| Thermodynamic analysis of Ti powder synthesized by SHS thermitreaction |
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| 作者姓名： | 张鹏林 夏天东 张国栋 闫丽静 赵文军 |
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| 作者单位： | [1]State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China [2]Key Laboratory of Non-ferrous Metal Alloys, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China [3]College of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China |
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| 摘 要： |
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| 关 键 词： | 高温合成技术 热力学分析 隔热技术 镁 铝 合金 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Thermodynamic analysis of Ti powder synthesized by SHS thermitreaction |
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| ZHANG Peng-lin, XIA Tian-dong, ZHANG Guo-dong, YAN Li-jing, ZHA Wen-jun.Thermodynamic analysis of Ti powder synthesized by SHS thermitreaction[J].Transactions of Nonferrous Metals Society of China,2007,17(A01):27-31. |
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| Authors: | ZHANG Peng-lin XIA Tian-dong ZHANG Guo-dong YAN Li-jing ZHA Wen-jun |
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| Affiliation: | ZHANG Peng-lin, XIA Tian-dong, ZHANG Guo-dong, YAN Li-jing, ZHA0 Wen-jun |
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| Abstract: | According to the thermodynamics theories, the reactive Gibbs free energies, the reactive adiabatic temperature, the melting rate of Ti and the gasification mass of Mg in the Mg-TiO2 and AI-TiO2 systems were theoretically calculated and analyzed respectively. The results show that the reactions of Mg-TiO2 and AI-TiO2 are very easy to take place and the reaction of producing various suboxides of Ti may occur in Mg-TiO2 and AI-TiO2 reaction system; the adiabatic temperature of Mg-TiO2 becomes lower with increasing mass fraction of Mg. The adiabatic temperature is below 1 800 K when the mass fraction of excessive Mg exceeds 25%; The adiabatic temperature of AI-TiO2 also becomes lower with increasing mass fraction of AI, but it becomes higher with the preheat temperature increment. The adiabatic temperature plateau is the result of Ti melting endotherm; owing to the gasification of a great deal of Mg in Mg-TiO2 reaction process, Mg should be properly excessive in order to get Ti. |
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