High temperature hydrogen diffusion in Zr0.33Ni0.67Hx amorphous alloys

J. Tóth, K. Tompa, A. Lovas, P. Bánki

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3 Citations (Scopus)

Abstract

The proton content in Zr0.33Ni0.67Hx amorphous alloy was monitored by changes in electrical resistivity and with the extraplated spin echo amplitude measured by the Carr-Purcell-Meiboom-Gill (CPMG) nuclear magnetic resonance pulse sequence in the temperature interval 300 to 450 K. Both methods show that the hydrogen desorption processes can be approximately divided into two ranges. The first is a fast process which is at present not interpretable. In the second stage, the process is thermally activated, and the activation energy calcualted from the resistivity changes is equal to 0.32 ± 0.04 eV. The CPMG spin echo measurements also give the spin-spin relaxation time of diffusing protons and the activation energy of this process, 0.34 ± 0.02 eV, is exactly the same as extracted from the resistivity measurements.

Original languageEnglish
Pages (from-to)334-336
Number of pages3
JournalJournal of Alloys and Compounds
Volume231
Issue number1-2
DOIs
Publication statusPublished - Dec 15 1995

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Keywords

  • Activation energy
  • Amorphous alloy
  • Hydrogen diffusion
  • Nuclear magnetic resonance
  • Resistivity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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