[Kovove materialy - Metallic materials]
    Wed - June 19, 2019 - 05:46 No. of hits : 1025816 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 39 (2001), Issue 6

Results of crystallization experiment with Ag-Ge alloys in microgravity (in Czech)
VOJTECH, D., BARTA, C., BARTA, C. Jun.
vol. 39 (2001), no. 6, pp. 410 - 421

Abstract
The fundamental results of the space crystallization experiment with model eutectic Ag-Ge system are presented in this paper. Microgravity provides conditions of a suppressed transport of components in melts that are useful for the study of crystallization. The results showed an enhanced stability of undercooled melts under limited transport of components. Unusual growth morphology of primary Ge in hypereutectic alloy arises from this phenomenon. Large nucleation undercooling of primary α crystals (hypoeutectic alloy) leads to the inverse microsegregation pattern. Non-uniform distribution of both components in eutectic due to the growth undercooling was observed in hypoeutectic alloy. Quantitative estimation of maximum undercooling of eutectic was performed using the growth model.

Key words
microgravity, crystallization, microsegregation, silver, germanium, convection, solute trapping

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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