摘要
本文用Ｘ射线光电子谱、原子吸收谱、电化学阳极极化及细胞培养等方法研究了Ｔｉ－５０ａｔ％Ｎｉ合金的氧化膜及其对耐腐蚀性能和生物相容性的影响。研究表明，在３００℃～４００℃之间形成的氧化膜薄而致密，不影响试样的形状记忆效应，但可有效地减慢合金在１％ＮａＣｌ溶液中的Ｎｉ离子释放速度及减小阳极极化维钝电流。氧化膜的存在使合金的细胞毒性明显降低。
The therma l oxidation of Ti-50at% Ni alloy between 300℃-400℃ offers a compact thin oxide film. This oxide film on the TiNi specimens of 0.26mm thick affects little on shape recovery ratio and shape recovery temperature. The Ni concentration in oxide film is decreased with increasing oxidation temperature. The existence of this oxide film on TiNi alloy reduces effectively both passive current density of anodic polarization and release of Ni ions in saline solution.in addition.the cell culture experiment further comfirms the advantageous influence of thermal oxidation on the biocompatibility of TiNi alloy.
出处
《医用生物力学》
CAS
CSCD
1995年第2期47-50,共4页
Journal of Medical Biomechanics
基金
浙江省自然科学基金
关键词
记忆合金
生物相容性
耐腐蚀性
氧化膜
镍钛
shape memory alloy
biocompatibility
corrosion resistance
oxide film
