Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1601948 | Intermetallics | 2007 | 6 Pages |
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 ɛ (C2/m: Ni13Ga9) are topologically different from that diagram. Three eutectoid reactions (γ → δ + ɛ, β → γ + ɛ, β → α′ + γ) and one peritectoid reaction (α′ + γ → δ) were confirmed and the temperatures and concentrations of those invariant reactions were determined.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
R. Ducher, R. Kainuma, K. Ishida,