探讨了还原扩散法与传统的纯金属混熔法的不同 ,阐述了还原扩散法制取 Tb Fe2 的优点 .并且在不同的条件下制得了 Tb Fe2 .还原扩散反应温度、保温时间、还原剂的加入量以及 Fe的粒度对还原扩散反应率有影响 ,在 1 32 3K,保温 2 5 .2 ks( 7h)还原扩散反应率最好 .还原剂 Ca的加入量以理论需要量的 1 .5倍最佳 ,随着 Fe粉粒度的增大还原扩散反应率降低 . The difference between the reduction diffusion method and the traditional pure metal fusion method was discussed, and the advantages of the reduction diffusion method to prepare TbFe2 were described. And Tb Fe2 was prepared under different conditions. The reduction and diffusion reaction temperature, holding time and the addition of the reducing agent The amount of Fe, and the particle size of Fe have an impact on the reduction-diffusion reaction rate, and the best reduction-diffusion reaction rate is found at 1 32 3K and 2.52 ks (7h). The amount of reducing agent Ca added is 1.5 times of the theoretical requirement Good, with the increase of Fe particle size reduced diffusion reaction rate decreased.