摘要
研究了电化学抛光时间(60、180s)对常规和超细晶TiNi合金表面形貌与生物活性的影响。结果表明,电化学抛光时间从60s增加到180s时,常规Ti-Ni合金表面纳米尺度蚀坑数量增多,但仅轻微提高了其生物活性(模拟体液中Ca-P层的生长速率),而超细晶TiNi合金表面纳米蚀坑数量大幅减少,生物活性虽大幅降低,但仍显著高于常规TiNi合金。结果表明,除了增加纳米尺度蚀坑形貌外,组织超细化也是提高生物活性的一个有效方法。
The effect of electrochemical polishing time (60, 180s) on the surface morphology and bioactivity of conventional TiNi and ultrafine-grained TiNi alloy were investigated. The results showed that with the increase of electrochemical polishing time from 60 to 180s, the conventional TiNi alloy exhibited much higher density of nano-scale corrosion pits but only a sligher higher bioactivity (growth rate of Ca-P layer in simulated body fluid), while the ultrafine-grained TiNi alloy exhibited much lower density of nano-scale corrosion pits and a much lower bioactivity but was higher than that of conventional TiNi alloy. The present results illustruate that besides the nano-scale corrosion pit morphology, the ultrafinement processing of microstructure was an effective approach to improve bioactivity.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第21期2958-2961,共4页
Journal of Functional Materials
基金
江苏省高校自然科学基金重大资助项目(11KJA430004)
江苏大学优秀学术青年骨干培养对象基金资助项目(1211110001)
关键词
超细晶TiNi
电化学抛光
表面形貌
生物活性
ultrafine-grained TiNi alloy
electrochemical polish
surface morphology
bioactivity