锡青铜表面离子镀AgCu复合薄膜的真空摩擦学性能研究  

Tribological Properties of QSn6.5-0.1 Alloy Coated with AgCu Composite Films

作　　者：胡明[1] 孙嘉奕[1] 翁立军[1] 刘维民[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000

出　　处：《机械工程材料》2003年第9期9-11,45,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(59805019)

摘　　要：在锡青铜(QSn6.5 0.1)基体上用离子镀技术沉积AgCu复合薄膜,用球 盘摩擦试验机评价了干摩擦和复合薄膜条件下锡青铜与9Cr18钢在真空下对摩的摩擦学性能。结果表明,沉积AgCu复合薄膜后,QSn6.5 0.1合金的真空摩擦学性能得到了明显改善,平均摩擦系数从0.86降低到0.23,同时降低了摩擦噪声。这主要是由于QSn6.5 0.1合金中的锡元素与对偶钢件的粘着促进了软金属薄膜向对偶件的转移,形成良好的转移膜,从而改善了真空摩擦学性能。AgCu composite films were deposited onto QSn6.50.1 alloy by ionplating. The tribological properties of specimens in vacuum (10-2Pa) were investigated using ballondisc friction and wear tester sliding against 9Cr18 steel ball. The SEM, EDS, XRD were used to analyze the wear tracks and the films. The results showed that QSn6.50.1 specimen coated with AgCu films exhibited better tribological performance than that of uncoated specimen. The AgCu coated QSn6.50.1 specimen maintained friction coefficient of 0.23, whereas the uncoated QSn6.50.1 showed friction coefficient of 0.86. It is found that AgCu transfer films formed on friction pair 9Cr18 ball when it slided against the AgCu coated QSn6.50.1 specimen. Surface analyses also prove that Sn element in QSn6.50.1 substrate contributed to the formation of AgCu transfer films. As a result friction occurred with AgCu transfer film against AgCu coated film, and a low friction coefficient was achieved due to easy shear of soft metals.

关 键 词：AgCu复合薄膜 QSn6.5-0.1合金 摩擦磨损 

分 类 号：TG1146.1[金属学及工艺—物理冶金] TG174.444[金属学及工艺—金属学]