| Si-Ca,Si-Ba及Ca-Ba二元合金熔体组元活度的计算 |
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| 引用本文： | 姜周华,刘杨,李阳,梁连科.Si-Ca,Si-Ba及Ca-Ba二元合金熔体组元活度的计算[J].东北大学学报(自然科学版),2005,26(3):252-255. |
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| 作者姓名： | 姜周华 刘杨 李阳 梁连科 |
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| 作者单位： | 东北大学,材料与冶金学院,辽宁,沈阳,110004;东北大学,材料与冶金学院,辽宁,沈阳,110004;东北大学,材料与冶金学院,辽宁,沈阳,110004;东北大学,材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家自然科学基金，上海宝钢集团公司资助项目 |
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| 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·
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| 关 键 词： | 含钡合金 脱氧 合金熔体 Miedema模型 活度 热力学数据 |
| 文章编号： | 1005-3026(2005)03-0252-04 |
| 修稿时间： | 2004年6月1日 |
Calculation of Component Activities in Si-Ca, Si-Ba and Ca-Ba Binary Alloy Melts |
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| JIANG Zhou-hua,LIU Yang,LI Yang,LIANG Lian-ke.Calculation of Component Activities in Si-Ca, Si-Ba and Ca-Ba Binary Alloy Melts[J].Journal of Northeastern University(Natural Science),2005,26(3):252-255. |
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| Authors: | JIANG Zhou-hua LIU Yang LI Yang LIANG Lian-ke |
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| Institution: | (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China |
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| Abstract: | 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 1623 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. |
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| Keywords: | barium-bearing alloy deoxidation alloy melt Miedema model activity thermodynamic data |
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