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Research Article | Open Access | Just Accepted

Superior wear performance of CoCrNi matrix composite reinforced with quasi-continuously networked graphene nanosheets and in-situ carbide

Wenting Ye1Mingda Xie1Qing Zhou1()Biao Chen1Yixue Li2()Lei Jia3Haifeng Wang1()Weimin Liu4

1 Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518063, China

2 Analytical & Testing Center, Northwestern Polytechnical University, Xi’an 710072, China

3 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China

4 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract

The biological materials evolved in nature generally exhibit interpenetrating network structures, which may offer useful inspiration for the architectural design of wear-resistant composites. Here, a strategy for designing self-lubricating medium entropy alloy (MEA) composites with high strength and excellent anti-wear performance was proposed through quasi-continuously networked in-situ carbides and graphene nanosheets. The discontinuous coating of graphene on the MEA powder surface inhibits continuous metallurgy bonding of the MEA powders during sintering, generating the typical quasi-continuously networked architecture. A good combination of mechanical properties with high fracture strength over 2 GPa and large compressive plasticity over 30% benefits from metallurgy bonding that prevents crack initiation and extension. The wear rate of an order of 10-6 m3N-1m-1 ascribing to an amorphous-crystalline nanocomposite surface, tribo-film induced by graphene, as well as the gradient worn subsurface during friction was achieved by the MEA composite, which is an order of magnitude lower than the unreinforced MEA matrix.

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Cite this article:
Ye W, Xie M, Zhou Q, et al. Superior wear performance of CoCrNi matrix composite reinforced with quasi-continuously networked graphene nanosheets and in-situ carbide. Friction, 2024, https://doi.org/10.26599/FRICT.2025.9441001
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