A coherent phase diagram of the Aux(Ag0.24Cu0.76)1-x section of the AuCuAg ternary system

Masaharu Nakagawa, Katsuhiro Yasuda

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Abstract

The coherent phase diagram of Aux(Ag0.24Cu0.76)1-x was studied by electron microscopy. Various regions were found in the present experimental coherent phase diagram consistent with the theoretical coherent phase diagram obtained by Yamauchi using the cluster variation method: (i) a single-phase region comprising a disordered solid solution of f.c.c. α0 phase, (ii) a two-phase decomposition region containing copper-rich f.c.c. α1 and silver-rich f.c.c. α2 phases, (iii) coexisting regions of a disordered phase and an ordered phase, α2 + Cu3Au(L12), α2 + AuCuII(L10-s) and α2 + AuCuI(L10), (iv) coexisting regions of two disordered phases and an ordered phase, α1 + α2 + Cu3Au and α1 + α2 + AuCuII, and (v) coexisting regions of a disordered phase and two ordered phases, α2 + Cu3Au + AuCuII and α2 + AuCuI + AuCuII. Microstructural features of these regions were described in association with phase identifications.

Original languageEnglish
Pages (from-to)95-106
Number of pages12
JournalJournal of the less-common metals
Volume138
Issue number1
DOIs
Publication statusPublished - Mar 1 1988
Externally publishedYes

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Ternary systems
Phase diagrams
Silver
Electron microscopy
Copper
Solid solutions
Association reactions
Decomposition

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

A coherent phase diagram of the Aux(Ag0.24Cu0.76)1-x section of the AuCuAg ternary system. / Nakagawa, Masaharu; Yasuda, Katsuhiro.

In: Journal of the less-common metals, Vol. 138, No. 1, 01.03.1988, p. 95-106.

Research output: Contribution to journalArticle

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abstract = "The coherent phase diagram of Aux(Ag0.24Cu0.76)1-x was studied by electron microscopy. Various regions were found in the present experimental coherent phase diagram consistent with the theoretical coherent phase diagram obtained by Yamauchi using the cluster variation method: (i) a single-phase region comprising a disordered solid solution of f.c.c. α0 phase, (ii) a two-phase decomposition region containing copper-rich f.c.c. α1 and silver-rich f.c.c. α2 phases, (iii) coexisting regions of a disordered phase and an ordered phase, α2 + Cu3Au(L12), α2 + AuCuII(L10-s) and α2 + AuCuI(L10), (iv) coexisting regions of two disordered phases and an ordered phase, α1 + α2 + Cu3Au and α1 + α2 + AuCuII, and (v) coexisting regions of a disordered phase and two ordered phases, α2 + Cu3Au + AuCuII and α2 + AuCuI + AuCuII. Microstructural features of these regions were described in association with phase identifications.",
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