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

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL Wear Pub 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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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.