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利用铁粉铝粉间的放热化学反应合成了Ｆｅ３Ａｌ合金，分析比较了热爆、热爆加压和自蔓延三种工艺条件下产物形成过程及组织结构特点，研究表明：合成开始时首先分别在粗大铁粉和细小铁粉处形成含铝富铁。相和ｎ（Ｆｅ３Ａｌ５）型化合物两种过渡相，热爆合成温度较高，两种过渡相间可充分反应生成成份均匀的ａ相，并经较快冷却后亚稳定存在于室温；热爆加压合成时，加压系统的吸热不仅使合成反应移到温度较低的Ｂ２相区中进行，而且冷却加快使反应后的扩散过程无法充分进行，产物由成份不均匀的Ｂ２相和反应后残留的ａ相组成。
The Fe3Al alloy was synthesized by the exothermic chemical reaction between iron powder and aluminum powder. The formation process and microstructure of the product were analyzed and compared under the three technological conditions of thermal explosion, thermal explosion pressure and self-propagation. The results show that when the synthesis starts, Aluminum and iron are formed at the coarse iron and the fine iron. Phase and n (Fe3Al5) type compounds, the thermal explosion synthesis temperature is higher, the two transitional phases can be fully reacted to form a uniform phase composition, and after a relatively fast cooling metastable at room temperature; thermal explosion pressure Synthesis, the endothermic heating system not only allows the synthesis reaction to move to the lower temperature B2 phase region, and accelerated cooling so that the reaction after the diffusion process can not be fully carried out, the product from the uneven composition of the B2 phase and the residual reaction A phase composition.