IBAD制备WS_2-Ag固体润滑膜在海南湿热环境的耐候性能  

Weatherable Property of WS_2-Ag Composite Solid Lubrication Films Prepared by IBAD Under Hygrothermal Environment in Hainan

作　　者：金杰[1] 黄晓林[1] 邱维维[1] 崔华威[1] 孟祥宇[1] 

机构地区：[1]北京机械工业自动化研究所电器物理设备与应用工程技术中心,北京100120

出　　处：《中国表面工程》2016年第3期26-33,共8页China Surface Engineering

基　　金：北京机械工业自动化研究所所基金(10211281042)

摘　　要：为了研究固体润滑膜的耐候性失效行为,利用考夫曼离子源与磁控溅射相结合的离子束辅助沉积(IBAD)技术在9310基底材料上制备Ag掺杂WS_2固体润滑膜。通过海南湿热环境挂片、摩擦磨损性能测试以及Pro-XPS、XRD和FESEM检测技术,检测膜层的耐候性能、摩擦磨损性能并表征测试前后的化学态、物相与表面形貌等,分析膜层在海南湿热环境下的失效机理。研究结果表明:制备的WS2-Ag固体润滑膜实现了纳米级Ag颗粒的掺杂,WS_2与Ag皆为六方层状晶体结构,维持0.05摩擦因数的时间超过600 min。挂片试验后复合膜表层生成WO_3和AgO_2,内部形成非晶AgO_2,WO_3含量降低甚至消失;氧化物的形成影响了转移膜的形成与磨粒磨损过程,进而导致复合膜的润滑性能降低,使其维持低摩擦因数(0.09)的时间降至30 min。In order to inspect behaviors of solid lubricant under hygrothermal environment, WS2-Ag composite films were prepared by ion beam assist deposition （IBAD） technique combined with a magnetron sputtering and a pair of Kauffmann ion sources. The behaviors were examined by tribo tester and coupon test in Hainan hygrothermal environment. The composition, microstructure and morphologies were detected by XPS, XRD and FESEM. Finally, the mechanism was analyzed. The results show that the composite films realize the addition of Ag, and both Ag and WS2 are hexagonal platelet structure. The composite films can sustain more than 600 min with a friction coefficient of 0.05. After the coupon test, WO3 and AgO2 are generated on the composite film surface, while AgO2 generated under a certificated distance below the surface. Moreover, the amount of WO3 decreases, or even disappears. However, the amorphous oxides created during the oxidation affect the formation of transfer film and behaviors of abrasive wear. The lubrication preserves only 30 min with a lower friction coefficient of 0.09 under the same testing condition.

关 键 词：固体润滑膜 湿热 WS2-Ag复合膜 挂片试验 氧化 

分 类 号：TG174.444[金属学及工艺—金属表面处理]