In this study, the influence of up to 15 vol% WC or Mo₂C addition to Ni bonded NbC matrix cermets, prepared by pressureless liquid phase sintering in vacuum for 90 min at 1390 °C was assessed. The constituent phases and W/Mo dissolution in the Ni binder and NbC phases were simulated by thermodynamic modelling. Microstructure and phase analysis using XRD and SEM indicated that the WC or Mo₂C modified NbC based cermets were composed of a (Nb,W)C or (Nb,Mo)C solid solution cubic phase dispersed in a cubic Ni alloy binder. Residual WC was present in the cermets with ≥10 vol% WC addition, whereas up to 15 vol% Mo₂C addition completely dissolved into the NbC cermets. The phase evolution and influence of the WC/Mo₂C content on the solid solution formation is discussed and the fracture toughness, Vickers hardness and transverse rupture strength was assessed.

在这项研究中，评估了通过在1390°C下真空无压液相烧结90分钟而制备的Ni键合NbC基体金属陶瓷中最多添加15 vol％WC或Mo ₂ C的影响。通过热力学模型模拟了Ni结合相和NbC相中的组成相和W / Mo溶解。使用XRD和SEM的微观结构和相分析表明，WC或Mo ₂ C改性的NbC基金属陶瓷由分散在立方Ni合金粘结剂中的（Nb，W）C或（Nb，Mo）C固溶体立方相组成。添加≥10 vol％的金属陶瓷中存在残留的WC，而最多添加15 vol％的Mo ₂ C完全溶解在NbC金属陶瓷中。WC / Mo ₂的相变及其影响讨论了固溶体形成过程中的碳含量，并评估了断裂韧性，维氏硬度和横向断裂强度。