Back-Diffusion In Crystal Growth. Eutectics

• Autorzy: Wołczyński W.

Identyfikatory

DOI

10.1515/amm-2015-0392

Warianty tytułu

PL

Dyfuzja wsteczna we wzroście kryształu. Eutektyki

• Języki publikacji: EN

Abstrakty

EN

Solute segregation/redistribution model for some eutectic alloys is presented. The differential equation for the solute micro-segregation during solidification accompanied by the back-diffusion is formulated. The solution to this equation results in the definitions of: solidification path, solid/liquid (s/l) interface path and redistribution path. An equation for the estimation of the amount of equilibrium and non-equilibrium precipitates is also delivered. It is proved that the current model is universal one. Thus, the model reduces perfectly, mathematically to both description of diffusion-less solidification and model of equilibrium solidification.

PL

Przedstawiono model segregacji/redystrybucji składnika dla stopów eutektycznych. Sformułowano równanie różniczkowe dla mikrosegregacji składnika podczas krystalizacji, której towarzyszy dyfuzja wsteczna. Rozwiązanie tego równania pozwoliło na zdefiniowanie ścieżek: krystalizacji, frontów krystalizacji i redystrybucji. Sformułowano równanie dla oceny ilości wydzieleń równowagowych i nierównowagowych. Pokazano, że model jest uniwersalny. Dlatego, redukuje się perfekcyjnie, matematycznie do opisu krystalizacji bez dyfuzji a także do modelu krystalizacji równowagowej.

Słowa kluczowe

EN

microsegregation; redistribution; precipitates

PL

mikrosegregacja; redystrybucja; osady

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 3
• Strony: 2403--2407
• Opis fizyczny: Bibliogr. 30 poz., rys., wzory

Twórcy

autor

Wołczyński W.

• Institute of Metallurgy and Materials, Polish Academy of Sciences, 25 Reymonta Str., 30-059 Kraków, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.