The structural relaxation behavior around glass transition temperature in Pd-Cu-Ni-P metallic glasses

Osami Haruyama, Makoto Tando, Hisamichi M. Kimura, Nobuyuki Nishiyama, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The structural relaxation behavior in the Pd40Cu30Ni10P20 and the Pd43Cu27Ni10P20 metallic glasses was examined by the differential scanning calorimetry and the electrical resistivity experiment. A sharp endothermic peak in the DSC thermogram appeared just before the supercooled liquid region for the sample annealed at 540 K during a given time ranged from 864 to 2940 ks. Although the peak area, ΔHg, increased with annealing time, it did not saturate within the experiment. The room temperature Mossbauer experiment was performed to examine the change in the amorphous structure of the Pd40Cu30Ni957Fe1 P20 glass accompanied with the structural relaxation at 540 K. A Mossbauer spectrum showed an asymmetrical doublet peculiar to the paramagnetic metallic glass. The average isomer shift and quadrupole splitting decreased with time up to 1440 ks and thereafter increased. The behavior of these parameters was interpreted within the framework of the free volume theory.

Original languageEnglish
Pages (from-to)958-963
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume49
Issue number11
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • DSC measurement
  • Electrical resistivity
  • Mössbauer spectroscopy
  • Pd-Cu-Ni-P metallic glass
  • Structural relaxation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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