Si-Ca,Si-Ba及Ca-Ba二元合金熔体组元活度的计算  

Calculation of Component Activities in Si-Ca, Si-Ba and Ca-Ba Binary Alloy Melts

作　　者：姜周华[1] 刘杨[1] 李阳[1] 梁连科[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第3期252-255,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金与上海宝钢集团公司联合资助项目(No.50174012).

摘　　要：根据Miedema二元合金生成热模型,结合相关热力学数据,对硅钙钡系中的每个二元合金在1623K下的活度进行计算·结果表明,采用该模型对Si Ca合金活度的计算结果与实测结果吻合较好,Si Ca合金与Si Ba合金计算结果相对于理想熔体有较大负偏差,说明Ca及Ba原子与Si原子都有很强的相互作用,Ba Ca合金熔体在整个成分范围内较为接近理想熔体,Ca原子与Ba原子相互作用不大·Based on Miedema for calculating the formation heat of binary alloy system, the activity of each and every binary system in the Si-Ca-Ba alloy system was calculated at 1?623?K combining with related thermodynamic data. The calculation results showed that although the activity of Si-Ca alloy confirms fairly with measured data, the activity curves of Si-Ca and Si-Ba alloy melts show relatively great negative deviation from the idea melt. It means that there is a strong interaction between Ca and Si atoms and between Ba and Si atoms. In comparison, the Ba-Ca melt comes nearer to the idea melt in the whole range of composition, and the interaction between Ca and Ba atoms is weaker.

关 键 词：含钡合金 脱氧 合金熔体 MIEDEMA模型 活度 热力学数据 

分 类 号：TF111.15[冶金工程—冶金物理化学]