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以CH4为碳源,氩气为辅助气体,利用射频等离子体增强化学气相沉积(RF-PECVD)的方法在种植体连接螺丝上制备了类金刚石(Diamond-like carbon,DLC)薄膜。采用拉曼光谱仪(Raman)、X射线光电子能谱仪(XPS)、扫描电子显微镜(SEM)、摩擦磨损试验机、纳米压痕仪等仪器对薄膜的结构、成分、形貌、机械及摩擦学特性进行表征。结果表明,所制备薄膜致密、平滑,均匀性较好。纳米压痕测试及生理盐水环境中的摩擦磨损试验显示,DLC薄膜具有较高的硬度和良好的生物润滑性,可作为种植体连接螺丝表面的承载减摩涂层。
Diamond-like carbon (DLC) films were prepared on the implant screw by using RF-PECVD with CH4 as carbon source and argon as auxiliary gas. The structure, composition, morphology, mechanical and tribological properties of the films were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), friction and wear tester, Characterization. The results show that the prepared films are compact, smooth and uniform. Nanoindentation test and frictional wear test in physiological saline environment show that DLC film has high hardness and good biological lubricity and can be used as load-bearing anti-friction coating on the screw surface of implant.