In this study, NbTaTiVW refractory high entropy alloy (RHEA) particles were used as a modulator to tailor mechanical performance and wear resistance of WC based matrix body drill bits. A series of (WC)₁₀₀(NbTaTiVW)_100-x (x = 0, 12, 20, 30 wt%) loose powder compacts was spontaneously infiltrated by Cu-Ni-Sn alloy binder under argon atmosphere. Microstructural studies indicated an adequate infiltration of WC/NbTaTiVW reinforcement phases with Cu-alloy binder without any micro or macro porosities. No intermetallic phases could be revealed at the WC/NbTaTiVW/binder interfaces owing to the high thermal stability of the reinforcement phases. The Charpy impact energy of the composites increased with increasing the content of RHEA particles, while the wear resistance was highly retained. The WC-20 wt% NbTaTiVW infiltrated composite exhibited 200% increase in the impact energy with only 10% increase in the wear rate. The analysis of fracture surface indicated that all the composites fail from cracks initiation and propagation in the WC particles. Finally, RHEA particles were introduced as proper and highly stable reinforcement particles for modulating mechanical properties of the WC-based matrix body drill bits.

在这项研究中，NbTaTiVW 耐火高熵合金 (RHEA) 颗粒用作调节剂来调整 WC 基基体钻头的机械性能和耐磨性。一系列 (WC) ₁₀₀ (NbTaTiVW) _100-x ( x = 0, 12, 20, 30 wt%) 松散的粉末压块在氩气氛下被 Cu-Ni-Sn 合金粘合剂自发渗透。微观结构研究表明，WC/NbTaTiVW 增强相与铜合金粘合剂充分渗透，没有任何微孔或大孔。由于增强相的高热稳定性，在 WC/NbTaTiVW/粘合剂界面处没有发现金属间相。复合材料的夏比冲击能随着 RHEA 颗粒含量的增加而增加，而耐磨性得以保持。WC-20 wt% NbTaTiVW 渗透复合材料的冲击能量增加了 200%，而磨损率仅增加了 10%。断口分析表明，所有复合材料都因WC颗粒中的裂纹萌生和扩展而失效。最后，