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
收藏
页码：S12 / S15
页数：4
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