镍钛合金支架疲劳性能的研究进展  

Research Progress on Fatigue Performance of Nitinol Alloy Stents

作　　者：杨练[1] 段焕玲 Yang Lian;Duan Huanling(Tianjin Medical University General Hospital,Tianjin 300052,China;Tianjin hearing impairment hospital,Tianjin 300171,China)

机构地区：[1]天津医科大学总医院,天津300052 [2]天津市听力障碍专科医院,天津300171

出　　处：《硬质合金》2021年第6期454-459,共6页Cemented Carbides

摘　　要：镍钛合金因其形状记忆效应和良好的生物相容性成为理想的人体植入材料,广泛应用于人体管腔支架等医疗领域。疲劳性能是该合金医疗应用的重要指标,需满足10年以上的疲劳使用寿命。本文综合评述了镍钛合金疲劳性能的相关研究,包括:通过有限元分析法预测合金的疲劳寿命,采用表面处理技术和热处理技术改善合金的耐腐蚀性能和耐磨性能,进而提高合金的疲劳性能。在此基础上,提出利用调节镍钛合金的化学成分、加工技术、热处理方式以及合金表面改性等方法以提升镍钛合金的生物兼容性和耐疲劳性能,将成为镍钛合金的研究热点。Nitinol has become an ideal human implant material due to its shape memory effect and goodbiocompatibility,and is widely used in medical fields such as human luminal stents.Fatigue performance is an importantindex for medical applications of this alloy,and it needs to meet a fatigue life of more than 10 years.In this article the relevantresearch on the fatigue performance of nickel-titanium alloys has been comprehensively reviewed,includingpredicting thefatigue life of the alloy by finite element analysis,using surface treatment technology and heat treatment technology to improvethe corrosion resistance and wear resistance of the alloy,thereby improving the fatigue performance of the alloy.On this basis,it is proposed to adjust the chemical composition,processing technology,heat treatment method and alloy surfacemodification of Nitinol to improve the biocompatibility and fatigue resistance of Nitinol,which will become a research hotspotof Nitinol.

关 键 词：镍钛合金 管腔支架 疲劳性能 有限元分析 表面处理 

分 类 号：R318.08[医药卫生—生物医学工程] TG139.6[医药卫生—基础医学]