Electrical resistivity and Mössbauer studies for the structural relaxation process in Pd-Cu-Ni-P glasses

Osami Haruyama, Hisamichi M. Kimura, Nobuyuki Nishiyama, Akihisa Inoue, Juichiro Arai

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The structural relaxation process in several Pd-Cu-Ni-P glasses was investigated by the electrical resistivity and the Mössbauer experiments. The change in the resistivity, ρ(300), and the corresponding slope, α(300) = (dρ/dT)300, at room temperature was measured after a given heat treatment. The change in ρ(300) with isochronal annealing below the glass transition temperature (≈ 572 K), starting from room temperature, demonstrated that the ρ(300) increased with temperature and decreased beyond 550 K. The isothermal annealing at 570 K exhibited that the ρ(300) showed an increase, about 1%, during an initial annealing stage for 3.0 × 102 s and remained almost constant up to 6.0 × 103 s, and hereafter monotonously decreased. The change in α(300) showed an opposite sign to that in ρ(300). The reversible change in ρ(300) due to isochronal annealing was observed in the heat treatment repeated between 350 and 550 K. The Mössbauer spectroscopy experiments were performed at room temperature to investigate the local structure change due to structural relaxation. The isomer shift and the quadrupole splitting for an annealed sample decreased in comparison with that of an as-quenched sample. Based on these results, the structural relaxation process and the structure change were discussed within the framework of the free volume model.

本文言語English
ページ(範囲)1931-1936
ページ数6
ジャーナルMaterials Transactions
43
8
DOI
出版ステータスPublished - 2002 8

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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