以空气为淬冷介质,用淬冷-强度法研究了LaPO4添加量对粗晶ZrO2 (4Y)陶瓷抗热震性能的影响.结果表明,原料粒度为1.5 μm的ZrO2陶瓷,其抗热震性能随LaPO4添加量的增加逐渐提高.LaPO4添加量为20 vol％时,陶瓷的临界抗热震温差达1300 ℃,比单一ZrO2陶瓷提高了400℃.ZrO2 -LaPO4复相陶瓷抗热震性能的提高主要是由于LaPO4晶体的层间解理以及弱界面开裂分散了热应力,耗散了热震裂纹扩展的能量.
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