Behavior of Element Vaporization and Composition Control of Fe-Ga Alloy during Vacuum Smelting  

作　　者：Jian-wu YAN Liang LUO A-fang PENG Chen-shu ZHANG Qing-hua CAO 

机构地区：[1]Jiangxi Province Key Laboratory of Precision Drive and Control [2]Institute of Micro/Nano Actuation and Control, Nanchang Institute of Technology [3]School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University

出　　处：《Journal of Iron and Steel Research International》2015年第11期983-989,共7页

基　　金：Item Sponsored by National Natural Science Foundation of China(51161019);Project of Department of Science and Technology of Jiangxi Province of China(20133BBE50011);Project of Department of Science & Technology of Jiangxi Province of China(20141BDH80025)

摘　　要：Saturated vapor pressure, critical evaporation temperature and evaporation loss rate of Fe-Ga alloy were calculated under different conditions of Ga and Fe contents with activity coefficients. The relationship between the change of Ga content and melting time was determined. The results demonstrated that saturated vapor pressure of Ga was higher than that of Fe under the same conditions. The difference value of critical evaporation temperature of Ga with and without Ar was nearly 800 K. The critical evaporation temperature of Fe was higher than that of Ga under vacuum, indicating that Ga was more volatile than Fe. At 1800 K, the evaporation rate of Ga was 84 times higher than that of Fe in the melt of Fe81Ga19 alloy. Under this condition, the change of Ga content and smelting time kept a linear relationship. The higher the temperature was, the faster the Ga content decreased, which was consistent with theoretical calculations.Saturated vapor pressure, critical evaporation temperature and evaporation loss rate of Fe-Ga alloy were calculated under different conditions of Ga and Fe contents with activity coefficients. The relationship between the change of Ga content and melting time was determined. The results demonstrated that saturated vapor pressure of Ga was higher than that of Fe under the same conditions. The difference value of critical evaporation temperature of Ga with and without Ar was nearly 800 K. The critical evaporation temperature of Fe was higher than that of Ga under vacuum, indicating that Ga was more volatile than Fe. At 1800 K, the evaporation rate of Ga was 84 times higher than that of Fe in the melt of Fe81Ga19 alloy. Under this condition, the change of Ga content and smelting time kept a linear relationship. The higher the temperature was, the faster the Ga content decreased, which was consistent with theoretical calculations.

关 键 词：Fe-Ga alloy vacuum smelting critical evaporation temperature saturated vapor pressure smelting time 

分 类 号：TF131[冶金工程—冶金物理化学]