采用真空液相烧结技术制备了Mo₂FeB₂基金属陶瓷，研究了钒添加量（质量分数，0～7.5%）对其组织和力学性能的影响。结果表明：当钒添加量不大于2.5%时，金属陶瓷的孔隙率无明显变化，当钒添加量大于2.5%时，金属陶瓷中的孔隙明显增多，金属陶瓷的致密性下降；钒的添加对金属陶瓷的相组成无显著影响，Mo₂FeB₂硬质相均匀分布在铁基黏结相中；当钒添加量为2.5%时，硬质相呈长条状且明显细化；当钒添加量大于2.5%时，硬质相发生团聚，且形貌由长条状向等轴状转变；随着钒添加量的增加，金属陶瓷的硬度、抗弯强度和断裂韧度均先增后降，当钒添加量为2.5%时均达到最大值，分别为90.6 HRA、2 350 MPa和15.1 MPa·m^1/2。

Mo₂FeB₂-based cermets were prepared by vacuum liquid phase sintering technique. The effect of V addition amount (0-7.5wt%) on the microstructure and mechanical properties of cermets was investigated. The results show that the porosity of cermets had little change when V addition amount was not more than 2.5wt%. When V addition amount was more than 2.5wt%, pores in cermets increased obviously and the relative density of cermets decreased. V addition had no effect on the phase composition of cermets, and Mo₂FeB₂ hard phase was uniformly distributed in the iron-base bonding phases. When the V addition amount was 2.5wt%, hard phase was long ribbon shape and was obviously refined. When V addition amount exceeded 2.5wt%, hard phase agglomerated and its morphology changed from long ribbon shape to equiaxial shape. With the increase of V addition amount, the hardness, rupture strength and fracture toughness all first increased and then decreased, and reached their maximum values with V addition amount of 2.5wt%, which were 90.6 HRA, 2 350 MPa and 15.1 MPa·m^1/2, respectively.