| Preparation of DyFe_2 and TbFe_2 by Reduction-Diffusion Process |
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| 作者姓名： | Guangsi GUO Guangtai WANG and Zhitong SUI |
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| 作者单位： | Guangsi GUO，Guangtai WANG and Zhitong SUI
1)Department of Materials Science and Engineering，Shenyang Institute of Technology，Shenyang 110016，China
2)School of Materials and Metallurgy，Northeastern University，Shenyang 110004，China |
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| 摘 要： | The pure intermetallic compounds (Tb1-x;Dyx)Fe2 are super-magnetostriction materials, which were produced from DyFe2 and TbFe2 in this paper. The thermodynamic possibility and kinetic feasible conditions for DyFe2 and TbFe2 preparation by reduction-diffusion in Ca-Dy2O3-Fe and Ca-Tb4O7-Fe systems were analyzed and the products of DyFe2 and TbFe2 were confirmed by XRD. The contracting core model was applied to describe the reduction-diffusion process in which the diffusion is a rate-controlled step. The apparent activation energies of DyFe2 and TbFe2 processes are 45 and 39 kJ/mol respectively.
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Preparation of DyFe2 and TbFe2 by Reduction-Diffusion Process |
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| Guangsi GUO,Guangtai WANG and Zhitong SUI
.Preparation of DyFe_2 and TbFe_2 by Reduction-Diffusion Process[J].Journal of Materials Science & Technology,2004,20(1):68-70. |
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| Authors: | Guangsi GUO Guangtai WANG Zhitong SUI |
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| Affiliation: | Department of Materials Science and Engineering, Shenyang Institute of Technology, Shenyang 110016,China |
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| Abstract: | The pure intermetallic compounds (Tb1-xDyx)Fe2 are super-magnetostriction materials, which were produced from DyFe2and TbFe2 in this paper. The thermodynamic possibility and kinetic feasible conditions for DyFe2 and TbFe2 preparation by reduction-diffusion in Ca-Dy2O3-Fe and Ca-Tb4O7-Fe systems were analyzed and the products of DyFe2 and TbFe2 were confirmed by XRD. The contracting core model was applied to describe the reduction-diffusion process in which the diffusion is a rate-controlled step. The apparent activation energies of DyFe2 and TbFe2 processes are 45 and 39 k J/mol respectively. |
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| Keywords: | Ca-Dy2O3 -Fe Ca-Tb4O7-Fe Reduction-diffusion DyFe2 TbFe2 Contracting core model |
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