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

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 ℃ ,and the three two-phase areas are FCC-A1(Cu-rich)+γ-Ni5Si2,FCC-A1(Cu-rich)+δ-Ni2Si and FCC-A1(Cu-rich)+ε-Ni3Si2,two three-phase areas are FCC-A1(Cu-rich)+γ-Ni5Si2+δ-Ni2Si and FCC-A1(Cu-rich)+δ-Ni2Si+ε-Ni3Si2.For this reason,an alloy located in the Cu-rich portion may precipitate γ-Ni5Si2,δ-Ni2Si or ε-Ni3Si2; the proportion of each phase depends on the alloy composition and aging temperature.The transmission electron microscope analysis of the Cu-3.2Ni-0.75Si alloy indicates that the precipitates are mainly δ-Ni2Si with only a few γ-Ni5Si2 phase particles,which agrees well with the thermodynamic calculations of phase equilibria.

关键词： Cu-Ni-Si alloy phase diagram calculation thermodynamics

作者: LU De-ping WANG Jun A.Atrens ZOU Xing-quan LU Lei SUN Bao-de

作者单位: Institute of Applied Physics,Jiangxi Academy of Sciences,Nanchang 330029,China State Key Laboratory of Metal Matrix Composite,Shanghai Jiao Tong University,Shanghai 200030,China Division of Materials,The University of Queensland,Brisbane,Qld,Australia 4072

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）