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首页> 外文期刊>Journal of Materials Science >Investigating the wear characteristics of engineered surfaces: low-temperature plasma nitriding and TiN+MoSx hard-solid lubricant coating
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Investigating the wear characteristics of engineered surfaces: low-temperature plasma nitriding and TiN+MoSx hard-solid lubricant coating

机译：研究工程表面的磨损特性：低温等离子体渗氮和TiN + MoSx硬固体润滑剂涂层

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Significant progress has been made in the past decade in plasma nitriding with a majority of the research work focusing on improving hardness and wear resistance of the nitrided surface through the reduction of nitriding temperature, pressure or time. Hard-solid lubricating coatings have also been extensively studied for lowering the wear rate and coefficient of friction of traditional hard coatings such as TiN by the combined effect of hardness and solid lubrication. In this study, the wear characteristics of low-temperature plasma-nitrided steel substrate performed using a Saddle-field fast atom beam source and TiN + MoSx hard-solid lubricant coating deposited by a closed-field magnetron-sputtering technique have been investigated. The thin hard layer in plasma-nitrided substrates exhibited much higher hardness and lower wear compared to the untreated substrate in pin-on-disc wear testing. In addition, the study of the wear track morphology of the nitrided samples evidenced significant reduction of deeper ploughing and plastic deformation due to higher hardness and load supporting of the nitrided layer. On the other hand, due to the incorporation of MoS2 in TiN coating, the wear resistance and coefficient of friction were greatly improved in TiN + MoSx coating compared to pure TiN coating. In contrast to TiN coating, a relatively smoother wear track with less abrasive wear also supported the beneficial effects of adding MoS2 in TiN coating.
机译：在过去的十年中，等离子体氮化已经取得了重大进展，大部分研究工作集中在通过降低氮化温度，压力或时间来提高氮化表面的硬度和耐磨性。为了降低传统硬涂层（如TiN）的磨损率和摩擦系数，硬质固体润滑涂层还受到了广泛的研究，该方法通过硬度和固体润滑的联合作用来降低其磨损率和摩擦系数。在这项研究中，研究了使用鞍场快速原子束源和通过封闭磁场磁控溅射技术沉积的TiN + MoSx硬固体润滑剂涂层进行的低温等离子体氮化钢基底的磨损特性。在针盘式磨损测试中，与未处理的衬底相比，等离子氮化衬底中的薄硬层表现出更高的硬度和更低的磨损。此外，对渗氮样品的磨损轨迹形态的研究表明，由于渗氮层的硬度和承载能力更高，深耕和塑性变形的显着降低。另一方面，由于在TiN涂层中掺入了MoS2，与纯TiN涂层相比，TiN + MoSx涂层的耐磨性和摩擦系数大大提高。与TiN涂层相比，相对较平滑的磨损轨迹具有较少的磨料磨损，也支持在TiN涂层中添加MoS2的有益效果。

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