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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 6    December 2001

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Phase formation regularities in
nanometer powders of
Al-Cu-X ternary alloys prepared
by gas evaporation process
YAN Hong-ge(严红革)1, CHEN Zhen-hua(陈振华)1, KANG Zhi-tao(康智涛)2,
CHEN Gang(陈  刚)1, HUNAG Pei-yun(黄培云)2

1. School of Materials Science and Engineering,
Hunan University, Changsha 410082, P.R.China;
2. Department of Materials Science and Engineering,
Central South University, Changsha 410083,  P.R.China

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.

 

Key words:  nanometer powder; gas evaporation; alloy powder

ISSN 1672-7029
CN 43-1423/U

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