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3、相界面 要通晓相变理论,自然必须对相界面的结构和特性有一个比较透彻的了解。正如本讲开始所强调,相变的形核、长大阶段实际上是相界面的建立和迁移的过程,而这种建立和迁移的过程是与相界面的结构和特性密切相关的。 相界面和上述晶界的区别是显而易见的,这种区别在于相界面所分隔的是具有不同化学成分或同时具有不同晶体结构的两个“相”。
3, the phase interface to be familiar with the theory of phase change, of course, must have a more thorough understanding of the structure and characteristics of the phase interface. As the beginning of this article emphasizes, the nucleation and growth stage of phase transition is actually the process of establishment and migration of phase interfaces. The process of establishment and relocation is closely related to the structure and characteristics of phase interfaces. The difference between the phase interface and the above grain boundaries is obvious, with the difference that the phase interface separates two “phases” with different chemical compositions or with different crystal structures simultaneously.