The nature and role of incoherent interphase interfaces in diffusional solid-solid phase transformations
The nature and role of incoherent interphase interfaces in diffusional solid-solid phase transformations
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DOI：
10.1007/s11661-006-0055-5
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
T. B. Massalski;D. Laughlin;W. Soffa
中科院分区：
文献类型：
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作者：
T. B. Massalski;D. Laughlin;W. Soffa
在本文中，探讨了关于不相干相间界面的性质及其在控制固态扩散转变（重构转变）中微观结构演化的成核和生长过程中的作用的一些观点。有人认为，本质上不相干的界面可能涉及多晶型转变和大量转变的引发和传播，以及金属和陶瓷系统中的各种沉淀现象。早期在大规模转型研究中已经提出了类似的观点。在成核和生长过程中沿相间界面的刻面可以源自与共轭相的双晶无关的热力学、动力学和晶体学因素。这种特异形行为可能与晶间相和晶内相的形成有关。通过平面边到边/行匹配进行一维 (1-D) 相位补偿的概念是相干性和双晶学经典思想的有趣扩展，对于表征某些类型边界的行为具有潜在的重要意义。然而，这些几何关系在实空间和倒易空间中的一般重要性将取决于与这些特殊边界相关的定向空间中的能量井的深度。
In this article, some views on the nature of incoherent interphase interfaces, and their role in the nucleation and growth processes governing the evolution of microstructure in solid-state diffusional transformations (reconstructive transformations), are explored. It is argued that essentially incoherent interfaces can be involved in the initiation and propagation of polymorphic transformations and massive transformations as well as in various precipitation phenomena in metallic and ceramic systems. Similar views have already been advanced earlier in connection with studies of massive transformations. Faceting along the interphase interface during nucleation and growth can derive from thermodynamic, kinetic, and crystallographic factors independent of the bicrystallography of the conjugate phases. This idiomorphic behavior can be relevant to both intergranular and intragranular phase formation. The concept of one-dimensional (1-D) commensuration of phases through plane edge-to-edge/row matching is an interesting extension of the classic ideas of coherency and bicrystallography and potentially important in characterizing the behavior of certain types of boundaries. However, the general importance of these geometrical relations in real and reciprocal space will depend on the depth of the energy wells in orientation space associated with these special boundaries.