界面扩散控制晶粒生长动力学的计算机模拟

Computer Simulation on Grain Growth Kinetics Controlled by Interphase Diffusion

建立一个模拟晶粒生长过程的三维计算机模型．利用该模型可以方便地模拟不同条件下的晶粒生长过程．对不同温度、体积分数和激活能条件下的生长过程进行了模拟运算，结果表明：三维粒尺寸ｒ随时间ｔ演化的生长过程满足关系ｒ－ｔ~１／ｎ，ｎ的值约为６．该模型的计算机模拟对纳米相生长动力学等实验具有一定的理论预见和指导意义。

A three-dimensional computer model simulating the grain growth kinetics controlled by interphase diffusion was developed. We simulated the growing process of nano-cluster ensemble under different initial temperature, volume fraction and activated energy. It turns out that there exists a rela-tionship between size r of nano-cluster and time t as r-t^1/n, and the value of n is about 6.