研究了6YSZ、(6Y-Mg)-ZrO2和6YSZ-MgAl2O4复相材料热震处理对力学性能和微观结构的影响.通过XRD和SEM对材料物相和结构的表征,阐明了6YSZ陶瓷在热处理后断裂特性突变的机理.实验结果表明,ZrO2陶瓷在1200～1400℃高温热震处理后,由于热韧化和马氏体相变会出现重烧结,使材料弯曲强度热增大;ZrO2与少量不共溶MgAl2O4形成的复相材料在高温热震处理后会出现明显的热失配现象,使材料的力学性能下降.
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