The structure of rapidly solidified foil of the eutectic Sn – 8.8 wt. % Zn alloy

  • Vasili G. Shepelevich Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Denis A. Zernitsa Mozyr State Pedagogical University named after I. P. Shamiakin, 28 Studenckaja Street, Mozyr 247760, Belarus https://orcid.org/0000-0002-6251-4459
DOI: https://doi.org/10.33581/2520-2243-2020-1-67-72

Abstract

Microstructure of rapidly solidified eutectic alloy foil Sn – 8.8 wt. % Zn was studied. The alloy foil consists of solid solutions of zinc and tin. Dark equiaxed dispersed precipitates of zinc solid solution are uniformly interspersed in the matrix of tin solid solution. The parameters of the microstructure were determined. The average chord of a random secant at the sections of precipitates of a solid solution of zinc is 0.33 mm, and the specific interface surface is 0.81 mm–1. The precipitations of the tin solid solution have a microcrystalline structure. Specific surface of high angle boundaries less than 1 mm–1. The texture of the precipitates of solid solutions of tin and zinc in the foil was studied, and the pole densities of the diffraction lines of these phases are presented. The tin solid solution has the texture (100), and the zinc solid solution has the (0001) texture, which is explained by the predominant growth of grains, in which the crystalline planes of (100) tin and (0001) zinc are most closely packed and perpendicular to the heat flux. Eutectic alloy Sn – 8.8 wt. % Zn is in an unstable state. Annealing the foil causes the dissolution of small and coarsening of large particles of zinc solid solution, as well as the decomposition of a supersaturated tin solid solution. These processes cause an enlargement of the microstructure: an increase in the average particle size (dZn) of a solid solution of zinc and its volume fraction (VZn), a decrease in the specific surface (S ) of interphase boundaries.

Author Biographies

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

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

Denis A. Zernitsa, Mozyr State Pedagogical University named after I. P. Shamiakin, 28 Studenckaja Street, Mozyr 247760, Belarus

postgraduate student at the department of physics and mathematics, faculty of physics and engineering

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Published
2020-01-29
Keywords: rapidly solidification, Sn-Zn alloy, eutectic, microstructure, texture
How to Cite
Shepelevich, V. G., & Zernitsa, D. A. (2020). The structure of rapidly solidified foil of the eutectic Sn – 8.8 wt. % Zn alloy. Journal of the Belarusian State University. Physics, 1, 67-72. https://doi.org/10.33581/2520-2243-2020-1-67-72
Issue
No 1 (2020): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

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