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在原位合成的Ｎｉ／Ｎｉ－Ａｌ金属间化合物层板复合材料中，随着退火温度升高，层状化合物相逐渐由富Ａｌ相转变为富Ｎｉ相。在层状的化合物相生长过程中晶界扩散占主导地位。经１１５０℃Ｎｉ退火的层中，离Ｎｉ３Ａｌ层近的区域，均匀形核的析出相生长的比较粗大；在Ｎｉ层中间，细小的析出相是非均匀形核的。在连续冷却过程中，晶界析出相通过晶界扩散而长大的同时，也造成晶界两侧出现溶质的贫乏区，从而导致无析出带产生。
In in-situ synthesized Ni / Ni-Al intermetallic compound laminates, as the annealing temperature increases, the layered compound phase gradually changes from the Al-rich phase to the Ni-rich phase. The grain boundary diffusion dominates during the growth of layered compounds. In the layer annealed at 1150 ℃, the uniformly nucleated precipitates grow more coarsely in the region near the Ni3Al layer. In the middle of the Ni layer, the fine precipitates are non-uniformly nucleated. During the continuous cooling process, the grain boundary precipitates and grows through the grain boundary diffusion. At the same time, it also causes the solute depletion zone on both sides of the grain boundary, resulting in no precipitation.