4.7 Article

Microstructure evolution of the laser surface melted WC-Ni coatings exposed to cavitation erosion

期刊

TRIBOLOGY INTERNATIONAL
卷 173, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2022.107615

关键词

Cermet; Coating; Cavitation; Scanning electron microscopy

资金

  1. Zhejiang Provincial Natural Science Foundation of China [LZ22E090001]
  2. Ningbo 3315 Talents Program [2020A-29-G]
  3. Ningbo Science and Technology Inno-vation 2025 Major Program [2020Z086]
  4. Special Foundation for Postgraduate Innovation in Jiangxi Province [YC2020-S458]

向作者/读者索取更多资源

In this study, WC-Ni coatings were prepared using cold spraying and laser surface melting, forming a three-dimensional WC skeleton structure with uniform distribution. The remelted coatings with WC skeleton exhibited remarkable resistance against cavitation erosion by preventing crack propagation. The enhanced cavitation erosion resistance was attributed to the synergistic effect of the Ni binder phase and the hard WC phase.
In this study, WC-Ni coatings were deposited using cold spraying followed by laser surface melting to improve the cavitation erosion resistance. The remelted coating presented a three-dimensional WC skeleton structure which could be regulated. The remelted coatings with uniformly distributed WC skeleton exhibited remarkable cavitation erosion resistance. The observed microstructure evolution in the remelted coatings during cavitation erosion suggested that the WC skeleton prevented crack propagation and therefore enhanced the cavitation erosion resistance. Results also indicated that the enhanced cavitation erosion resistance of the remelted coatings was attributed to the synergistic effect of the Ni binder phase and the hard WC phase. Adjusting and controlling the structure of the coatings allowed the WC-based coatings to exhibit excellent cavitation erosion resistance.

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