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采用透射电镜（ＴＥＭ）和Ｘ射线小角散射（ＳＡＸＳ）技术研究了经８００℃磁场热处理不同时间Ａｌｎｉｃｏ８合金组织的粗化行为研究表明，合金分解为富Ｆｅ和Ｃｏ以及富Ｎｉ和Ａｌ相，其中富Ｎｉ和Ａｌ相有序，总体而言，组织随处理时间的延长变得愈加均匀细小，这是棒状富Ｆｅ和Ｃｏ粒子在磁场热处理初期短时内迅速粗化至一定尺寸后分解成细小富Ｆｅ和Ｃｏ粒子的结果发生分解的原因是Ａｌｎｉｃｏ８合金的组织在粗化过程中产生很大的弹性共格畸变能，这种称之为稳定性分叉的现象首次在成分复杂的Ａｌｎｉｃｏ８合金中发现另外，棒状富Ｆｅ和Ｃｏ粒子的长径比随保温时间的增加而增大，磁性能测试表明，磁场热处理１０ｍｉｎ的合金具有最佳磁性能．
The coarsening behavior of Alnico8 alloy after heat treatment at 800 ℃ for different time was studied by transmission electron microscopy (TEM) and X-ray small angle scattering (SAXS). The results show that the alloy is decomposed into Fe-rich and Co-rich and Ni- Ni and Al phases are orderly. In general, the microstructure becomes more and more fine with the extension of the treatment time. This is because the rod-shaped Fe-rich and Co-particles rapidly coarsen to a certain size in the short period of magnetic field heat treatment and decompose into fine Fe The reason for the decomposition of Co and Co particles is that the Alnico 8 alloy produces a large elastic coherent aberration in the coarsening process. This phenomenon called bifurcation of stability is found for the first time in complex Alnico 8 alloys , The aspect ratio of rod-shaped Fe-rich and Co-particles increased with the increase of holding time, and the magnetic property tests showed that the alloys with magnetic field heat treatment had the best magnetic properties.