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用扩散偶法和电子探针法测出了Ｆｅ－Ｍｎ－Ａｌ系１３００℃α／γ和α／Ｌ两相的平衡共轭成分，并借助于Ｆｅ－Ａｌ、Ａｌ－Ｍｎ、Ｆｅ－Ｍｎ二元相图，绘出了该三元系１３００℃部分等温截面图．
The equilibrium conjugated components of α / γ and α / L phases at 1300 ℃ in Fe-Mn-Al system were measured by the method of diffusion couple and electron probe. The equilibrium structures were characterized by means of Fe-Al, Al-Mn, Fe- Yuan phase diagram, draw the ternary system 1300 ℃ partial isothermal section.