以TiO2、Al、C(石墨)为原料,首先采用高能球磨引导铝热反应合成了Al2O3-TiC纳米复合粉体,然后采用放电等离子体烧结纳米复合粉体制备了Al2O3-TiC复合材料.结果表明,在氩气氛围下高能球磨3h后,原料粉末就发生了铝热反应,合成的Al2O3-TiC复合粉体粒子尺寸大约在100nm左右.采用SPS技术在1450℃保温4min烧结的试样致密度达99.6%,并且结构精细(大部分晶粒<1μm),两相分布比较均匀,有较好的力学性能和电导性能,抗弯强度为650+21MPa,硬度为19.1±0.2GPa,断裂韧性为4.5±0.2MPa·m1/2,电导率为2.3828×105Ω-1.m-1.
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