Thermal stability and crystallisation of a Zr55Cu30Al10Ni5 bulk metallic glass studied by in situ ultrasonic echography

Vincent Keryvin, Marie Laure Vaillant, Tanguy Rouxel, Marc Huger, Thierry Gloriant, Yoshihito Kawamura

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

An original in situ ultrasonic echography technique was used to study the thermal stability and crystallisation of a Zr55Cu30Al10Ni5 bulk metallic glass between RT and 630 °C. Changes in Young's modulus with temperature were reported allowing to study the supercooled-liquid state and the crystallisation process. Investigations of viscoelastic properties gave information on the correlation factor (hierarchically correlated motion theory) and three distinct crystallisation stages were observed. Their kinetics were studied using Voigt's and Reuss' approximations for a two-phase material and comparisons with the Johnson-Mehl-Avrami-Kolmogorov theory allowed us to consider a mixed surface/internal nucleation for the first stage and a surface nucleation for the two last stages.

Original languageEnglish
Pages (from-to)1289-1296
Number of pages8
JournalIntermetallics
Volume10
Issue number11-12
DOIs
Publication statusPublished - Nov 2002
Externally publishedYes

Keywords

  • B. Glasses, metallic
  • Thermal stability

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