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分析了 Ｃａ－Ｄｙ_２Ｏ_３－Ｆｅ体系高温还原－扩散制备 ＤｙＦｅ_２热力学可能性，应用收缩核模型确定扩散是该体系反应的控制步骤，并进行了ＸＲＤ，ＥＤＸ与ＳＥＭ分析，得知在高温下可用 Ｃａ还原 ＤｙＺＯｓ生成 Ｄｙ； Ｄｙ向 Ｆｅ中扩散生成 ＤｙＦｅ２，同时求得 ＤｙＦｅ_２的表观活化能为２１０ｋＪ／ｍｏｌ。
The thermodynamics of DyFe_2 prepared by high temperature reduction-diffusion in Ca-Dy 2 O 3 -Fe system was analyzed. The shrinkage nucleus model was used to determine the diffusion reaction of DyFe_2. The XRD, EDX and SEM analyzes showed that diffusion was available Ca reduction DyZOs generate Dy; Dy diffuses into Fe to form DyFe2, and the apparent activation energy of DyFe_2 is obtained as 210kJ / mol.