J. Mater. Sci. Technol. ›› 2023, Vol. 155: 33-46.DOI: 10.1016/j.jmst.2022.12.071

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Outstanding high-temperature oxidation- and wear-resistance of WC based cermets

Wentao Jianga, Hao Lua,*, Xuemei Liua, Haibin Wanga, Dongyang Lib,*, Chao Liuc, Mingsheng Wangc, Xiaoyan Songa,*   

  1. aFaculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China;
    bDepartment of Chemical & Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2H5, Canada;
    cXiamen Tungsten Co., Ltd., Xiamen 361009, China
  • Received:2022-11-10 Revised:2022-12-03 Accepted:2022-12-09 Published:2023-08-20 Online:2023-03-12
  • Contact: *E-mail addresses: haolu@bjut.edu.cn (H. Lu), dongyang.li@ualberta.ca (D. Li),xysong@bjut.edu.cn (X. Song).

Abstract: The interaction between oxidation and frictional load can greatly deteriorate the performance of ceramic-metal composites. In this work, we used WC-Co cermet as a representative of ceramic-metal composites to study its wear failure behavior and protection effectiveness. It is found that a transition of wear mechanism from mechanical wear to oxidative wear occurs with increasing temperature. The addition of zirconia can significantly improve the anti-oxidation performance and load-bearing capacity of the cermet under the frictional load. This is mainly attributed to the modulation of the tribo-oxide layer constitutions and changes in surface morphology. The zirconia component facilitates the formation of a dense protective oxide layer and reduces the content of brittle oxides on the worn surface. Based on the understanding of the temperature- and oxidation-induced compositional and microstructural evolutions at the sliding contact surface and subsurface, a promising approach is proposed for developing ceramic-metal composites with high wear resistance and anti-oxidation capability.

Key words: Cermet, Anti-oxidation performance, Wear mechanism, Zirconia