Mo₂C is one of the transition metal carbides exhibiting several desirable properties and is thus used in applications requiring hard materials. However, a dual-phase Mo₂C based cermet has never been reported. In this study, a Mo₂C-20 mass%Ni dual-phase cermet was fabricated by controlling the total carbon content and performing rapid cooling. An increase in the carbon content and the use of a higher cooling rate suppressed the formation of the η-phase, resulting in a metastable Mo₂C-Ni dual-phase cermet. The transverse rapture strength of the cermet after sintering in vacuum and N₂ was 1.7 and 2.0 GPa, respectively. Furthermore, fracturing in the sample was initiated at the micropores near the tension side, and the fracture mode was transgranular. The results of this study should aid efforts to develop other dual-phase cermets that show good mechanical properties.

Mo ₂ C是表现出几种理想性能的过渡金属碳化物之一，因此可用于需要硬质材料的应用中。然而，从未报道过基于双相Mo ₂ C的金属陶瓷。在本研究中，通过控制总碳含量并进行快速冷却来制备Mo ₂ C-20质量％Ni双相金属陶瓷。碳含量的增加和较高冷却速率的使用抑制了η相的形成，从而导致了亚稳态的Mo ₂ C-Ni双相金属陶瓷。金属陶瓷在真空和N _2下烧结后的横向断裂强度分别为1.7 GPa和2.0 GPa。此外，样品的断裂在张力侧附近的微孔处开始，并且断裂模式是经晶的。这项研究的结果应有助于开发其他具有良好机械性能的双相金属陶瓷。