含无机类富勒烯(IF)过渡族金属硫化物纳米复合涂层的环境摩擦磨损特性

FRICTION AND WEAR PROPERTIES OF NANOCOMPOSITE COATINGS INCLUDING INORGANIC FULLERENE-LIKE(Mo,W)S_2 IN ENVIRONMENTS

采用固—气相反应、反应沉淀和溶剂热诱导法实现了IF-MoS2、IF-WS2纳米粉体的宏观量制备。分别用化学共沉积方法在硬铝基体上制备Ni-P-(IF-WS2)复合镀层,磁控溅射和激光溅射技术在硬铝合金和钛合金基体上制备(Ni,Mo)/IF-(Mo,W)S2梯度纳米复合涂层和IF-(Mo,W)S2/(Ni,Mo)-IF-(Mo,W)S2多层纳米复合涂层。用划痕仪、球—盘式摩擦仪评估纳米涂层的结合力及其在真空(10-2Pa)和大气中的摩擦磨损性能。Ni-P-(IF-MoS2)化学复合镀层的硬度、摩擦因数和磨损率明显低于Ni-P化学镀层。梯度和多层复合结构有利于涂层与合金基体结合力的提高。(Ni,Mo)/IF-(Mo,W)S2纳米梯度复合涂层和(Ni,Mo)-IF-(Mo,W)S2/IF-(Mo,W)S2纳米多层复合涂层在不同环境下都有低的摩擦因数和磨损率。含无机类富勒烯(IF-)WS2或MoS2的纳米复合涂层具有优良的环境稳定性。

A quantity of inorganic fullerene-like IF-MoS2 and IF-WS2 nanoparticles is prepared by solid-gas 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 nanocomposite coatings and IF-（Mo, W）S2/ （Ni, Mo）-IF-（Mn, 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-（Mn, 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.