Sn-Zn-Bi-Ga system alloys for lead-free soldering, obtained by rapid solidification

  • Olga V. Gusakova International Sakharov Environmental Institute, Belarusian State University
  • Vasiliy G. Shepelevich Belarusian State University

Abstract

The paper presents the results of studying the structural-phase state of the foil of Sn-Zn-Bi alloys of eutectic and near-eutectic compositions doped with Ga, obtained by rapid quenching from the melt at a melt cooling rate of 105 K/s. Using the techniques of X-ray diffraction analysis, scanning electron microscopy and X-ray spectral analysis, it has been established that the foil solidifies with the formation of a tin-based solid solution supersaturated with zinc, bismuth and gallium; its microstructure is formed as a result of the decomposition of the solid solution at room temperature and the formation of zinc inclusions. The homogeneity of the composition and distribution of bismuth and gallium and zinc inclusions over the volume of the foil was established. It was shown by the method of diffraction of back reflected electrons that the foils have a microcrystalline structure. The processes of coarsening of the microstructure during aging at room temperature have been studied.The features of the influence of the gallium concentration on the microstructure, the grain structure and stability of rapidly solidified foils are revealed.

Author Biographies

Olga V. Gusakova, International Sakharov Environmental Institute, Belarusian State University

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

Vasiliy G. Shepelevich, Belarusian State University

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

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Published
2021-01-15
Keywords: tin, zinc, gallium, bismuth, rapid solidification, microstructure, grain structure
How to Cite
Gusakova, O. V., & Shepelevich, V. G. (2021). Sn-Zn-Bi-Ga system alloys for lead-free soldering, obtained by rapid solidification. Journal of the Belarusian State University. Ecology, 4, 79-85. Retrieved from https://journals.bsu.by/index.php/ecology/article/view/3647
Issue
No 4 (2020): Journal of the Belarusian State University. Ecology
Section
Industrial and Agricultural Ecology