Description of the Cu-As-Se ternary system

The phase diagram of the Cu-As-Se ternary system was studied by differential thermal analysis, X-ray diffraction and metallography analysis. Two ternary phases are observed: the Cu3AsSe4 compound, which melts congruently, and the CuAsSe2 compound, which undergoes a peritectic decomposition. The tern...

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Bibliographic Details
Published in:Journal of alloys and compounds 1995-07, Vol.224 (2), p.316-329
Main Authors: Cohen, Kamira, Rivet, Jacques, Dugué, Jérôme
Format: Article
Language:English
Subjects:
Binary systems
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Glassy domain
Liquid-liquid miscibility gap
Materials science
Phase diagrams
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Phase diagrams of other materials
Physics
Ternary systems
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Summary:The phase diagram of the Cu-As-Se ternary system was studied by differential thermal analysis, X-ray diffraction and metallography analysis. Two ternary phases are observed: the Cu3AsSe4 compound, which melts congruently, and the CuAsSe2 compound, which undergoes a peritectic decomposition. The ternary system is subdivided into 12 secondary triangles. The 12 ternary invariants are localized: six eutectics, one of which is degenerated at the selenium apex, and six peritectics. Two ternary liquid-liquid miscibility gaps originating from the Cu-Se binary system are identified. One of these is crossed by a eutectic valley giving a first-class ternary monotectic equilibrium. A large vitreous region, which comes from the As-Se binary glass zone, is identified; it overlaps the liquid-liquid miscibility area, giving phase-separated glasses.
ISSN:0925-8388
1873-4669
DOI:10.1016/0925-8388(95)01534-5