Change in thermal expansion coefficient of bulk metallic glasses T g measured by real-time diffraction using high-energy synchrotron light

A. R. Yavari, S. Pang, D. Louzguine, A. Inoue, N. Lupu, N. Nikolov, G. Heunen

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

The "isentropic" glass transition Tg in metallic glasses can be studied by calorimetric techniques which show an endothermic event corresponding to a specific heat ΔCp difference between the glassy and supercooled liquid states. In this work we show that isostructural thermal expansion coefficient αT is easily obtained by diffraction data hence an "isochoric Tg" should be detectable by diffraction. A clear Δαth is reported for an Fe-based metal-metalloid bulk glass in the same glass transition temperature range of ΔCp but not in a Cu -based metal-metal type bulk glasses where Δαth likely occurs well above the calorimetric Tg.

Original languageEnglish
Pages (from-to)105-110
Number of pages6
JournalJournal of Metastable and Nanocrystalline Materials
Volume15-16
DOIs
Publication statusPublished - 2003
EventProceedings of the 9th International Symposium on Metastable Mechanically Alloyed and Nanocrystalline Materials (ISMANAM-2002) - Seoul, Korea, Republic of
Duration: 2002 Sep 82002 Sep 12

Keywords

  • Bulk Metallic Glasses
  • Glass Transition
  • Synchrotron Radiation
  • Thermal Expansion

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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