English

应用科学学报 ›› 1999, Vol. 17 ›› Issue (1): 103-107.

• 论文 • 上一篇    下一篇

非晶态材料分相机理的理论探讨

段仁官1, 梁开明1, 顾守仁1, 陈玄令2   

  1. 1. 清华大学;
    2. 辽宁省建筑工程学校
  • 收稿日期:1997-08-15 修回日期:1998-01-25 出版日期:1999-03-31 发布日期:1999-03-31

Study on the Mechanism of Phase Separation of Non-Crystalline Materials

DUAN RENGUAN1, LIANG KAIMING1, GU SHOUREN1, CHEN XUANLING2   

  1. 1. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084;
    2. Liao Ning Construction Engineering School, Liao Yang 111000
  • Received:1997-08-15 Revised:1998-01-25 Online:1999-03-31 Published:1999-03-31

PDF

84

被引次数

2

摘要： 从经典的形核生长动力学和Cahn的调幅分解线性动力学理论出发,经数学推导得到如下结论:在分相的扩散阶段初期,按调幅分解机理进行的分相过程,其不均区域尺寸与时间的关系没有一定的规律,而按形核生长机理进行的分相过程,其不均区域尺寸的平方与时间成正比关系.该结论利用他人实验数据得到了初步验证.

关键词: 形核生长, 动力学, 调幅分解, 分相

Abstract: According to the classical theory of linearized spinodal decomposition kinetics and nucleation -growth kinetics, after a series of mathematical calculation, the following results were obtained. When the phase separation began to advance in the field of unstable(spinodal), there was not a regular relation between the size of non-uniform region and the time, but in the field of metastable(nucleation-growth), the square of the size of non -uniform region was in proportion to the time. The rightness of above results was tested by experiments in the related references.

Key words: spinodal decomposition, nucleation-growth, kinetics, phase separation