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纯钛表面纳米化后沉积铜在润滑条件下的 摩擦行为研究
Friction Behavior of Copper Deposited by Micro-arc Oxidation on Pure Titanium Surface under Lubrication Conditions
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- DOI:
- 作者:
- 罗锦洁，纪安平，左都全，赵英杰，邓正华
LUO Jinjie, JI Anping, ZUO Duquan, ZHAO Yingjie, DENG Zhenghua
- 作者单位:
- 重庆三峡学院 机械工程学院，重庆 404000
College of Mechanical Engineering, Chongqing Three Gorges University, Chongqing 404000, China
- 关键词:
- 纯钛；沉积铜；润滑；摩擦
titanium; plated copper; lubrication; friction
- 摘要:
- 目前钛表面进行纳米结构化改性受到了广泛关注，但是关于钛表面纳米结构化后的摩擦学性能研究报道较少。 为了改善钛的摩擦学性能，采用微弧氧化法在纯钛表面制备了 TiO 2 孔径在 400 nm 左右的介孔层，利用电化学脉冲沉积法将铜沉积在介孔层上。 通过摩擦磨损试验考察了改性层在润滑状态下的摩擦磨损行为，利用扫描电镜对改性层的表面形貌、磨损磨斑形貌进行表征。结果表明， TiO 2 纳米介孔层对沉积铜的粒径大小、致密度具有一定影响；微弧氧化沉积铜试样的磨损机制主要表现为犁沟磨损；微弧氧化试样制备的表层铜膜具有优异的减摩性能。
At present, nanostructured modification of the surface of pure titanium has received extensive attention, but few studies on the tribological properties of nanostructured titanium surfaces have been reported. A TiO 2 mesoporous layer with an ~400 nm pore size was prepared on the surface of pure titanium by micro-arc oxidation to improve the tribological properties of titanium. Copper was deposited onto this mesoporous layer by electrochemical pulse deposition. The friction behavior of the modified layer under lubrication was investigated by friction testing. The surface morphologies and wear scars of the modified layer were characterized by scanning electron microscopy (SEM). The results indicate that the TiO 2 nano-mesoporous layer affects the particle size and shape of the deposited copper. Furrow wear is characterized as the primary wear mechanism of micro-arc oxidation while micro-arc oxidation samples with copper deposition show excellent wear reduction under lubrication.