Pressure effect on crystallization temperature in Zr70Pd30 metallic glass

Jianzhong Jiang, S Jeppesen, J. Saida, C. Lathe

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Abstract

The pressure effect on amorphous-to-quasicrystalline-to-intermetallic phase transformations in a Zr70Pd30 metallic glass has been investigated by in situ x-ray diffraction measurements using synchrotron radiation. It is found that the glass crystallizes in two steps: (1) amorphous-to-icosahedral quasicrystalline and (2) icosahedral quasicrystalline-to-intermetallic Zr2 + xPd alloy. The intermetallic alloy has a tetragonal structure with lattice parameters, a = 3.310(1) Å and c = 10.974(1) Å, and a space group of I4/mmm. External pressure enhances the onset temperatures for the formation of quasicrystalline phase and intermetallic compound with rates of 11±3 and 9±4 K/GPa, respectively, while the temperature interval for the stability of quasicrystals remains almost unchanged in the pressure range of 0–3 GPa. External pressure does not affect the phase-selection sequence. The enhancement of the onset temperature for the formation of quasicrystals has been further discussed with the nucleation theory. ©2004 American Institute of Physics.
Original languageEnglish
JournalJournal of Applied Physics
Volume95
Issue number9
Pages (from-to)4651-4654
ISSN0021-8979
DOIs
Publication statusPublished - 2004

Bibliographical note

Copyright (2004) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Keywords

  • ICOSAHEDRAL PHASE
  • TRANSFORMATION
  • BINARY ZR-PD
  • AU
  • OXYGEN
  • QUASI-CRYSTALS
  • NANOQUASICRYSTALLINE PHASE
  • BULK GLASS
  • NI-AL ALLOYS
  • SUPERCOOLED LIQUID REGION

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