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类金刚石和硅氮类薄膜在人工关节表面的摩擦学性能
作者:石志锋1 2 郝丽静2 宁成云2 王迎军2 
单位:(1. 华南理工大学医疗器械研究检验中心 广州 510006 2. 华南理工大学材料科学与工程学院 广州 510641) 
关键词:类金刚石薄膜 硅氮薄膜 摩擦学性能 生物机械膜层 
分类号:TB333
出版年,卷(期):页码:2019,47(4):0-0
DOI:
摘要:

 类金刚石(DLC)和Si–N薄膜都是具有两性分子特性的超硬薄膜,从薄膜的机械强度、摩擦系数、表面能态等方面分析了两类薄膜作为生物机械膜层的性能。Si–N薄膜在与胎牛血清模拟体液环境接触时,表面张力相对于DLC薄膜小,表现出极强的亲水性。Co合金被覆DLC和Si–N薄膜能使显微硬度分别提高7倍及3倍。DLC薄膜的被覆显着提高了钴合金的显微硬度,但在胎牛血清(FBS)中与超高分子量聚乙烯(UHMWPE)的摩擦磨损实验中,摩擦系数变化不大;钴合金被覆Si–N薄膜后在FBS中对磨UHMWPE摩擦系数低至0.02,Si–N薄膜有望成为新型的生物机械保护膜层

 Diamond-like carbon (DLC) and Si?N films are amphipathic in nature. The DLC and SiN films displays ultralow friction coefficient, excellent mechanical and surface properties. The DLC and SiN films are very attractive film material for future biomedical applications. The surface tension between the solid surface of Si?N films and distilled water rapidly decreases, and the surface of Si?N films is more hydrophilic than that of DLC films. DLC and Si?N coating enhances the hardness of Co alloys seven- and three-fold, respectively. DLC coatings do not show obvious improvements in the tribological behavior over uncoated Co alloy/ultrahigh molecular weight polyethylene (UHMWPE) counterfaces in fetal bovine serum (FBS). The Si?N films/UHMWPE display an ultralow friction coefficient of 0.02, which improves the weaknesses of the Co alloy in FBS. Si?N film is a very attractive film material for future biomedical applications.

 
基金项目:
国家重点研发计划(2017YFC1105000)项目。
作者简介:
参考文献:

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