采用真空热压烧结技术制备了纳米TiC体积分数为3％～5％的Al2O3/TiC/Mo/Ni微纳陶瓷复合材料,并对其力学性能、相对密度、微观结构和三点弯曲断口形貌进行了研究.结果表明:微纳陶瓷复合材料中存在非典型的灰芯/白环结构;复合材料的断裂方式为穿晶断裂和沿晶断裂的混合形式;添加的纳米粒子分布于Al2O3基体晶粒的内部与晶界,形成了晶内/晶界型结构,细化了晶粒,强化了晶界,提高了复合材料的强度和相对密度,其抗弯强度、断裂韧度、硬度和相对密度分别为970 MPa,5.5 MPa· m1/2,20.4 GPa和99.5％.
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