A thermodynamic analysis of the Cu-Si system

Authors
Citation
Xy. Yan et Ya. Chang, A thermodynamic analysis of the Cu-Si system, J ALLOY COM, 308, 2000, pp. 221-229
Citations number
41
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
308
Year of publication
2000
Pages
221 - 229
Database
ISI
SICI code
0925-8388(20000810)308:<221:ATAOTC>2.0.ZU;2-H
Abstract
Thermodynamic values for the liquid phase and phase equilibrium data of Cu- Si available in the literature were analyzed to yield a thermodynamic descr iption of this system which is an important binary for many multicomponent technologically important alloys. In contrast to the calculated phase diagr ams using descriptions available in the literature, the calculated diagram using the present one agrees with experimental data in terms of the liquidu s, the solidus and the (Cu) solvus as well as the temperatures and composit ions of the coexisting phases for 10 invariant equilibria. The calculated e nthalpy of mixing of the liquid alloys also agrees with experimentally meas ured values. The intermediate phases epsilon-Cu15Si4, eta-Cu19Si6, gamma-Cu 56Si11 and delta-Cu33Si7 were taken to be fine compounds as were done in al l previous descriptions. This assumption was made since these phases have r ather small ranges of homogeneity and they have minimum effects on phases i n technologically important multicomponent alloys. This improved descriptio n can be used with confidence to obtain descriptions for higher order alloy s. (C) 2000 Elsevier Science S.A. All rights reserved.