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Journal of Advanced Ceramics 2023, 12(2): 357-372 https://doi.org/10.26599/JAC.2023.9220689
Research Article | Open Access | Issue | Published: 17 January 2023

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

Show Author's Information Zhichao Wua,b,  Shuangjian Lib( ),  Xiujuan Fanb,  Florian Vogela,  Jie Maob,  Xiaohui Tua( )
Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China
Institute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory of Modern Materials Surface Engineering Technology, Guangzhou 510650, China
Keywords:
friction and wear, mechanical properties, in-situ synthesis, self-lubricating ceramic coatings, thermal spray, MoS2/C
Cite this article:
Wu Z, Li S, Fan X, et al. In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template. Journal of Advanced Ceramics, 2023, 12(2): 357-372. https://doi.org/10.26599/JAC.2023.9220689
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Abstract Full text Electronic supplementary material About this article

The self-lubricating ceramic coatings that can control friction and wear have attracted researchers’ widespread attention. However, the poor interfacial bonding between lubricants and ceramics and the deterioration of mechanical properties due to a tribological design limit their practical applications. Here, a robust self-lubricating coating was fabricated by an in-situ synthesis of MoS2/C within inherent defects of thermally sprayed yttria-stabilized zirconia (YSZ) coatings. The edge-pinning by noncoherent endows hybrid coatings with excellent interfacial strength, increasing their hardness (HV) and cohesive strength. Furthermore, owing to the formation of a well-covered robust lubricating film at a frictional interface, a coefficient of friction (COF) can be reduced by 79.6% to 0.15, and a specific wear rate (W) drops from 1.36×10−3 to 6.27×10−7 mm3·N−1·m−1. Combining outstanding mechanical properties and tribological performance, the hybrid coating exhibits great application potential in controlling friction and wear. Importantly, this strategy of introducing the target materials into the inherent defects of the raw materials to improve the relevant properties opens new avenues for the design and preparation of composite materials.


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About this article

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

Show Author's information Zhichao Wua,b, Shuangjian Lib( ), Xiujuan Fanb, Florian Vogela, Jie Maob, Xiaohui Tua( )
Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China
Institute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory of Modern Materials Surface Engineering Technology, Guangzhou 510650, China

Abstract

The self-lubricating ceramic coatings that can control friction and wear have attracted researchers’ widespread attention. However, the poor interfacial bonding between lubricants and ceramics and the deterioration of mechanical properties due to a tribological design limit their practical applications. Here, a robust self-lubricating coating was fabricated by an in-situ synthesis of MoS2/C within inherent defects of thermally sprayed yttria-stabilized zirconia (YSZ) coatings. The edge-pinning by noncoherent endows hybrid coatings with excellent interfacial strength, increasing their hardness (HV) and cohesive strength. Furthermore, owing to the formation of a well-covered robust lubricating film at a frictional interface, a coefficient of friction (COF) can be reduced by 79.6% to 0.15, and a specific wear rate (W) drops from 1.36×10−3 to 6.27×10−7 mm3·N−1·m−1. Combining outstanding mechanical properties and tribological performance, the hybrid coating exhibits great application potential in controlling friction and wear. Importantly, this strategy of introducing the target materials into the inherent defects of the raw materials to improve the relevant properties opens new avenues for the design and preparation of composite materials.

Keywords: friction and wear, mechanical properties, in-situ synthesis, self-lubricating ceramic coatings, thermal spray, MoS2/C

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Publication history

Received: 25 July 2022
Revised: 18 October 2022
Accepted: 31 October 2022
Published: 17 January 2023
Issue date: February 2023

Copyright

© The Author(s) 2022.

Acknowledgements

We are grateful for the financial support from the National Natural Science Foundation of China (51905212), Guangdong Key Laboratory of Modern Surface Engineering Technology (2020B1212060049), Science and Technology Project of Guangdong Academy (2021GDASYL-20210103062), Young Scientific and Technological Talents Promotion Project of Guangzhou Science and Technology Association (X20210201061), and Foshan Taoyuan Institute of Advanced Manufacturing (TYKF202203003).

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