Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 5    May 2013

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Analysis of phase in Cu-15%Cr-0.24%Zr alloy
Li-ming BI1, Ping LIU2, Xiao-hong CHEN2, Xin-kuan LIU2, Wei LI2, Feng-cang MA2

1. School of Energy and Power Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China;2. School of Materials Science and Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China

Abstract:The vacuum medium-frequency induction melting technology was employed to prepare the Cu-15%Cr-0.24%Zr alloy. The scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) were used to analyze the phase composition, morphology and structure of the alloy. The results reveal that the as-cast structure of the alloy consists of Cu matrix, Cr dendrite, eutectic Cr and Zr-rich phase. A large number of Cr-precipitated phases occur in the Cu matrix, and Cu5Zr particles can be found in the grain boundary of Cu matrix. The HRTEM images prove that there is a semi-coherent relationship between Cu5Zr and Cu matrix.

 

Key words: Cu-Cr-Zr alloy; as-cast structure; in-situ composite; precipitated phase

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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