本文利用电子万能试验机、扫描电子显微镜(SEM)等手段对可切削LaPO4/Y-ZrO2陶瓷复合材料的力学性能、可加工性及其机理进行了研究.结果表明:随着LaPO4含量的增加复合陶瓷的力学性能逐渐下降,可加工性逐渐增加.当LaPO4含量达到30%时,复合陶瓷维持较高的力学性能,其弯曲强度和断裂韧性分别为337.98 MPa和7.2 MPa·m1/2,且具有一定可加工性,其钻削速率为0.014 mm·s-1.当LaPO4含量为50%时复合陶瓷可加工性明显提高,但力学性能下降幅度较大.LaPO4晶粒所具有的层片状断裂性能,强弱界面处裂纹的不连续扩展性及微裂纹扩展出现连通是LaPO4/Y-ZrO2复合陶瓷具有良好的可加工性的主要原因.
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