采用超重力下燃烧合成技术,通过调整ZrO2体积分数,制备出不同成分与显微组织形态的ZrO2(4Y)/Al2O3复合陶瓷,研究了材料成分,显微组织与力学性能之间的关系.XRD、SEM和EDS结果表明:当ZrO2体积分数低于37%,陶瓷熔体生成为生长取向各异且以ZrO2四方相亚微米纤维镶嵌于α-Al2O3上的棒状共晶团为基体的复合陶瓷;当ZrO2体积分数高于40%,复合陶瓷基体则生长为略呈球形的ZrO2四方相微米晶粒.性能测试结果显示,随着ZrO2体积分数增加,陶瓷相对密度逐渐降低,陶瓷硬度与断裂韧性均在ZrO2体积分数为33%时出现最高值,而陶瓷弯曲强度则在ZrO2体积分数为29%达到最大值.
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