In the paper, the effect of CoCrMoW high entropy alloy (HEA) binder in cemented carbide on the microstructure and wear-resistant and oxidation-resistant properties of the coating is investigated to provide reference for the exploration and development of new wear resistance and oxidation-resistant materials. The results indicate that the coated WC-HEA has a dense coating structure and possesses excellent high-temperature wear resistance. Compared with the Ni or Co binder phase, the coated cemented carbide containing HEA binder phase has a large difference in the matrix microstructure, cross-section morphology, mechanical properties and friction and wear properties. It is also found that a significant amount of W in the substrate diffuses through grain boundaries into the TiN coating and TiCN coatings and forms a TixWxN solid solution at the interface between the TiN coating and the matrix. In particular, the uniformity of the distribution of HEA binder in the matrix directly affects the nucleation growth of the coatings. Nanohardness results indicate that the wear resistance of TiN/TiCN/AlO coating is in the order of WC-Ni < WC-HEA < WC- Co. These differences come from the effect of binder on the nucleation growth and textured orientation of the coating. The comprehensive mechanical properties of the WC-HEA are similarly that of WC- Co, and it has great potential to replace WC- Co. Compared with Ni and Co binder phases, the WC-HEA coating sample is more wear-resistant at 750 °C.

中文翻译：

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CoCrMoW高熵合金结合剂涂层硬质合金的显微组织和摩擦性能评价


本文研究了硬质合金中CoCrMoW高熵合金(HEA)粘结剂对涂层显微组织和耐磨抗氧化性能的影响，为探索和开发新型耐磨抗氧化材料提供参考。耐腐蚀材料。结果表明，涂​​层WC-HEA具有致密的涂层结构和优异的高温耐磨性能。与Ni或Co粘结相相比，含有HEA粘结相的涂层硬质合金在基体显微组织、截面形貌、力学性能和摩擦磨损性能方面存在较大差异。还发现基体中大量的W通过晶界扩散到TiN涂层和TiCN涂层中，并在TiN涂层和基体之间的界面处形成TixWxN固溶体。特别是，HEA粘合剂在基体中分布的均匀性直接影响涂层的成核生长。纳米硬度结果表明，TiN/TiCN/Al2O3涂层的耐磨性大小顺序为WC-Ni<WC-HEA<WC-Co。这些差异来自于粘结剂对涂层形核生长和织构取向的影响。 WC-HEA的综合机械性能与WC-Co相似，具有很大的替代WC-Co的潜力。与Ni和Co粘结相相比，WC-HEA涂层样品在750°下更耐磨C.