Investigations of interfacial materials design-the effect of interface microstructures in ZrCr1.8Cu0.3/Mg on MgH2 formation as a result of hydrogen interdiffusion

S. Orimo, H. Fujii, S. Horie

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Composite materials ZrCr1.8Cu0.3/Mg were prepared by heat treatments at various temperatures, as a series for the investigation of interfacial materials design. In these composite materials, Mg2Cu phases are formed along the host-Mg interfaces with a layer-like microstructure by heat treatment at 773 K, while with an eutectic microstructure at 873 K. The MgH2 formation owing to an interdiffusion of hydrogen atoms from the host compound phase is confirmed from both in-situ thermal analyses under an argon atmosphere and in-situ measurements of temperature-changeable X-ray diffraction under a vacuum. Moreover, this interdiffusion is found to be enhanced in the eutectic interface. Consequently, interphase boundaries of an Mg2Cu/Mg eutectic are deduced to act both as a diffusion path for the hydrogen atoms from the host compound into the Mg phase, and as stable nucleation sites for MgH2.

Original languageEnglish
Pages (from-to)766-772
Number of pages7
JournalJournal of Alloys and Compounds
Volume231
Issue number1-2
DOIs
Publication statusPublished - 1995 Dec 15
Externally publishedYes

Keywords

  • Composite materials
  • Diffusion path
  • Eutectic microstructure
  • Interdiffusion of hydrogen atoms
  • Interface
  • MgCu phase
  • Nucleation site
  • ZrCrCu/Mg

ASJC Scopus subject areas

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

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