Solid-liquid composite lubricating coating based on thermally sprayed ceramic template: Tribological properties, lubrication and failure mechanism

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL Wear Pub Date : 2025-03-15 Epub Date: 2025-01-11 DOI:10.1016/j.wear.2025.205741

Jialin He , Nairu He , Chunyan He , Shuangjian Li , Xiujuan Fan , Chao Wang , Mengyao Han , Chunming Deng , Jie Mao , Xiaofeng Zhang

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Abstract

In this study, a novel solid-liquid composite lubricating coating was prepared using the pores and micro-cracks of the thermally sprayed Al₂O₃/polyfluoroalkoxy coating, and the perfluoropolyether lubricating oil (PFPE) was incorporated into the coating as the liquid lubricating phase by vacuum thermal impregnation technology. The results indicate that PFPE encapsulated nanoscale Al₂O₃ and polyfluoroalkoxy abrasive debris, generating a lubrication protrusion structure at friction interfaces. The protrusion structure exhibits a high adhesion force (119 nN), thereby preventing crack propagation on the worn surface. A minimal friction coefficient of 0.07 is reached by creating a protrusion surface. This lowers the rate of wear by about 79 % compared to before oil immersion conditions and by about 99 % compared to Al₂O₃ coatings. Continuous consumption of PFPE, coupled with the accumulation of wear debris during sliding, gradually destroys the lubricating protrusion structures, ultimately leading to its failure.

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基于热喷涂陶瓷模板的固液复合润滑涂层：摩擦学性能、润滑及失效机理

本研究利用热喷涂Al2O3/聚氟烷氧基涂层的孔隙和微裂纹制备了一种新型固液复合润滑涂层，并通过真空热浸渍技术将全氟聚醚润滑油（PFPE）作为液体润滑相掺入涂层中。结果表明：PFPE包覆纳米级Al2O3和多氟烷氧基磨粒，在摩擦界面处形成润滑凸出结构；突出结构具有较高的附着力（119 nN），从而防止了磨损表面裂纹的扩展。通过创建一个突出表面，可以达到0.07的最小摩擦系数。与浸油前相比，磨损率降低了约79%，与Al2O3涂层相比，磨损率降低了约99%。PFPE的不断消耗，加上滑动过程中磨损碎屑的积累，逐渐破坏润滑突出结构，最终导致其失效。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.