化学镀纳米晶铜涂层在润滑条件下的摩擦学性能研究  

Tribological Properties of Nanocrystalline Cu Coatings Produced by Electroless Plating under Various Lubrication Conditions

作　　者：韩庆功 张含卓[1] 方亮[1] 王延庆[1] 

机构地区：[1]中国矿业大学,江苏徐州221116

出　　处：《稀有金属材料与工程》2011年第S2期356-359,共4页Rare Metal Materials and Engineering

基　　金：国家"973"项目(2007CB607605);中央高校基本科研业务费专项基金(2010QNA08);中国矿业大学启航计划

摘　　要：采用化学镀方法在45钢表面制备平均晶粒尺寸约为68nm的纳米晶铜涂层。显微分析表明,纳米晶铜存在明显的(111)晶面织构,其表面由大量微/纳米级团簇组成。采用UMT-Ⅱ型摩擦磨损试验机进行销–盘旋转实验,对比研究纳米晶铜与粗晶铜的摩擦学性能。结果表明,纳米晶铜的摩擦系数和跑合时间均随滑动速度的增大而降低。当滑动速度为0.25m/s时,其在机油和石蜡润滑条件下的摩擦系数分别为0.02和0.03。相同润滑条件下,纳米晶铜的摩擦学性能优于粗晶铜,这与其较好的表面疏液性能和较高的硬度值有关。Nanocrystalline Cu (NC-Cu) coatings with an average grain size of about 68 nm were produced on 45 steel by electroless plating. Microsturctural analysis has shown that NC-Cu coatings have a strong (111) crystallographic texture and a rough surface full of micro/nano clusters. By pin-on-disc rotation tests on UMT-Ⅱ friction and wear test machine, tribological properties of both NC-Cu and coarse-grained Cu (CG-Cu) were compared and investigated. The results indicate that both friction coefficients and running-in periods of NC-Cu are decreased by the increment of sliding speeds. When the sliding speed is increased to 0.25 m/s, the friction coefficient of NC-Cu under lubrication of engine oil and paraffin are 0.02 and 0.03, respectively. The tribological properties of NC-Cu are better than those of CG-Cu under the same lubrication conditions, which might be related with a better surface hydrophobicity and higher hardness of NC-Cu.

关 键 词：纳米晶铜 涂层 摩擦系数 润滑 化学镀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]