattern of Zr 60 Cu 19 Fe 5 Al 10 Ti 6 alloy, the inset Cofficient of friction T g T x Zr 60 Cu 19 Fe 5 Al 10 Ti 6 shows the DSC curve (T g is glass transition temperature, T x is crystallization temperature) In distilled water In PBS In air Time, s Ï 2 ÏÅ 20 N Ð Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾ µ ³ß л Fig.2 The friction coefficient of Zr 60 Cu 19 Fe 5 Al 10 Ti 6 alloy in different media under a load of 20 N ¼ Ú «Ð [12]. ÁÖ, Á «Á Ö ¼, ¼ µ Þ. ±, ¼ Æ ÞÁ BMG, Õ«¼ ÌÖ³ Ñ. ¼ ¼ µ Ñ Þ ÉÅ, Õ«Þ³ Ê ÞÁ. Ò BMG Ti6Al4V PBS»Đ ¹ Ò, µ Û Ñ, BMG ¹ Æ º., BMG ¹ ÊÞÁ. Æ N, BMG ¹ Õ 82% 78%. R W = SN/V [13] W ( Đ, V W Æ ¹, S ÆÐ, N Æ, R W Æ ) ÇÑ, ¹ ±ÊÍÁ. 2.4 ÀÊ» 4 «Æ 20 N Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ë PBS» Ð «( ÓÁ ¼ Û Đ¹). Ç ÁÍ, ÑÑÁ BMG, Â É Coefficient of friction BMG-20 N BMG-30 N Ti6Al4V-20 N Ti6Al4V-30 N Time, s Ï 3 ÏÅ N Ð Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾ Ti6Al4V PBS º л Fig.3 The friction coefficient of Zr 60 Cu 19 Fe 5 Al 10 Ti 6 alloy Wear scar depth, m and Ti6Al4V in PBS under loads of 20 and 30 N 0 BMG Ti6Al4V Distance, m Ï 4 ÏÅ 20 N Ð Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾ PBS º Ð Å Fig.4 Lines scan across the scar showing the profile of both alloys scar in PBS under a load of 20 N

4 ) m,,^ 0 R K x p&, fk B 0 g T r ' m -8 ~6 ~ 4ks?. BMG ~ ` Y Il, G QB C ~ nx, BMG ^ 0 R K J& ~ % h H, < a 0 T r' z -8~q. D 5a Z b $!NS8!3,^ PBS / ~ 6 j ~ ` D (D AN 0 w). D 5a O 7I U, ) 8 - $ ^m 0 `,0, > - GE n x, ag,! 0 wg h~a `..0+ mf, ^m -` G m n ~ sw, sw w ^ oi 0 w, 0 ` ~ QG, s ~ ` Z hz ~ 8 z, ^ 0 ` Z P 0 `,0 ~ EGh ~ a `, e D 5b.. EDS $ b, ^m ~ S G ah ~ O % (D 5c), \ ^m `,0 ~, O S na a (D 5d), ^ 0~ R K,! 3 x J p0 < O S n 6 ~ 0<,, (n`v `. FI!3, S pm nk( H~N$ e: Zr, Ti, Al, 0RK 2` O< H ~ l ad 8K PBS / ~ $ & ~ O t';b?, xjs(n `. Fu L p z S8! 3,^gP Z P D ~ l 0 N, n^p D, C x p_" ~ S O n a6 ~ 0 <, ^gp ~!3, W G. Jin : x 684 [14] [8] W5 Zr60 Cu19 Fe5 Al10 Ti6 46 C p_"~%q, zs8!3,^pd ~ 0uv x ( n. FI(n`A 6Jf, ^2`O 0+~* a y Cj, ad8cxsw, ) sw~b ZW, 0 < e,;uve. E ~ ~^)e ~ 0,, J < hz ~ ~. ) ~b, P % ~/ U 0 ~ ~ Ps g % ~ -, J a. < a, BMG ~ - d * FI) 8 ^ 0 R K ( n_j~(n -7 ( n <~ E ~ ^ _ J~ g -. D 6 N Zr Cu Fe Al Ti S8!3,^jy Z2 jl; j~ `. D 6a O, BMG ^ jy Z PBS (D 5a) ~ `4ks", )8 `,0 G ^m ~ 0 ` %U np, EDS $ b B N S O n 6 ~ v ( n `,! 3,^jy ~ - dk^ PBS s?. D 6b N!3,2 ; j~ `. Kjy Z PBS ( js, )8 ~ `< d9, a m, QG m&, >-G pnx. 0 NVj, BMG ^ T; j w G h C d 8 x f s, q G Vo Æ x ^2 0~RK! 3, uu n&. Ishida xpf-zs8!3,zj~k M ^: [14 16] [17] R7 2\+ PBS b.~} _ CY _ EDS = Fig.5 Low (a) and high (b) magnified SEM images of the wear scar on BMG, and EDS spectra of the regions marked as A (c) and B (d) in Fig.5b, arrow in Fig.5a shows the friction direction

