Ag-MoS2复合材料电磨损表面膜结构和形成机理研究(英文)  

Structure and Formation Mechanism of Surface Film of Ag-MoS_2 Composite during Electrical Sliding Wear

作　　者：李庶[1] 凤仪[1] 杨茜婷[1] 陈淑娴[1] 王娟[1] 

机构地区：[1]合肥工业大学材,安徽合肥230009

出　　处：《稀有金属材料与工程》2009年第11期1881-1885,共5页Rare Metal Materials and Engineering

基　　金：Supported by National Natural Science Foundation of China (50741003);Key Project of Science and Technology of Ministry of Education of China (107066);Anhui Provincial Natural Science Foundation (070414181)

摘　　要：采用粉末冶金方法制备了Ag-MoS2复合材料。初压压力300MPa,在H2保护气氛下烧结并保温1h,经500MPa压力的复压过程制得复合材料,用XRD对烧结后的材料进行了物相分析。对材料进行电磨损实验,并对磨损后的材料表面进行XPS分析。结果表明,复合材料在烧结过程中Ag基体和MoS2并未发生化学反应,而在磨损过程中,由于电流和化学作用,材料表面产生了MoO3,MoO2,同时由粘着作用从对磨环转移到电刷表面的铜与大气分子发生化学反应产生了Cu2O,CuOandCu2S。表面膜的存在降低了材料的摩擦系数,影响着材料的电磨损性能。Ag-MoS2 composite brushes were fabricated by means of powder metallurgy process. The composite was detected by the method of XRD after sintering, and the worn surface of the brush was analyzed by XPS after the wearing experiments with current. Results showed that the components of the composite didn＇t change during sintering, but the surface components of it changed upon wearing and some matters such as MoO3 and MoO2 were produced. At the same time, Cu2O, CuO and Cu2S were detected due to the adhesion transfer of elemental Cu from the slipping ring to the brush surface and the reaction between the elemental Cu and the ambient air molecules. During electrical sliding wearing, the surface film can reduce the friction coefficient and be beneficial to the frictional performance of the material.

关 键 词：Ag-MoS2复合材料 电磨损 表面膜 

分 类 号：TB33[一般工业技术—材料科学与工程]