In Situ Martensitic Transformation in a Ternary MgO‐Y2O3‐ZrO2 Alloy: I, Transformation in Tetragonal ZrO2 Grains
In Situ Martensitic Transformation in a Ternary MgO‐Y2O3‐ZrO2 Alloy: I, Transformation in Tetragonal ZrO2 Grains
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三元 MgO-Y2O3-ZrO2 合金中的原位马氏体相变：I，四方 ZrO2 晶粒中的相变
DOI：
10.1111/j.1151-2916.1988.tb06390.x
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发表时间：
1988
影响因子：
3.9
通讯作者：
A. Heuer
中科院分区：
文献类型：
--
作者：
R. Lee;A. Heuer
用透射电镜原位观察研究了MgO-Y/sub 2/O/sub 3/-ZrO/sub 2/合金中四元ZrO/sub 2/晶粒的马氏体相变。相变是通过单斜板条的形核和长大过程发生的，通过连续改变外加应力，可以在不同的相变程度上维持热弹性平衡。产品相总是孪生的，但发现两种孪生机制-连续形成的孪生相关的变体和相变后变形孪生。在一个实例中，（401）/（410）对马氏体惯习平面导致（100）结合孪晶平面。
The martensitic transformation in tetragonal ZrO/sub 2/ grains in a ternary MgO-Y/sub 2/O/sub 3/-ZrO/sub 2/ alloy has been studied using in situ observations in the transmission electron microscope. Transformation occurred by the nucleation and growth of monoclinic laths; thermoelastic equilibrium can be maintained at different extents of transformation by continuously varying the applied stress. The product phase was always twinned, but two twinning mechanisms were found - sequential formation of twin-related variants and posttransformation deformation twinning. In one example, a (401)/(410) pair of martensite habit planes led to a (100) conjunction twinning plane.