Study on the preparation and fretting behavior of bonded oriented MoS2 solid lubricant coating

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2024-07-06 DOI:10.1007/s40544-024-0895-2
Liangliang Xiong, Mengxue Wu, Xiaoqiang Fan, Minhao Zhu
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Abstract

The bonded MoS2 solid lubricant coating is an effective measure to mitigate the fretting wear of AISI 1045 steel. In this work, the amino functionalized MoS2 was protonated with acetic acid to make the MoS2 positively charged. The directional arrangement of protonated MoS2 in the coating was achieved by electrophoretic deposition under the electric field force. The bonded directionally aligned MoS2 solid lubricant coating showed high adaptability to various loads and excellent lubrication performance under all three working conditions. At a load of 10 N, the friction coefficient and wear volume of the coating with 5 wt% protonated MoS2 decreased by 20.0% and 37.2% compared to the pure epoxy coating, respectively, and by 0.07% and 16.8% than the randomly arranged MoS2 sample, respectively. The remarkable lubricating properties of MoS2 with directional alignment were attributed to its effective load-bearing and mechanical support, barrier effect on longitudinal extension of cracks, and the formation of a continuous and uniform transfer film.

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键合定向 MoS2 固体润滑涂层的制备和摩擦行为研究
键合 MoS2 固体润滑剂涂层是减轻 AISI 1045 钢摩擦磨损的有效措施。在这项工作中,用醋酸对氨基官能化的 MoS2 进行质子化处理,使 MoS2 带正电荷。在电场力的作用下,通过电泳沉积实现了质子化 MoS2 在涂层中的定向排列。定向排列的 MoS2 固体润滑涂层在三种工况下均表现出对各种载荷的高度适应性和优异的润滑性能。在 10 N 的载荷下,5 wt% 质子化 MoS2 涂层的摩擦系数和磨损体积比纯环氧涂层分别降低了 20.0% 和 37.2%,比随机排列的 MoS2 样品分别降低了 0.07% 和 16.8%。定向排列的 MoS2 具有显著的润滑性能,这归功于其有效的承载和机械支撑、对裂纹纵向延伸的阻隔作用以及形成连续均匀的转移膜。
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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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