摘要
本文用非平衡统计理论研究二元合金凝固时界面的溶质分配，得到了一般情况下溶质分配系数K与时间t的函数关系。当t→∞时，K就成为平衡溶质分配系数K0，在t大于热平衡弛豫时间ξ、小于结构平衡弛豫时间ξ0的时间区间内，K对K0的偏离随过热度ΔT的增大而增大，与实验结果一致。
The solute distribution at the S/L interface is studied with stochastic dynamics. A general fuction relation between the solute distribution coefficient K and time t is given. The deviation of K from K0 (t→∞, K=K0) at the time t, being greater than the thermal equilibrium relaxation time ξ and smaller than the structural equilibrium relaxatin time ξ0, is also discussed. It has come to the conclusion that the deviation of K from K0, in K/K0, increases with increasing superheating temperature. This is in agreement with the result of experiment.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第5期455-460,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金!69488007
