局域平衡原理与相图的扩散偶法测定

介绍了局域平衡原理和扩散偶法测定平衡相图的方法要点.扩散偶法是一种高效的、可靠的相图测定方法,它可以大幅度减少实验工作量,减少原材料消耗,加快相图实测进程.此外,这种方法还具有可直接测定相平衡关系、相平衡成分,避免“过冷效应”等优点,特别适合于多组元系统平衡相图的实验测定.

Local phase equilibrium principle and diffusion couple method for determination of phase diagrams

The local phase equilibrium principle is recommended as well as the outline of the method of diffusion couples in determining the equilibrium phase diagram. The method of diffusion couples is highly efficient and reliable in determining the phase diagram. It can be achieved by means of diffusion couples that the experimental work and the consumption of the raw and processed materials were largely reduced, and the determination of the experimental phase diagram was expedited. Besides, there are many advantages of the method of diffusion couples that the phase equilibrium relationship and phase equilibrium composition are directly measured, and the super-cooling effect can be avoided. Therefore, it is especially appropriate to determine the equilibrium phase diagram of multi-component systems experimentally by using the method of diffusion couples.