超细晶tini合金电化学抛光表面的生物相容性

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1、------------------------------------------------------------------------------------------------超细晶TiNi合金电化学抛光表面的生物相容性第?23?卷第?7?期Vol.23?No.7?中国有色金属学报?The?Chinese?Journal?of?Nonferrous?Metals?2013?年?7?月?July2013?文章编号：1004-0609(2013)07-1931-06?超细晶?TiNi?合金电化学抛光表面的生物相容性许晓静，张体峰，凌智勇，盛新兰，刘敏

2、，牛小丫，朱利华?(江苏大学先进制造与现代装备技术工程研究院，镇江?212013)?摘要：采用电化学抛光工艺对常规?TiNi?合金和超细晶?TiNi?合金的表面进行改性，分析经电化学抛光后其表面形貌、耐腐蚀性能、微动摩擦磨损性能和生物活性。结果表明：与常规?TiNi?合金电化学抛光表面相比，超细晶?TiNi合金电化学抛光表面具有更多的小尺寸(纳米尺度)蚀坑、更优的抗模拟体液电化学腐蚀性能(后者的腐蚀速率是前者的1/5)、更小的摩擦因数、更好的耐磨性以及更高的生物活性(后者在模拟体液中Ca?P层的生长速率是前者的2.8倍)。分析认为，以上性能变化是TiNi合金组织

3、超细化使其晶体缺陷增多所致。关键词：超细晶TiNi合金；电化学抛光；表面形貌；耐腐蚀性能；微动摩擦磨损性能；生物活性中图分类号：TG?174.4?文献标志码：A?——————————————————————————————————————------------------------------------------------------------------------------------------------Biocompatibility?of?electrochemical?polished?ultrafine-grained?TiNi?a

4、lloy?XU?Xiao-jing,?ZHANG?Ti-feng,?LING?Zhi-yong,?SHENG?Xin-lan,?LIU?Min,?NIU?Xiao-ya,?ZHU?Li-hua?(Engineering?Institute?of?Advanced?Manufacturing?and?Modern?Equipment?Technology,?Jiangsu?University,?Zhenjiang?212013,?China)?Abstract:?The?surfaces?of?conventional?and?ultrafine-grained

5、?TiNi?alloys?were?modified?by?the?electrochemical?polishing?process.?The?surface?morphology,?corrosion?resistance,?fretting?friction?and?wear?properties?and?bioactivity?of?electrochemical?polished?surface?on?conventional?TiNi?alloy?and?ultrafine-grained?TiNi?alloy?were?investigated.?

6、The?results?show?that,?compared?with?the?electrochemical?polished?surface?of?conventional?TiNi?alloy,?the?electrochemical?——————————————————————————————————————------------------------------------------------------------------------------------------------polished?surface?of?ultrafin

7、e-grained?TiNi?alloy?has?more?nano-scale?corrosion?pits,?better?corrosion?resistance?(the?corrosion?rate?of?the?latter?is?1/5?of?that?of?the?former)?in?the?Kokubo?simulated?body?fluid,?lower?friction?coefficient,?better?wear?resistance?and?higherbioactivity?(the?growth?rate?of?Ca?P?l

8、ayer?immerse