中国组织工程研究与临床康复2011，Vol.15Issue(3)：461-464,4.DOI:10.3969/j.issn.1673-8225.2011.03.020
TiN/Ti纳米涂层修饰镍钛合金的体外腐蚀行为
In vitro corrosion behavior of nano-multilayered TiN/Ti coated NiTi alloy
摘要
Abstract
BACKGROUND: A nickel-titanium alloy with super-elastic, shape memory effect and good fatigue resistance has become the optimal choice for the core component of occluder stent, but the nickel-titanium alloy containing 50％ nickel has a controversial biocompatibility.OBJECTIVE: To study anti-corrosion property of occluder nickel-titanium alloy before and after multi-arc ion plating by static immersion in vitro and electrochemical methods.METHODS: Nano-gradient TiN/Ti multilayered films had been fabricated on nickel-titanium alloy by multi-arc ion plating. Nickel ion concentration was investigated by static immersion in PBS for one month. The anti-corrosion property of nickel-titanium alloy before and after surface modification was measured by open circuit potential-time curve and polarization curve.RESULTS AND CONCLUSION: Nickel-titanium alloy had been released and reached the maximum values during one-month immersion period, while no nickel ion was found released from the TiN/Ti multilayered coated NiTi alloy. Open circuit potential-time curves and polarization curves show that the corrosion resistance of nickel-titanium alloy has been greatly improved after modification.关键词
纳米涂层/TiN/Ti/镍钛合金/腐蚀/镀膜分类
医药卫生引用本文复制引用
邵安良,成艳,奚廷斐,周艺,周亮,万子义..TiN/Ti纳米涂层修饰镍钛合金的体外腐蚀行为[J].中国组织工程研究与临床康复,2011,15(3):461-464,4.基金项目
国家重大基础研究项目(973):具有纳米修饰的心血管植入器件(2009CB930004) （973）
国家自然科学基金:构建生物相容性良好的镍钛合金血管支架表面若干关键问题的探索(30870623). （30870623）
