Carbon plasma immersion ion implantation of nickel-titanium shape memory alloys.
Carbon plasma immersion ion implantation of nickel-titanium shape memory alloys.
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DOI：
10.1016/j.biomaterials.2004.07.056
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发表时间：
2005-05
期刊：
影响因子：
14
通讯作者：
R. Poon;K. Yeung;Xuanyong Liu;P. Chu;C. Chung;W. Lu;K. Cheung;D. Chan
中科院分区：
文献类型：
--
作者：
R. Poon;K. Yeung;Xuanyong Liu;P. Chu;C. Chung;W. Lu;K. Cheung;D. Chan
镍钛（NiTi）形状记忆合金除了具有众所周知的形状记忆效应之外还具有超弹性，并且潜在地适用于骨科植入物。然而，一个关键的问题是有害的镍离子从植入物释放到活组织中。我们建议使用碳等离子体浸没离子注入和沉积（PIII & D）来增强NiTi的耐腐蚀性和其他表面和生物性能。我们的腐蚀和模拟体液测试表明，无论是通过PIII & D或直接碳PIII制造的离子混合非晶碳涂层可以显着提高耐腐蚀性和阻止镍从材料中的扩散。我们的摩擦学测试表明，经过处理的表面在机械性能上更加优越，并且细胞毒性测试表明，两组等离子体处理的样品都有利于成骨细胞的粘附和增殖。上级。
Nickel–titanium (NiTi) shape memory alloys possess super-elasticity in addition to the well-known shape memory effect and are potentially suitable for orthopedic implants. However, a critical concern is the release of harmful Ni ions from the implants into the living tissues. We propose to enhance the corrosion resistance and other surface and biological properties of NiTi using carbon plasma immersion ion implantation and deposition (PIII&D). Our corrosion and simulated body fluid tests indicate that either an ion-mixed amorphous carbon coating fabricated by PIII&D or direct carbon PIII can drastically improve the corrosion resistance and block the out-diffusion of Ni from the materials. Our tribological tests show that the treated surfaces are mechanically more superior and cytotoxicity tests reveal that both sets of plasma-treated samples favor adhesion and proliferation of osteoblasts.