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Preparation of Sm2Fe17Alloys in Ca-Sm2O3-Fe System

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【作者】 邓庚凤； 孙光飞； 陈菊芳； 祁毓俊； 庞利佳； 方克明；

【Author】 Deng Gengfeng ~ 1, 2*, Sun Guangfei ~3, Chen Jufang ~3, Qi Yujun ~3, Pan Lijia ~3, Fang Keming ~1 (1. School of Materials and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2. School of Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)

【机构】 School of Materials and Chemical Engineering； Jiangxi University of Science and Technology； Ganzhou 341000； China； School of Metallurgy； University of Science and Technology Beijing； Beijing 100083； China； School of Materials Science and Engineering； School of Materials and Chemical Engineering；

【Abstract】 Thermodynamics and kinetics for the preparation of Sm2Fe 17 alloys by reduction-diffusion （R-D） method in Ca-Sm2O3-Fe System were investigated. With increasing reaction temperature, it is found that the reaction rate of R-D and the amount of Sm in the Sm2Fe 17 alloy increase, and the increased amount at lower temperature is higher than that at higher temperature. Moreover, results from contracting core model show that the peritectic reaction between Sm and Fe is a rate-determined step in the whole R-D process. The apparent activation energy and the pre-exponential factor for this reaction are 73.74 kJ·mol -1 and 7.79×10 -3 respectively. [BT(4+1]

【关键词】 rare earth permanent magnet material； Sm2Fe 17 compound； reduction-diffusion； contracting core model； rare earths；
【Key words】 rare earth permanent magnet material； Sm2Fe 17 compound； reduction-diffusion； contracting core model； rare earths；
【基金】 ProjectsupportedbytheNaturalScienceFoundationofChina(2032011)andthe863NanometerProgramofChina(2002AA302602)
  • 【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2005年05期
  • 【分类号】TG132.2
  • 【下载频次】34
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