Heat of evolution and non-Newtonian viscous flow of Pd40Ni40P20 glassy alloy

Nobuyuki Nishiyama, Hidemi Kato, Junji Saida, Akihisa Inoue, Ho Sou Chen

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The evolution of specific heat of a Pd40Ni40P20 glassy alloy subjected to different degrees of non-Newtonian flow condition near the glass transition temperature, Tg, was investigated by a differential scanning calorimetry (DSC) method. Three exothermic relaxation spectrums were observed in temperature dependence of the specific heat. One of the relaxations in T > 490 K (= Tg - 95 K) strongly depended on the flow condition, on the other hand, the others did weakly. This relaxation has previously been reported and is due to the long-range disordering between metal and metalloid constituents. Thus, appearance of the non-Newtonian viscous flow in this glassy alloy is associated with the disordering of the glass skeleton framed with Pd-P and Ni-P coupling by the strong shear action.

Original languageEnglish
Pages (from-to)741-745
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number2 A
Publication statusPublished - 2002 Feb 1

Keywords

  • Glassy alloy
  • Grass transition
  • Non-Newtonian flow
  • Stress-induced structure change

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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