Phase formation regularities in nanometer powders of Al-Cu-X ternary alloys prepared by gas evaporation process

来源期刊：中国有色金属学报(英文版)2001年第6期

论文作者：严红革 陈振华 康智涛 陈刚 黄培云

文章页码：843 - 846

Key words：nanometer powder; gas evaporation; alloy powder

Abstract: The phase formation regularities in nanometer powders of ternary alloys prepared by gas evaporation process with induction current as the heating source were investigated. Al-Cu-Mn and Al-Cu-Cr were chosen as the samples in this study. The experimental results show that the necessary conditions for forming ternary compound phases in a ternary alloy nanometer powder are that they must be able to form in a conventional bulk alloy. To obtain a ternary compound phase in nanometer powders, composition of the master alloy must be in a certain range. Changing the composition of the master alloy and evaporation temperature can control the kinds of the phases and their relative amount in the alloy nanometer powders. In present study, AlMn, Al₈Mn₅ and AlCu₂Mn phases formed in as-prepared nanometer powders of Al-Cu-Mn alloy, and the highest relative amount of AlCu₂Mn phase is about 99%. In nanometer powders of Al-Cu-Cr alloy, Cu₉Al₄, Al₂Cu₃, AlCr₂ and Al₁₃Cr₂ phases formed without any ternary compound phase.