Eutectic Structures Competition in the Stripes Strengthening the (Zn) – Single Crystal

• Autorzy: Wołczyński W. , Kjelstrup S. , Bedeaux D. , Szajnar J. , Billia B.

Identyfikatory

DOI

10.2478/afe-2014-0093

• Języki publikacji: EN

Abstrakty

EN

Some eutectic stripes have been generated in a hexagonal (Zn) - single crystal. The stripes are situated periodically with the constant inter stripes spacing. The eutectic structure in the stripes consists of strengthening inter-metallic compound, Zn16Ti, and (Zn) – solid solution. The rod-like irregular eutectic structure (with branches) appears at low growth rates. The regular lamellar eutectic structure is observed at middle growth rates. The regular rod-like eutectic structure exists exclusively in the stripes at some elevated growth rates. A new thermodynamic criterion is recommended. It suggests that this eutectic regular structure is the winner in a morphological competition for which the minimum entropy production is lower. A competition between the regular rod-like and the regular lamellar eutectic growth is described by means of the proposed criterion. The formation of branches within irregular eutectic structure is referred to the state of marginal stability. A continuous transitions from the marginal stability to the stationary state are confirmed by the continuous transformations of the irregular eutectic structure into the regular one.

Słowa kluczowe

EN

eutectic structure selection; Zn; single crystal; branching phenomenon

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 4
• Strony: 95--102
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Wołczyński W.

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

autor

Kjelstrup S.

• Department of Chemistry, Norwegian University of Science and Technology,7491 Trondheim, Norway

autor

Bedeaux D.

• Department of Chemistry, Norwegian University of Science and Technology,7491 Trondheim, Norway

autor

Szajnar J.

• Department of Foundry Engineering, Silesian University of Technology, Towarowa 7, 44-100 Gliwice, Poland

autor

Billia B.

• Faculte des Sciences et Techniques, Universite d’Aix-Marseille, 13397 Marseille, Av. Escadrille Normandie-Niemen, France

Bibliografia

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