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Elastic moduli and phase transitions in Sn0.8In0.2(γ-Sn)

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
53
Issue
6
Identifiers
DOI: 10.1016/0022-3697(92)90196-k
Keywords
  • Elastic Moduli
  • Ultrasonic Measurements
  • Sn0.8In0.2
  • Phase Transitions
Disciplines
  • Physics

Abstract

Abstract The complete set of elastic moduli for the simple hexagonal alloy Sn 0.8In 0.2(γ-Sn) is determined above liquid nitrogen temperature, using a non-contact electromagnetic technique for the excitation and detection of ultrasound. The values obtained are compared with the data for the body-centered tetragonal structure of β-Sn on the basis of the orientational relationship between these two modifications of tin. The temperature dependencies of the longitudinal and transverse sound velocities show pronounced softening below liquid nitrogen temperatures, which can be attributed to successive phase transitions first to the unstable γ'-Sn structure and then to the β-Sn structure.

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