Microstructure of the rapidly solidified alloy Bi34Sn63Ag3

  • Olga V. Gusakova International Sakharov Environmental Institute of the Belarusian State University, 23 Daŭhabrodskaja Street, Minsk 220070, Belarus
  • Vasiliy G. Shepelevich Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Sofia V. Gusakova Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

Abstract

The results of investigation into the microstructure, phase composition, grain structure, and texture as well as microhardness of Bi34Sn63Ag3 foils obtained by ultrafast quenching from the melt at the melt cooling rate 5 · 105 K/s are presented. It is shown that ultrafast quenching from the melt leads to the formation of the nanosized phase precipitations of bismuth and tin. The results obtained during analysis of the inclusion chords average sizes and of the specific surface for the interphase boundaries are considered. As demonstrated by studies of the grain structure, ultrafast quenching from the melt causes the formation of a microcrystalline structure of the foils. It has been found that in the foils the formed pronounced texture is gradually weakening from the side adjacent to the mold to the free solidified side. The nucleation texture formation is discussed. The changes in the foil microstructure and microhardness during aging at room temperature are illustrated. The observed decrease in microhardness is attributed to the decomposition of supersaturated solid solutions and to enlargement of the alloy particles during aging. 

Author Biographies

Olga V. Gusakova, International Sakharov Environmental Institute of the Belarusian State University, 23 Daŭhabrodskaja Street, Minsk 220070, Belarus

PhD (physics and mathematics), docent; associate professor at the department of nuclear and radiation safety, faculty of environmental monitoring

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

Sofia V. Gusakova, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

PhD (physics and mathematics); leading engineer of radiation and vacuum equipment at the department of solid-state physics, faculty of physics

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Published
2017-05-30
Keywords: eutectic alloys, cooling rate, aging, microstructure, phase composition, texture
How to Cite
Gusakova, O. V., Shepelevich, V. G., & Gusakova, S. V. (2017). Microstructure of the rapidly solidified alloy Bi34Sn63Ag3. Journal of the Belarusian State University. Physics, 2, 108-113. Retrieved from https://journals.bsu.by/index.php/physics/article/view/447
Issue
No 2 (2017): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

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