确定了超过冷条件下晶体组织的骤然细化起因于大过冷度下的高形核率。
The sudden refinement of crystal structure is determined by the high nucleation rate under large undercooling.
通过高斯分布函数描述形核质点密度随温度的分布关系，在给定过冷度时对分布函数求积分可得该时刻的形核密度。
Gauss distribution function was employed to describe the relation between the density of nucleation sites and the temperature and was integrated to get the grain density at a given undercooling.
就无机水合盐的过冷机理及非均匀形核的动力学机理进行了探讨，加入成核剂是降低过冷度的有效措施。
This paper discusses the nucleating mechanisms of the salt hydrates and comes to the conclusion that adding suitable nucleating agents reduces significantly the degree of supercooling.
通过讨论过冷度的变化对形核率的影响，研究了电流产生的电磁力效应及焦耳热效应对过冷度的影响，建立了电流与过冷度的关系式。
According to classical solidification theory and the mechanism of solidification microstructure under pulse current, the effect of super-cooling degree variation on nucleation rate was discussed.
结果表明，超高冷却速率使过冷度变大，形核率升高，新相形核主要以晶内形核为主。
It was demonstrated that condensate depression and nucleation rate increase with increasing cooling velocity and intracrystalline nucleation is main nucleation form of the new phase.
结果表明，超高冷却速率使过冷度变大，形核率升高，新相形核主要以晶内形核为主。
It was demonstrated that condensate depression and nucleation rate increase with increasing cooling velocity and intracrystalline nucleation is main nucleation form of the new phase.
应用推荐