Martensitic transformation in zirconia -: Part I.: Nanometer scale prediction and measurement of transformation induced relief
Martensitic transformation in zirconia -: Part I.: Nanometer scale prediction and measurement of transformation induced relief
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DOI：
10.1016/j.actamat.2004.08.034
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发表时间：
2004-11-08
期刊：
影响因子：
9.4
通讯作者：
Chevalier, K
中科院分区：
文献类型：
--
作者：
Deville, S;Guénin, G;Chevalier, K
我们用原子力显微镜(AFM)研究了CeO_2稳定的氧化锆在高温高压下老化引起的马氏体四方相变到单斜相的表面起伏。原子力显微镜是定量研究马氏体形变的有力工具，具有很高的精度。对于晶格对应ABc1的特殊情况，用晶体唯象理论预测了相变引起的预期浮雕，其中四方e轴变成了单斜c轴。提出了这种晶格对应的变种空间排列模型，并通过实验观测进行了验证。定量计算结果与原子力显微镜在纳米尺度上的实验测量结果吻合较好。所有观测到的特征都通过计算得到了充分的定量解释，在测量和计算精度范围内，计算与定量实验测量之间存在差异。特别是，相变晶粒的晶体取向是由相变诱导浮雕的局部特征决定的。最后证明，应变能是该材料低温高压处理引起表面相变的控制因素。(C)2004年Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
We investigate by atomic force microscopy (AFM) the surface relief resulting from martensitic tetragonal to monoclinic phase transformation induced by low temperature autoclave aging in ceria-stabilized zirconia. AFM appears as a very powerful tool to investigate martensite relief quantitatively and with a great precision. The crystallographic phenomenological theory is used to predict the expected relief induced by the transformation, for the particular case of lattice correspondence ABC1, where tetragonal e axis becomes the monoclinic c axis. A model for variants spatial arrangement for this lattice correspondence is proposed and validated by the experimental observations. An excellent agreement is found between the quantitative calculations outputs and the experimental measurements at nanometer scale yielded by AFM. All the observed features are explained fully quantitatively by the calculations, with discrepancies between calculations and quantitative experimental measurements within the measurements and calculations precision range. In particular, the crystallographic orientation of the transformed grains is determined from the local characteristics of transformation induced relief. It is finally demonstrated that the strain energy is the controlling factor of the surface transformation induced by low temperature autoclave treatments in this material. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.