Microstructure of rapidly solidified foils of alloys of the bismuth – tin system

Authors

  • Vasiliy G. Shepelevich Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Liliya P. Shcherbachenko Brest State Technical University, 267 Maskoŭskaja Street, Brest 224017, Belarus

Keywords:

bismuth – tin system, high­speed crystallization, rapidly solidified foils, microstructure, disperse structure, volume fraction, average length of chords of phase sections, interface specific surface area

Abstract

It is established that in the rapid-quenched foils of the bismuth-tin alloys the volume fraction of the phases does not depend on the distance to their outer surface, which indicates a homogeneous distribution of phases in the volume of the foil. The formation of a dispersed structure in foils of a eutectic composition is caused by the action of the spinodal decomposition of a supersaturated liquid solution that promotes a homogeneous distribution of the nuclei of the crystalline phases, the independence of the mean chord lengths of random secants on the phase sections and the specific surface of the interface from the distance to the foil surface. The dependence of the average lengths of the chords of random secants on the phase sections and the specific surface of the interface from the distance to the surface of the foil of alloys, whose composition differs significantly from the eutectic, is due to a decrease in the supercooling of the melt as the crystallization front moves.

Author Biographies

  • Vasiliy G. Shepelevich, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

    doctor of science (physics and mathematics); professor at the department of solid-state physics, faculty of physics

  • Liliya P. Shcherbachenko, Brest State Technical University, 267 Maskoŭskaja Street, Brest 224017, Belarus

    senior lecturer at the department of physics

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Published

2019-02-03

Issue

No. 2 (2018): Journal of the Belarusian State University. Physics

Section

Condensed State Physics

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How to Cite

(1)
Shepelevich, V. G.; Shcherbachenko, L. P. Microstructure of Rapidly Solidified Foils of Alloys of the Bismuth – Tin System. Журнал Белорусского государственного университета. Физика 2019, No. 2, 46-51.