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Effect of the ratio of two nanosize parameters on the phase transformations
Scripta Materialia ( IF 6 ) Pub Date : 2018-05-01 , DOI: 10.1016/j.scriptamat.2017.08.035
Valery I. Levitas

Abstract We review findings obtained within an advanced Ginzburg-Landau theory that the ratio of two nanoscale parameters (e.g., width of two different interfaces or width of the interface and the Burgers vector of interfacial dislocations) drastically affects transformation nano and macroscale behavior. The ratio of two nanoscale lengths induces new phenomena, changes transformation parameters and mechanisms, and should be considered as a new dimension in a “phase diagram.” Examples include surface-induced melting of nanoparticles and martensitic transformations, solid-solid transformation via an intermediate phase, and interaction between phase interface and dislocations.

中文翻译:

两个纳米尺寸参数之比对相变的影响

摘要 我们回顾了在先进的 Ginzburg-Landau 理论中获得的发现,即两个纳米级参数的比率(例如,两个不同界面的宽度或界面的宽度和界面位错的 Burgers 矢量)极大地影响了纳米级和宏观级的转变行为。两个纳米级长度的比率会引发新现象,改变转换参数和机制,应将其视为“相图中”的一个新维度。例子包括纳米颗粒的表面诱导熔化和马氏体转变、通过中间相的固-固转变以及相界面和位错之间的相互作用。
更新日期:2018-05-01
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