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Pseudobinary eutectics in Cu–Ag–Ge alloy droplets under containerless condition

Ruan, Y. ; Wang, X.J. ; Lu, X.Y.

Journal of alloys and compounds, 2013-06, Vol.563, p.85-90 [Periódico revisado por pares]

Kidlington: Elsevier B.V

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Título:
Pseudobinary eutectics in Cu–Ag–Ge alloy droplets under containerless condition
Autor: Ruan, Y. ; Wang, X.J. ; Lu, X.Y.
Assuntos: Condensed matter: structure, mechanical and thermal properties ; COPPER ALLOYS (40 TO 99.3 CU) ; Copper base alloys ; COPPER SILVER ALLOYS ; Dendritic structure ; DENDRITIC STRUCTURES ; Droplets ; Eutectics ; Exact sciences and technology ; Mechanical and acoustical properties ; Mechanical and acoustical properties of condensed matter ; Metals and alloys ; Microstructure ; MICROSTRUCTURES ; Morphology ; Nanostructure ; PHASE DIAGRAMS ; Phase transitions ; Physical properties of thin films, nonelectronic ; Physics ; Rapid solidification ; Silver ; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) ; Ternary alloys
É parte de: Journal of alloys and compounds, 2013-06, Vol.563, p.85-90
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: ► Two pseudobinary eutectics form in Cu–Ag–Ge alloy. ► It is influenced by thermodynamic and kinetic factors of the alloy in the drop tube. ► As droplet size reduces, anomalous→lamellar→anomalous transition happens in (Ag+ζ). ► (Ag+ε2) is a product of both peri-eutectic and pseudobinary eutectic transitions. Pseudobinary eutectic generated by pseudobinary eutectic transition or peri-eutectic transition is a crucial structure in ternary alloy systems. Its formation mechanism strongly influences mechanical properties of these metallic materials. However, it was customarily neglected. In this paper, two pseudobinary eutectics, i.e. (Ag+ζ) and (Ag+ε2), were investigated during the rapid solidification of Cu–Ag–Ge ternary alloy in a 3m-drop tube. The sharp temperature variations and dramatic kinetic activities of the falling alloy droplets before solidification cause special microstructural characteristics. (Ag) dendrite is the heterogeneous nucleus for anomalous (Ag+ζ) pseudobinary eutectic in large droplets. Lamellar (Ag+ζ) pseudobinary eutectic grain forms independently on condition that primary (Ag) dendrite cannot form and its eutectic morphology becomes anomalous with the decrease of droplet size. Nanoscaled (Ag+ε2) pseudobinary eutectic generating at the last stage of solidification is the product of both peri-eutectic and pseudobinary eutectic transitions. It distributes in the gaps of (Ag+ζ) pseudobinary eutectic grains and its morphology remains lamellar regardless of droplet size.
Editor: Kidlington: Elsevier B.V
Idioma: Inglês

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Pseudobinary eutectics in Cu–Ag–Ge alloy droplets under containerless condition

Ruan, Y. ; Wang, X.J. ; Lu, X.Y.

Kidlington: Elsevier B.V

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