Thermodynamic analysis of the iron-copper system I: The stable and metastable phase equilibria

1984 ◽  
Vol 15 (10) ◽  
pp. 1921-1930 ◽  
Author(s):  
Ying-Yu Chuang ◽  
Rainer Schmid ◽  
Y. Austin Chang
Keyword(s):  
Phase Equilibria ◽  
Thermodynamic Analysis ◽  
Metastable Phase ◽  
Iron Copper

scholarly journals Stable and Metastable Phase Equilibria Involving the Cu6Sn5 Intermetallic

2021 ◽  
Author(s):  
A. Leineweber ◽  
M. Löffler ◽  
S. Martin
Keyword(s):  
Phase Equilibria ◽  
Electron Backscatter Diffraction ◽  
Metastable Phase ◽  
Stable Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Ordered Phases ◽  
Backscatter Diffraction ◽  
Kinetics Of

Abstract Cu6Sn5 intermetallic occurs in the form of differently ordered phases η, η′ and η′′. In solder joints, this intermetallic can undergo changes in composition and the state of order without or while interacting with excess Cu and excess Sn in the system, potentially giving rise to detrimental changes in the mechanical properties of the solder. In order to study such processes in fundamental detail and to get more detailed information about the metastable and stable phase equilibria, model alloys consisting of Cu3Sn + Cu6Sn5 as well as Cu6Sn5 + Sn-rich melt were heat treated. Powder x-ray diffraction and scanning electron microscopy supplemented by electron backscatter diffraction were used to investigate the structural and microstructural changes. It was shown that Sn-poor η can increase its Sn content by Cu3Sn precipitation at grain boundaries or by uptake of Sn from the Sn-rich melt. From the kinetics of the former process at 513 K and the grain size of the η phase, we obtained an interdiffusion coefficient in η of (3 ± 1) × 10−16 m2 s−1. Comparison of this value with literature data implies that this value reflects pure volume (inter)diffusion, while Cu6Sn5 growth at low temperature is typically strongly influenced by grain-boundary diffusion. These investigations also confirm that η′′ forming below a composition-dependent transus temperature gradually enriches in Sn content, confirming that Sn-poor η′′ is metastable against decomposition into Cu3Sn and more Sn-rich η or (at lower temperatures) η′. Graphic Abstract

Metastable phase equilibria in the lead-tin alloy system: Part II. Thermodynamic modeling

1989 ◽  
Vol 20 (5) ◽  
pp. 795-803 ◽  
Author(s):  
H. J. Fecht ◽  
M. X. Zhang ◽  
Y. A. Chang ◽  
J. H. Perepezko
Keyword(s):  
Phase Equilibria ◽  
Thermodynamic Modeling ◽  
Metastable Phase ◽  
Alloy System ◽  
System Part

Metastable Phase Equilibria in the Aqueous Ternary Systems KCl + MgCl2+ H2O and KCl + RbCl + H2O at 298.15 K

2011 ◽  
Vol 56 (8) ◽  
pp. 3384-3391 ◽  
Author(s):  
Xudong Yu ◽  
Ying Zeng ◽  
Huixin Yao ◽  
Jianyuan Yang
Keyword(s):  
Phase Equilibria ◽  
Metastable Phase ◽  
Ternary Systems

Thermodynamic analysis of phase equilibria in the Cr–Mo–B ternary system

Calphad ◽  
2010 ◽  
Vol 34 (3) ◽  
pp. 263-270 ◽  
Author(s):  
Masayuki Tojo ◽  
Tatsuya Tokunaga ◽  
Hiroshi Ohtani ◽  
Mitsuhiro Hasebe
Keyword(s):  
Ternary System ◽  
Phase Equilibria ◽  
Thermodynamic Analysis

Evaluation and thermodynamic analysis of phase equilibria in the U-Al system

1989 ◽  
Vol 167 ◽  
pp. 160-168 ◽  
Author(s):  
M.E. Kassner ◽  
P.H. Adler ◽  
M.G. Adamson ◽  
D.E. Peterson
Keyword(s):  
Phase Equilibria ◽  
Thermodynamic Analysis

Stable and Metastable Phase Equilibria of the Lithium-Containing Salt-Water Systems

2014 ◽  
Vol 1015 ◽  
pp. 401-404
Author(s):  
Long Li ◽  
Dao Lin Gao ◽  
Jiang Ping Zeng ◽  
Ya Fei Guo ◽  
Tian Long Deng
Keyword(s):  
Phase Equilibria ◽  
Phase Diagrams ◽  
Salt Lake ◽  
Salt Water ◽  
Metastable Phase ◽  
Water Systems ◽  
Strategic Resources ◽  
The Future ◽  
Salt Lake Brine

Salt lake brine resource is one of the strategic resources in the western of China. Phase equilibria and phase diagrams are the theoretic foundation for the exploitation of salt lake brine resources. Hence, studies for the stable and metastable phase equilibria of lithium-containing salt-water systems are of the great importance for the development of salt lake brine resources. In this paper, the stable and metastable phase equilibria of lithium-containing salt-water systems were summarized, and the problems existed at present and the new trends in the future are also discussed.

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