江西科学2025，Vol.43Issue(3)：507-513,7.DOI:10.13990/j.issn1001-3679.2025.03.16
WC含量对CoCrFeMnNi高熵合金涂层的组织和性能影响
Effect of WC Content on the Microstructure and Properties of CoCrFeMnNi High-Entropy Alloy Coatings
摘要
Abstract
This study aims to investigate the influence of WC content(0.2～1.0 at.%)on the microstructure and properties of plasma-clad CoCrFeMnNi high-entropy alloy coatings.Microstructural analysis and mechanical testing were conducted to examine the coatings'microstructure,phase composition,and mechanical performance.The results show that as the WC content increases,the phase composition of the coatings transitions from a single FCC phase to a multiphase structure containing(Fe,Cr)7C3,M6C(Fe3W3C),W2C,and WC.The(110)diffraction peak of the FCC phase shifts first to the left and then to the right,indicating that the lattice constant first increases and then decreases,which is closely related to the decomposition behavior of WC.At low WC content(0.2 at.%),the coating primarily consists of fine columnar dendrites,while at high WC content(1.0 at.%),feather-like dendrites form,with unmelted WC particles enriched in the interdendritic regions.The microhardness increases from 361.1 Hv for WC0.2 to 576.3 Hv for WC1.0,following a fitted relationship of Hv=268.2+53.2x.This enhancement is primarily attributed to the solid solution strengthening,dispersion strengthening,and second-phase strengthening effects of carbides.Additionally,the increase in WC content leads to a higher dilution rate of the clad layer,reaching up to 35.5%(WC0.8).关键词
高熵合金/WC/等离子熔覆/显微组织/力学性能Key words
high-entropy alloy/WC/plasma cladding/microstructure/mechanical properties分类
金属材料引用本文复制引用
刘文政,谌昀,杨学兵,魏仕勇..WC含量对CoCrFeMnNi高熵合金涂层的组织和性能影响[J].江西科学,2025,43(3):507-513,7.基金项目
江西省科学院省级科研院基础研究与人才专项一般项目(2023YJC2012,2023YSBG22019) （2023YJC2012,2023YSBG22019）
江西省科学院博士引进项目(2022YYB19). （2022YYB19）
