摘要
将Ａｌ－Ｓｉ－Ｆｅ三元合金熔体中组元Ａｌ的过剩偏摩尔自由能表达成多项式函数的形式，再由组成该三元系的三个二元子系以及三元系部分实验结果作为边界条件确定多项式中的参数Ａｊｋ值。根据Ｇｉｂｂｓ－Ｄｕｈｅｍ方程导出了计算体系过剩摩尔自由能多项式中的参数Ｆｊｋ值，由Ａｊｋ和Ｆｊｋ值求得组元Ｓｉ、Ａｌ的过剩偏摩尔自由能的表达式。
Expressing the partial molar excess Gibbs energy of component Al in Al-Si-Fe ternary alloy as a polynomial, then the coefficients A jk involved in the polynomial were determined based on the experimental date in ternary system and three selected binary subsystems through a least-squares technique. The coefficients F jk contained in the polynomial of excess molar free energy of alloy were drawn in the light of Gibbs-Duhem equation. The partial molar excss Gibbs energy for the components Si and Fe can be calculated by use of the coefficients A jk and F jk through a modified 'I-D' approach. In present analytical model, the iso-activity lines of three component in the Al-Si-Fe ternary alloy were calculated in the whole homogeneous region.
出处
《有色金属（冶炼部分）》
CAS
北大核心
1997年第1期28-31,F003,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
浙江省自然科学基金
