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| 铁液非均质形核的热力学研究 | |
| 引用本文： | 黄诚,宋波,毛璟红,赵沛.铁液非均质形核的热力学研究[J].北京科技大学学报,2003,25(2):127-130. |
| 作者姓名： | 黄诚 宋波 毛璟红 赵沛 |
| 作者单位： | 1. 北京科技大学冶金学院,北京,100083 2. 北京科技大学材料科学与工程学院,北京,100083 3. 钢铁研究总院,北京,100081 |
| 基金项目： | 国家重点基础研究发展计划(973计划);J1998061511-2; |
| 摘 要： | 利用电解纯铁，通过高温钼丝炉制备了含有不同种类、不同含量异质核心的试祥．利用差热分析方法测定了试样在相同冷却速度条件下的过冷度．从理论上比较了铁液凝固热力学驱动力的不同计算方法及误差，计算了铁液在凝固过程中的热力学驱动力，形核功和临界晶核半径． |
| 关 键 词： | 冶金工业 铁液 非均质形核 凝固过程 热力学驱动力 形核功 临界晶核半径 过冷度 |
| 修稿时间： | 2002年5月23日 |
Thermodynamics of Heterogeneous Nucleation of Liquid Iron in Solidification |
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| HUANG Cheng,SONG Bo,MAO Jinghong,ZHAO Pei Metallurgy School,University of Science and Technology Beijing,Beijing ,China Material Science and Engineering School,University of Science and Technology Beijing,Beijing ,China Central Iron and Steel Research Institute,Beijing ,China.Thermodynamics of Heterogeneous Nucleation of Liquid Iron in Solidification[J].Journal of University of Science and Technology Beijing,2003,25(2):127-130. | |
| Authors: | HUANG Cheng SONG Bo MAO Jinghong ZHAO Pei Metallurgy School University of Science and Technology Beijing Beijing China Material Science and Engineering School University of Science and Technology Beijing Beijing China Central Iron and Steel Research Institute Beijing China |
| Institution: | HUANG Cheng,SONG Bo,MAO Jinghong,ZHAO Pei 1) Metallurgy School,University of Science and Technology Beijing,Beijing 100083,China 2) Material Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China 3) Central Iron and Steel Research Institute,Beijing 100081,China |
| Abstract: | By using of electrolytic pure iron, the specimen containing different heterogeneous nucleus and contents were made in an Mo wire furnace. The DTA method was employed to measure the undercooling of liquid iron during solidification. Equations to calculate the change of Gibbs free energy of solid and liquid iron in solidification were reviewed theoretically. Calculations were performed to obtain Gibbs free energy difference between solid and liquid, critical radius of nucleus and the activation energy in solidification. |
| Keywords: | pure iron activation energy critical radius undercooling |
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