Calculation of Cu-rich part of Cu-Ni-Si phase diagram

被引：0

作者：

Lu De-ping ^{[1
]}

Wang Jun ^{[2
]}

Atrens, A. ^{[3
]}

Zou Xing-quan ^{[1
]}

Lu Lei ^{[1
]}

Sun Bao-de ^{[2
]}

机构：

[1] Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Metal Matrix Composite, Shanghai 200030, Peoples R China

[3] Univ Queensland, Div Mat, Brisbane, Qld 4072, Australia

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2007年 / 17卷

关键词：

Cu-Ni-Si alloy; phase diagram calculation; thermodynamics; PRECIPITATION;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The thermodynamic calculation of phase equilibria in the Cu-Ni-Si alloy system was carried out using the CALPHAD method. The calculations show that there are three two-phase areas and two three-phase areas in the Cu-rich parts of the isothermal section of the phase diagram at 300-600 degrees C, and the three two-phase areas are FCC-Al(Cu-rich)+gamma-Ni5Si2, FCC-Al(Cu-rich)+delta-Ni2Si and FCC-Al(Cu-rich)+epsilon-Ni3Si2, two three-phase areas are FCC-Al(Cu-rich)+gamma-Ni5Si2+delta-Ni2Si and FCC-Al(Cu-rich)+delta-Ni2Si+epsilon-Ni3Si2. For this reason, an alloy located in the Cu-rich portion may precipitate gamma-Ni5Si2, delta-Ni2Si or epsilon-Ni3Si2; the proportion of each phase depends on the alloy composition and aging temperature. The transmission electron microscope analysis of the Cu-12M-0.75Si alloy indicates that the precipitates are mainly delta-Ni2Si with only a few gamma-Ni5Si2 phase particles, which agrees well with the thermodynamic calculations of phase equilibria.

引用

页码：S12 / S15

页数：4

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