Open AccessPhase diagram determination and thermodynamic modeling of the Cu-Mg-Si system
Author(s) -
Jin-Hua Zhao,
Jixue Zhou,
S. Liu,
Yong Du,
Shouqiu Tang,
Yuguo Yang
Publication year - 2016
Publication title -
journal of mining and metallurgy. section b, metallurgy/journal of mining and metallurgy. section b, metallurgy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 20
eISSN - 2217-7175
pISSN - 1450-5339
DOI - 10.2298/jmmb150515009z
Subject(s) - phase diagram , calphad , thermodynamics , laves phase , ternary numeral system , ternary operation , work (physics) , phase (matter) , materials science , powder diffraction , diffraction , metallurgy , chemistry , crystallography , intermetallic , physics , computer science , alloy , organic chemistry , optics , programming language
13 ternary Cu-Mg-Si alloys were prepared by means of the powder metallurgy method. Phase equilibria at 500 and 700 oC of the Cu-Mg-Si system were determined using X-ray diffraction analysis (XRD). The existence of 3 ternary compounds in this system was verified: CuMgSi_Sigma (Cu16Mg6Si7), Tau (Cu3Mg2Si), and Laves ((Cu0.8Si0.2)2(Mg0.88Cu0.12)). A thermodynamic modeling for the Cu-Mg-Si system was then conducted on the basis of the experimental data obtained in this work and those critically reviewed from the literature. The complex phase relationship between Laves phase and other phases has been successfully modeled in this work. Comparisons between the calculated and the measured phase diagrams show that most of the experimental data can be reproduced by the presently obtained thermodynamic parameters