Anomalous temperature dependence of sound velocity in Zr50 Cu40Al10 with different excess free volume

T. Fukami, M. Fukatani, D. Okai, Yoshihiko Yokoyama, Y. Akeno, T. Yamasaki, A. Inoue

Research output: Contribution to journalArticlepeer-review


Temperature dependence of the mechanical resonance frequency fm of ultrasonic wave in as-quenched and annealed Zr50Al10Cu40 metallic glasses was measured from room temperature to liquid nitrogen temperature. The mechanical resonance of longitudinal wave for the as-quenched sample disappeared in lower temperature below 200 K. The resonance was restored at about 240K with increasing temperature. A hysteresis was observed in temperature dependence of fm. The qualitatively similar behaviors were observed also for transverse wave. The phenomena for the annealed samples are different from ones for the as-quenched one. The excess free volume may cause anomalous temperature dependence of fm.

Original languageEnglish
Pages (from-to)177-179
Number of pages3
JournalReviews on Advanced Materials Science
Issue number2
Publication statusPublished - 2008 Jun 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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