利用放电等离子烧结技术制备了氧化锆陶瓷,研究了应力诱导相变对氧化锆陶瓷断裂韧性的影响.结果表明,ZrO2陶瓷在应力诱导下可发生应力诱导相变,且应力诱导相变量随烧结温度和晶粒尺寸增加而增大.应力诱导相变可提高ZrO2陶瓷材料的断裂韧性,在1300℃时,晶粒尺寸、应力诱导相变量、断裂韧性分别为0.36 μm、4.85％、3.05 MPa·m-0.5;在1500℃时,晶粒尺寸、应力诱导相变量、断裂韧性分别为1.29 μm、17.49％、4.80 MPa·m-0.5,其中断裂韧性相比前者提高了57.4％.
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