以Al2O3-ZrO2复合粉末、W、Cr、Ni、Co粉末为原料,采用热压烧结工艺制备了性能优良的Al2O3-ZrO2/W/Cr/Ni/Co金属陶瓷复合材料.通过SEM,EDS,XRD等手段分析其微观组织,单边梁开口法(SENB)测量其断裂韧性.实验结果表明在1320℃,20MPa条件下热压烧结制备的Al2O3-ZrO2/W/Cr/Ni/CO金属陶瓷的断裂韧性为7.16±0.4MPa·m1/2,硬度为83.3HRA,横向断裂强度为540MPa,相对致密度为97.4%;对维氏压痕下裂纹扩展进行了分析,其增韧机理为延性金属对裂纹的桥梁作用和氧化锆相变增韧,在裂纹通过时硬质相以沿晶断裂为主.
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