Preparation of Sm_2Fe_(17)Alloys in Ca-Sm_2O_3-Fe System  

作　　者：邓庚凤 孙光飞 陈菊芳 祁毓俊 庞利佳 方克明 

机构地区：[1]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 [2]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [3]School of Materials and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

出　　处：《Journal of Rare Earths》2005年第5期530-533,共4页稀土学报（英文版）

基　　金：ProjectsupportedbytheNaturalScienceFoundationofChina(2032011)andthe863NanometerProgramofChina(2002AA302602)

摘　　要：Thermodynamics and kinetics for the preparation of Sm2Fe17 alloys by reduction-diffusion （R-D） method in CaSm2O3-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 Sm2Fe17 alloy increase, and the increased amount at lower temperature is higher than that at higher temperature. Moreover, results from contracting core modal show that the peritectic reaction between Sm and Fe is a ratedetermined 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.Thermodynamics and kinetics for the preparation of Sm2Fe17 alloys by reduction-diffusion （R-D） method in CaSm2O3-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 Sm2Fe17 alloy increase, and the increased amount at lower temperature is higher than that at higher temperature. Moreover, results from contracting core modal show that the peritectic reaction between Sm and Fe is a ratedetermined 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.

关 键 词：rare earth permanent magnet material Sm2Fe17 compound reduction-diffusion contracting core model tare earths 

分 类 号：TG132.2[一般工业技术—材料科学与工程]