High performance nanostructured Cr-WS2 solid lubricant coatings prepared on mechanically textured substrates
High performance nanostructured Cr-WS2 solid lubricant coatings prepared on mechanically textured substrates
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DOI：
10.1504/ijsurfse.2015.072070
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发表时间：
2015-10
影响因子：
0.8
通讯作者：
B. Deepthi;Praveen Kumar;G. Srinivas;H. Barshilia
中科院分区：
文献类型：
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作者：
B. Deepthi;Praveen Kumar;G. Srinivas;H. Barshilia
在机械织构不锈钢基体上制备了Cr-WS2纳米复合固体润滑涂层。使用滚花工具在基板上创建了深度约为10-12 μ m、面积为100 × 80 μ m2、均匀间距为300 μ m的微米大小的凹窝。基体表面织构可以显著提高Cr-WS2纳米复合涂层的摩擦学性能。在有织构钢基体上制备的Cr-WS2纳米复合涂层在28800次循环后的摩擦系数为0.1，而在无织构钢基体上制备的涂层的摩擦系数为0.45。凹陷区域充当固体润滑剂储层，也有助于捕获磨损碎屑。利用场发射扫描电子显微镜和能量色散x射线能谱研究证实了固体润滑剂材料在凹陷区域的保留。
Cr-WS2 nanocomposite solid lubricant coatings were prepared on mechanically textured stainless steel substrates. Micron-sized dimples of approximately 10-12 µm depth and 100 × 80 µm2 area with uniform dimple spacing of 300 µm were created on the substrates using a knurling tool. Substrate surface texturing improved the tribological properties of Cr-WS2 nanocomposite coatings significantly. Cr-WS2 nanocomposite coatings prepared on textured steel substrates exhibited a friction coefficient of 0.1 after 28,800 cycles compared to coatings prepared on non-textured substrates which exhibited a friction coefficient of 0.45. The dimpled regions acted as solid lubricant reservoirs and also helped in trapping wear debris. The retention of solid lubricant material in the dimpled region was confirmed using field emission scanning electron microscopy and energy dispersive X-ray spectroscopy studies.