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采用粉末冶金方法以钼粉和氧化锆粉为原料制备30Mo-ZrO_2金属陶瓷,研究烧结次数对金属陶瓷微观结构和高温电导率的影响。结果表明,烧结次数为3次的试样密度最大(6.41 g/cm~3),高温电导率最高(1 600℃时电导率为12.50×10~(-3)S/cm);增加烧结次数能改变粉体颗粒形态,提高金属陶瓷致密度,降低孔隙率,提高导电相的相对体积分数,增加材料电导率;金属陶瓷电导率随着温度升高而增大,变化幅度随着温度的升高而增加。
The powder metallurgy method was used to prepare 30Mo-ZrO_2 cermet with molybdenum powder and zirconia powder as raw materials to study the effect of sintering times on the microstructure and high-temperature conductivity of cermets. The results show that the highest density (6.41 g / cm ~ 3) and the highest conductivity (12.50 × 10 -3 S / cm at 1 600 ℃) Can change the morphology of the powder particles, increase the density of the cermet, reduce the porosity, increase the relative volume fraction of the conductive phase, and increase the conductivity of the material. The conductivity of the cermet increases with increasing temperature, High and increase.