5 6 ÍĐ : Ni ÜÉ ½ Ú ² ¹Ð º Å 685 Ï 6 Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾ Ü ½ Ð Fig.6 The wear scar of BMG in distilled water (a) and in air (b) ¼Đ ¹ Ê Á Æ, ¹ «ÍÒÔ², Ä ¼Đ, ¹ Á Æ, «È ². «Æ ÁÄ ¼, ¼ÊÃĐ ÜÄ ¼, ¼ ² ܲ, ² ± «¹. ±Đ, Á» Ï, ¼ «Ì Ä, ¼ º¾ Ç Ý, ¼ «Ü², ÍÒÔ Ø, ¹ Â Ô ¹ Ñ, DZ«Â¾ Æ Î ¼ ³ Ñ È Ò¼., È»Í, ¼ «È ± ¹, Û¼ «Ç ÛÄÇ, ¼ Þ. Ê ¼ ÆÇ ÁÍ, ØË ¹ «¼ÊÃĐ Ü ¼ ÙÚ «Ü Ò, Ü Ò Â ¹. ÆÔ ¼ÊÃĐ¾Ö ± «² ÜÔ Ò, µ «¼ Ñà º Ô. «Õ ¼ 321 HV Æ 386 HV, ÒÍ Ò. «Ñà ¼ 429 HV Æ ¼ 401 HV, ÒÆ Ò. 7 Æ ¼ ± «. Ç ÁÍ, ¼ BMG «Ê ÄÍÒÔ Ï 7 Zr 60 Cu 19 Fe 5 Al 10 Ti 6 Ê ¾» Ð Fig.7 SEM images of the indentation before (a) and after (b) wear testing on the BMG under a load of 30 N Ñ ÁÒ, Ⱥ ¼ ± µ «È Û ÁÒ Ü, ¼±Éº¼ Ð Ô BMG ¼ÊÃ Đ ÜÔ Ò. ÎÓ [18,19] Ü, È Đ ¼, Đ ÒÔ Ï ÁÒ. Fu [14] ± ± ±É Æ, Þ ¼ ÊÃĐ ¼ «ÜÔ¼ Ò, Õ, Ò Þ«Á ¼ÊÃĐÁ ÀÙ ÜÑÒ Â. 3 (1) ÞË ¼ µ Þ, ¹ µ Ñ Ñ. ¼ÊÃĐ ¼ «Ù Ü ÒÒÜ. (2), ÞË ¼ Á, Õ«Ë ¹ ÊÞÁ, Ë ¹ ±ÊÍÁ. (3) ÞË Ý PBS»Đ ¹ Ñ, ¹ÞÐ ÞÆ Ò ¹ Ò ÙÚ ¹Æ ; È Đ ¹ ËÆ Ý PBS»Đ 6, ¹ ÞÆ ¹± ².

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