Thermal and electrical transport properties of zr-based bulk metallic glassy alloys with high glass-forming ability

Rie Y. Umetsu, Rong Tu, Takashi Goto

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Thermal and electrical transport properties, such as thermal diffusivity, the electrical resistivity and thermopower of the Zr-based bulk metallic glassy (BMG) alloys of Zr 42Cu 42Ag 8Al 8 and Zr 55Al 10Cu 35-xNi x (x = 0, 5 and 10) with high glass-forming ability were investigated. Thermal diffusivity is comparatively low at about 2 × 10 -6m 2 s -1, reflecting the aperiodic crystal structure of the BMG, whereas it becomes higher and depends on the alloy compositions after their crystallization. The phonon contribution to the thermal conductivity of the BMG alloys is thought to be small, based on a comparison with the estimated value of the electronic contribution to the thermal conductivity from the WiedemannFranz law. The thermopower of the present Zr-based BMG alloys shows a small positive value around room temperature, which is a general feature of nonmagnetic amorphous alloys.

Original languageEnglish
Pages (from-to)1721-1725
Number of pages5
JournalMaterials Transactions
Volume53
Issue number10
DOIs
Publication statusPublished - 2012

Keywords

  • Bulk metallic glass
  • Electrical resistivity
  • Glass transition
  • Thermal diffusivity
  • Thermopower

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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