FRICTION AND WEAR PROPERTIES OF NANOCOMPOSITE COATINGS INCLUDING INORGANIC FULLERENE-LIKE
(Mo, W)S2 IN ENVIRONMENTS

TU Jiangping

(Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027)

Abstract: A quantity of inorganic fullerene-like IF-MoS2 and IF-WS2 nanoparticles is prepared by solidgas reaction, precipitation and solvent thermal induced methods. Ni-P-(IF-WS2) composite coatings on aluminum alloy are prepared by electroless codeposition. (Ni, Mo)/ IF-(Mo, W)S2 gradient nan- ocomposite coatings and IF-(Mo, W)S2/ (Ni, Mo)-IF-(Mo, W)S2 multilayer nanocomposite coatings are deposited on aluminum and titanium alloy substrates by magnetron sputtering and laser sputtering, respectively. The adhesion, friction and wear properties of the nanocomposite coating are evaluated using conventional scratch tester, a ball-on-disk tribometer both in vacuum (10–2 Pa) and in humid air. The Ni-P-(IF-WS2) composite coatings exhibite both higher wear resistance and lower friction coefficient than Ni-P electroless coating. The gradient and multilayer structures improve the adhesion of the coatings to alloy substrates. The (Ni, Mo)/ IF-(Mo, W)S2 gradient nanocomposite coatings and IF-(Mo, W)S2/ (Ni, Mo)-IF- (Mo, W)S2 multilayer nanocomposite coatings all show low friction coefficient and wear rate in different environments. The nanocomposite coatings containing IF-(Mo, W)S2 materials has excellent tribological stability.

Key words: Inorganic fullerene-like WS2 MoS2 Friction and wear Nanocomposite coating Environment

CLC No: TQ174 TH117.3

2006年中国机械工程学会年会推荐论文. 国家自然科学基金(50471044)和高等学校博士点专项基金(20050335038)资助项目. Received 20061205,  received in revised form 20061211