Effect of nano-sized ZrO2 on the recrystallization of Mo alloy

Mo-ZrO2 alloy plate was prepared by combing hydrothermal synthesis and powder metallurgy, and its microstructure, fracture and mechanical properties after annealing at different temperatures were analyzed. Compared with pure molybdenum, maximum hardness, tensile strength and yield strength of the alloy plate at room temperature were enhanced by 20%, 32% and 54%, respectively. The plasticity increased initially and then decreased with recovery and recrystallization. The strength and reduction of area of alloy annealed at 1400 °C were 25% and 100% higher than those of pure molybdenum, respectively. ZrO2 in the alloy demonstrated an obvious hindering effect on recrystallization, which could effectively improve recrystallization strength and recrystallization plasticity of the recrystallized plate.