Phase equilibria in the Ni-rich portion of the Ni-Ga binary system

R. Ducher, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The phase equilibria in the composition range from 0 to 60 at% Ga of the Ni-Ga system were determined by electron probe microanalysis (EPMA) using diffusion couples, differential scanning calorimetry (DSC) and X-ray diffraction (XRD). It was found that while the phase equilibria between the α′ (L12: Ni3Ga) and α (Ni-solid solution) or β (B2: NiGa) phases are basically in agreement with the diagram evaluated by Lee and Nash, those between γ (B81: Ni13Ga7), δ (Cmmm: Ni5Ga3) and ε (C2/m: Ni13Ga9) are topologically different from that diagram. Three eutectoid reactions (γ → δ + ε, β → γ + ε, β → α′ + γ) and one peritectoid reaction (α′ + γ → δ) were confirmed and the temperatures and concentrations of those invariant reactions were determined.

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalIntermetallics
Volume15
Issue number2
DOIs
Publication statusPublished - 2007 Feb

Keywords

  • A. Intermetallics, miscellaneous
  • B. Crystallography
  • B. Phase diagrams

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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