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Features of bicrystal growth during the directional crystallization of metal melts

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Abstract

The factors responsible for the formation of different configurations of boundaries between adjacent crystallites during their growth from melt by Bridgman and Czochralski methods have been considered by an of example Fe–20 wt % Ga alloy and Ni bicrystals. It is found that the configuration of intercrystallite boundary is related to the features of crystallite growth, caused by the strained state of intercrystallite and interphase (crystal–melt) boundaries, the difference in the linear thermal expansion coefficients of the crystallite boundaries and bulk, and the shape (geometry) of the bicrystal cross section. It is suggested that the strained state of boundaries and the formation of substructure in crystallites during directional crystallization from metal melt are significantly affected by their deformation under the melt weight.

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Authors and Affiliations

  1. M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620137, Russia

    V. V. Gubernatorov, T. S. Sycheva, V. M. Gundyrev & Yu. N. Akshentsev

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  1. V. V. Gubernatorov
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  2. T. S. Sycheva
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  3. V. M. Gundyrev
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  4. Yu. N. Akshentsev
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Corresponding author

Correspondence to T. S. Sycheva.

Additional information

Original Russian Text © V.V. Gubernatorov, T.S. Sycheva, V.M. Gundyrev, Yu.N. Akshentsev, 2017, published in Kristallografiya, 2017, Vol. 62, No. 2, pp. 331–337.

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Gubernatorov, V.V., Sycheva, T.S., Gundyrev, V.M. et al. Features of bicrystal growth during the directional crystallization of metal melts. Crystallogr. Rep. 62, 336–341 (2017). https://doi.org/10.1134/S1063774517020134

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  • DOI: https://doi.org/10.1134/S1063774517020134

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