【作者】 任妮； 马占吉； 肖更竭； 武生虎； 程峰；

【Author】 Ren Ni, Ma Zhanji ,Xiao Gengjie, Wu Shenghu and Cheng Feng State Key Lab of Surface Engineering, Lanzhou Institute of Physics, Lanzhou ,730000, China; School of Physics Science and Technology, Lanzhou University, Lanzhou,730000, China

【机构】 兰州物理研究所表面工程技术国家级重点实验室； 兰州大学物理学院材料系；

【摘要】 用脉冲电弧离子镀技术在NiTi合金生物材料表面沉积了类金刚石(DLC)薄膜。研究分析结果表明制备的DLC薄膜是四面体非晶碳薄膜;随着DLC薄膜厚度的增加,薄膜的表面粗糙度增加,薄膜中sp3的含量减少;随着sp3含量的增加,薄膜的纳米硬度升高;划痕实验表明临界载荷大于0．9 N。研究得出:与NiTi合金相比,DLC薄膜能够有效地降低摩擦系数和磨损。DLC薄膜的摩擦系数主要与薄膜的硬度及薄膜中sp3的含量有关,DLC薄膜的磨损主要是轻微的磨粒磨损及疲劳磨损。更多还原

【Abstract】 Diamond-like carbon(DLC)films were grown by pulsed arc ion plating on NiTi alloy substrate. Its microstructures and mechanical properties were characterized with X-ray photoelectron spectroscopy, atomic force microscopy, Raman spectroscopy and tribology, etc. The results show that as the thickness of the tetrahedral amorphous DLC films increases,its surface roughens and its sp3 density decreases and that as sp3 density increases,its hardness increases with a critical load of no less than 0.9 N.The DLC film has lower friction and higher wear-resistance than the bulk NiTi.The main wear mechanisms are found to be slight abrasive and fatigue wears.更多还原