摘要
本文通过理论分析,导出了共晶生长条件下液相中溶质分布规律的一般表达式。理论结果表明,在快速生长条件下,λ~2V 不为常数,与生长速度 V、分配系数 K 和相体积比 f 等因素有关。Jackson—Hunt 模型中的λΔT、(ΔT^2)/V 关系在一般条件下应为λ(ΔT-ms)、(ΔT-ms)~2/V。在快速凝固条件下λ(ΔT-ms)和(ΔT-ms)~2/V 均不为常数,与 V、K、f 等因素有关。
The general formula of solute distribution in liquid phase of eutectic growth has been derived in this paper.It is shown that under rapid growth conditions,λ~2V≠constant,λ~2V is the function of growth velocity,V,parti- tion ratio,k,the ratio of phase volume,f,and other factors.Under the general conditions,λ△T and △T^2/V should be substituted by λ(△T-ms) and (△T-ms)~/V respectively,and λ(△T-ms)and (△T-ms)~2/V are related to V,k,f and other factors.
基金
国家自然科学基金(批准号5870004)资助的课题
