In situ tribology of nanocomposite Ti–Si–C–H coatings prepared by PE-CVD
In situ tribology of nanocomposite Ti–Si–C–H coatings prepared by PE-CVD
复制标题
DOI：
10.1016/j.wear.2011.08.001
复制
发表时间：
2011-10
期刊：
影响因子：
5
通讯作者：
H. Strauss;R. Chromik;S. Hassani;J. Klemberg-Sapieha
中科院分区：
文献类型：
--
作者：
H. Strauss;R. Chromik;S. Hassani;J. Klemberg-Sapieha
采用原位摩擦磨损试验研究了等离子体增强化学气相沉积Ti-Si-C-H硬质涂层中第三体对涂层摩擦磨损性能的影响。涂层表现出纳米复合结构的纳米晶碳化钛包围无定形碳含H和Si（后者是目前在所有的涂层，但一个）。从纳米压痕测试，涂层的硬度在22和35 GPa之间。氢含量，这是由拉曼光谱，和硬度之间的负相关性。一个定制的原位摩擦磨损试验机，配备了半球形蓝宝石滑块，用于往复销平磨损试验。掩埋的接口进行了检查，在原位与视频显微镜，允许观察第三体形成（转移膜，磨损碎片）和速度调节模式。与不形成转移膜的涂层相比，取决于涂层化学和湿度水平的稳定转移膜的形成导致增加的耐磨性，而不管涂层的机械性能如何。从这项研究的结果表明，一种方法来优化硬保护涂层的摩擦学性能，不仅依赖于机械性能，但通过调查的第三体行为的补充。
In situ tribometry was used to examine the role of third bodies for the friction and wear behaviour of five hard Ti–Si–C–H coatings produced by plasma-enhanced chemical vapour deposition. Coatings exhibited nanocomposite structures consisting of nanocrystalline titanium carbide surrounded by amorphous carbon containing H and Si (the latter being present in all coatings but one). From nanoindentation testing, the hardness for the coatings was between 22 and 35GPa. An inverse correlation was found between hydrogen content, which was determined by Raman spectroscopy, and hardness. A custom-built in situ tribometer, equipped with a hemispherical sapphire slider, was used for reciprocating pin-on-flat wear tests. The buried interface was examined in situ with video microscopy, allowing for observation of third body formation (transfer films, wear debris) and velocity accommodation modes. The formation of a stable transfer film, which was dependent on coating chemistry and humidity level, resulted in increased wear resistance compared to coatings that did not form a transfer film, regardless of the coatings’ mechanical properties. Results from this study suggest an approach to optimising the tribological performance for hard protective coatings that does not rely solely on mechanical properties but is complemented by investigations on the third body behaviour.