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中文摘要：
采用超重力下自挤压辅助燃烧合成技术,通过抑制陶瓷熔体在封闭空间内发生体积凝固,可以成功制备出低缺陷、大体积Al2O3-ZrO2(Y2O3)共晶陶瓷。XRD、SEM与EDS分析表明,随着自挤压力增大,陶瓷中可相变的ZrO2四方相体积分数明显增加,构成陶瓷基体的棒状共晶团得以细化,且其体积分数与长径比也随之增加,而处于共晶团之间的玻璃相体积分数则显著降低,且分布于共晶团边界上的不规则ZrO2相发生细化、球化,从而使陶瓷弯曲强度、硬度和断裂韧性在超重力200g(g为重力加速度9.8m·s-2)下随自挤压力升高而增大,当自挤压力为0.8MPa时均达到最大值,分别为(1050±105)MPa、(17.8±1.5)GPa和(14.2±1.0)MPa·m1/2。
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