FORMATION LAW OF PHASES IN ULTRAFINE POWDERS OF Al-Cu ALLOY PREPARED BY GAS EVAPORATION PROCESS

来源期刊：中国有色金属学报(英文版)1999年第2期

论文作者：Yan Hongge Chen Zhenhua Hu Xiang Huang Peiyun

文章页码：332 - 337

Key words：gas evaporation　,vapor condensation,　ultrafine powders,　alloy powder

Abstract: Ultrafine powders of Al-Cu alloy were prepared by gas evaporation process, formation law of the phases in the as-prepared powders were examined. The results showed that the phases formed in ultrafine powders are within the scope of the phases given in Al-Cu alloy phase diagram. There are onlyθ-CuAl₂,γ₂-Al₄Cu₉,β-AlCu₃ alloy phases formed in the tested powders. The kinds of the phases formed in the powders and their fractions are controlled by the pressure fraction of the components in the mixed vapor and the cooling conditions of the experimental equipment. Changing pressure of Ar gas could only change the fractions of different phases in the powders. The solid solubility of Al and Cu atoms in the lattice of phase Cu and phase Al in the powders was within the scope of that in Al-Cu alloy diagram. The structure of the phases in the as-prepared powders were in equilibrium state.