Nanomechanical characterization of relaxation processes in As-S chalcogenide glasses

Michael Trunov, Peter M. Nagy, Sergey Dub, Erika Kalman

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nanoscale mechanical properties of As-S binary chalcogenide glasses for bulk and thin-film samples have been studied, using the nanoindentation technique for a step loading procedure. All components of glass deformation (plastic, elastic, and visco-elastic, or retarded) have been evaluated during the nanoindentation process. An essential redistribution of these components was observed during unloading depending on the composition of the glasses. The same nanoindentation procedure was applied to bulk, as-deposited and annealed thin-film samples of the glasses. Plots of deformation components vs. As concentration (or average covalent coordination number 〈r〉) show a minimum around the As25S75-As30S70 composition (〈r〉 ≈ 2.30), which corresponds to the rigidity percolation composition, i. e., the transition from the floppy phase to the intermediate one.

Original languageEnglish
Pages (from-to)365-369
Number of pages5
JournalInternational Journal of Materials Research
Volume98
Issue number5
DOIs
Publication statusPublished - May 2007

Keywords

  • Chalcogenide glass
  • Intermediate phase
  • Nanoindentation
  • Relaxation
  • Rigidity percolation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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