Formation regularity of phases in nanometer powders of Al-Fe alloy prepared by gas evaporation

来源期刊：中国有色金属学报(英文版)2000年第5期

论文作者：严红革 陈振华 康智涛 袁武华 孙亦 黄培云

文章页码：653 - 655

Key words：gas evaporation; vapor condensation; nanometer powders; Al-Fe alloy

Abstract: Nanometer powders of Al-Fe alloy were prepared by gas evaporation. The formation regularity of the phases in the as-prepared powders and the morphology of the particles were examined. The experimental results show that chemical composition of the master alloy is the key factor which controls the chemical composition of the compound phases in nanometer powders at given evaporating temperature, the compound phases with high Fe mole fraction will form with increasing of Fe content in master alloy. Only Al₁₃Fe₄, FeAl₂and Al₂Fe compound phases form in nanometer powders in present experiment, changing of the pressure of Ar can only alter relative amounts of the compound phases in the powders. Nanometer particles with inhomogeneous tissue were obtained, which is very different from that of pure Al and Fe nanometer particles. When mole fraction of Fe in particles increases, the inhomogeneity is enhanced.