This work investigates the effect of carbon alloying on the phase composition and microstructure of cermets based on the ternary boride Mo₂NiB₂. The sequence of precipitation of hard phases depending on the Mo/(B + C) ratio was determined. It is shown that at Mo/(B + C) close to 1, the phase composition is represented by boride Mo₂NiB₂, carbide Mo₂C and nickel binder. The increase of Mo/(B + C) ratio leads first to the formation of additional Mo₂C carbide, characterized by increased nickel content, and then to the appearance of κ-phase Mo₁₀Ni₃C₃B. The relationship between the phase formation, porosity, hardness and fracture toughness of sintered cermets is revealed.

这项工作研究了碳合金化对基于三元硼化物 Mo ₂ NiB ₂的金属陶瓷的相组成和微观结构的影响。确定了取决于 Mo/(B+C) 比率的硬质相沉淀顺序。结果表明，在Mo/(B+C)接近1时，相组成由硼化物Mo ₂ NiB ₂、碳化物Mo ₂ C和镍粘合剂表示。Mo/(B+C)比的增加首先导致形成额外的Mo ₂ C碳化物，其特征是镍含量增加，然后出现κ相Mo ₁₀ Ni ₃ C ₃B. 揭示了烧结金属陶瓷的相形成、孔隙率、硬度和断裂韧性之间的关系。