本文采用常压烧结工艺制备ZrO2增韧莫来石陶瓷(ZTM).通过调整ZrO2、Y2O3含量制得不同组成的ZTM材料,其强度随ZrO2加入量的增加经历了先上升而后下降的过程.在不同组成下,材料的强韧化机理不同.当ZrO2≤30vol%时,ZTM材料是以应力诱导相变增韧为主;ZrO2＞30vol%(如ZT M40(2Y)),材料则以微裂纹,裂纹偏转等强韧化机理为主;并且分散相ZrO2晶粒的大小及分布均匀性等对强韧化机理的发挥有很大影响.
参考文献
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