Microtribological Performance of Au–MoS2 and Ti–MoS2 Coatings with Varying Contact Pressure
Microtribological Performance of Au–MoS2 and Ti–MoS2 Coatings with Varying Contact Pressure
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DOI：
10.1007/s11249-010-9657-6
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发表时间：
2010-07
影响因子：
3.2
通讯作者：
P. Stoyanov;R. Chromik;D. Goldbaum;J. R. Lince;Xiaoling Zhang
中科院分区：
文献类型：
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作者：
P. Stoyanov;R. Chromik;D. Goldbaum;J. R. Lince;Xiaoling Zhang
金属和MoS 2共溅射固体润滑涂层在较宽的接触应力和湿度范围内表现出良好的宏观摩擦学性能。这些材料也是微接触和微机电系统（MEMS）的候选材料，但人们对它们在这种规模下的性能知之甚少。在这项研究中，Au-MoS 2和Ti-MoS 2涂层的微摩擦学性能，与不同的金属添加剂小于15原子%，使用纳米压痕仪进行了检查。由于钛和金对涂层机械性能的影响不同，本研究选择钛和金作为金属添加剂。与纯MoS 2相比，涂层的硬度和折合模量随着金属的加入而增加。在干燥空气中用两个球形金刚石刀头（半径为50和10 μm）进行往复微划痕试验。使用的正常载荷范围为0.2 - 5.0 mN。摩擦和磨损测量进行了分析，相对于在接触压力的变化，并在宏观尺度上进行的文献研究进行了比较。涂层的机械性能，尖端涂层的附着力，界面剪切强度，和转移膜和摩擦膜的形成之间的相关性。
Solid lubricant coatings with co-sputtered metal and MoS2have shown favorable macrotribological properties at a wide range of contact stresses and humidity levels. These materials are also candidates for use in microcontacts and micro-electromechanical systems (MEMS), but their performance at this scale is poorly understood. For this study, microtribological properties of Au–MoS2and Ti–MoS2coatings, with varying metal additives of less than 15 at%, were examined using a nanoindentation instrument. Titanium and gold were chosen for this study as metal additives due to their different influence on the mechanical properties of the coating. The hardness and reduced modulus of the coatings increased with the addition of metal, when compared to pure MoS2. Reciprocating microscratch tests were performed with two spherical diamond tips (50 and 10 μm radii) in dry air. A range of normal loads were used between 0.2 and 5.0 mN. Friction and wear measurements were analyzed with respect to the variation in the contact pressure and compared to literature studies performed at the macroscale. Correlations were found between the coating mechanical properties, tip-coating adhesion, interfacial shear strength, and the formation of transfer films and tribofilms.