Study on the structure and mechanical properties of magnesia partially stabilized zirconia during cyclic heating and cooling

Study on the structure and mechanical properties of magnesia partially stabilized zirconia during cyclic heating and cooling
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氧化镁部分稳定氧化锆循环加热和冷却过程中的结构和力学性能研究

DOI:
10.1016/j.matlet.2017.01.135
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发表时间:
2017-05
期刊:
Materials Letters,
影响因子:
--
通讯作者:
Ren ZHongming
Ren ZHongming
中科院分区:
其他
文献类型:
--
作者:
Lan Jiang;Guo Shuqiang;Ren ZHongming

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研究了在真空气氛下,从室温到1723K的循环加热和循环冷却过程中,氧化镁部分稳定氧化锆(MgO-PSZ)陶瓷的结构和力学性能。随着循环次数的增加,MgO-PSZ的m相数量增加,抗弯强度降低。在循环加热和循环冷却过程中,MgO-PSZ中的t相和m相之间发生相变,体积变化较大,导致单斜晶相增多,抗弯强度降低。
The structure and mechanical properties of magnesia partially stabilized zirconia (MgO-PSZ) ceramic were investigated under a vacuum atmosphere during cyclic heating and cooling from room temperature to 1723 K. It is found that Mg ions in ZrO2lattice diffused to grain boundaries during cyclic heating and cooling. With increasing the number of cycles, the amount of m-phase of MgO-PSZ increased and the bending strength of MgO-PSZ decreased. The phase transformation in MgO-PSZ between t-phase and m-phase occurred with a large volume change during cyclic heating and cooling, which led to the increase of monoclinic phase and the decrease of bending strength of MgO-PSZ.
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