利用高温原位氧屏蔽效应改善WSNb纳米复合涂层的润滑:与密度泛函理论模拟相结合的研究

IF 1.6 3区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-01-23 DOI:10.1177/13506501221151099

Jianing Zhu, Qunfeng Zeng, Bing Zhang, Chao Yan, Wanjun He, N. Lin

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引用次数: 2

摘要

为了提高ws2基涂层在高温下的润滑性能，研究了ws2基涂层在高温下提高摩擦学性能的机理。掺杂11.9 at的WSNb涂层。% Nb表现出优异的抗摩擦和耐磨性，在400℃时达到了低摩擦系数0.02，其耐磨性远远优于ws2基涂层。在400℃时，涂层中的Nb金属及其硫化物比WS2对氧更敏感，这降低了摩擦副之间的氧浓度，保护了WS2润滑相不被氧化。此外，Nb通过固溶体强化效应提高涂层的硬度和杨氏模量，在镀银过程中形成更连续稳定的润滑膜。第一性原理计算结果表明，Nb在涂层中与S原子自发形成Nb-S键。Nb-S形成的分子细节已被深入研究。

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Improving the lubrication of WSNb nanocomposite coatings by the in-situ oxygen shielding effect at elevated temperatures: A combined study with density functional theory simulations

In order to improve the lubrication performance of the WS2-based coatings at elevated temperature, the mechanisms of enhancing the tribological performance of WSNb coatings at elevated temperatures are investigated. The WSNb coating doped with 11.9 at.% Nb exhibited excellent anti-friction and wear resistance, achieved a low coefficient of friction of 0.02 at 400 °C, and its wear resistance was much better than that of WS2-based coatings. The Nb metal and its sulfide in the coating are more sensitive to oxygen than WS2 at 400 °C, which reduces the oxygen concentration between the friction pairs and protects the WS2 lubricating phase from being oxided. In addition, Nb enhances the hardness and Young's modulus of the coatings through the solid solution strengthening effect, generating a more continuous and stable lubricating film during the silding process. First-principles calculation results demonstrated that the Nb spontaneously forms Nb-S bonds with S atoms in the coating. The molecular details of the Nb-S formation have been investigated in depth.

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 工程技术-工程：机械

CiteScore

4.20

自引率

5.00%

发文量

110

审稿时长

6.1 months

期刊介绍： The Journal of Engineering Tribology publishes high-quality, peer-reviewed papers from academia and industry worldwide on the engineering science associated with tribology and its applications. "I am proud to say that I have been part of the tribology research community for almost 20 years. That community has always seemed to me to be highly active, progressive, and closely knit. The conferences are well attended and are characterised by a warmth and friendliness that transcends national boundaries. I see Part J as being an important part of that community, giving us an outlet to publish and promote our scholarly activities. I very much look forward to my term of office as editor of your Journal. I hope you will continue to submit papers, help out with reviewing, and most importantly to read and talk about the work you will find there." Professor Rob Dwyer-Joyce, Sheffield University, UK This journal is a member of the Committee on Publication Ethics (COPE).