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

R. Ducher; R. Kainuma; K. Ishida

doi:10.1016/j.intermet.2006.04.004

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

R. Ducher, R. Kainuma, K. Ishida

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

24 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 language	English
Pages (from-to)	148-153
Number of pages	6
Journal	Intermetallics
Volume	15
Issue number	2
DOIs	https://doi.org/10.1016/j.intermet.2006.04.004
Publication status	Published - 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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10.1016/j.intermet.2006.04.004

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title = "Phase equilibria in the Ni-rich portion of the Ni-Ga binary system",

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.",

keywords = "A. Intermetallics, miscellaneous, B. Crystallography, B. Phase diagrams",

author = "R. Ducher and R. Kainuma and K. Ishida",

note = "Funding Information: The authors are grateful to Prof. K. Oikawa, Tohoku University, for providing them with some alloys specimens. The support from CREST, Japan Science and Technology Agency is acknowledged. Funding Information: One of the authors (R.D.) acknowledges the support from a Lavoisier grant-in-aid from the French Ministry of Foreign Affairs.",

year = "2007",

month = feb,

doi = "10.1016/j.intermet.2006.04.004",

language = "English",

volume = "15",

pages = "148--153",

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T1 - Phase equilibria in the Ni-rich portion of the Ni-Ga binary system

AU - Ducher, R.

AU - Kainuma, R.

AU - Ishida, K.

N1 - Funding Information: The authors are grateful to Prof. K. Oikawa, Tohoku University, for providing them with some alloys specimens. The support from CREST, Japan Science and Technology Agency is acknowledged. Funding Information: One of the authors (R.D.) acknowledges the support from a Lavoisier grant-in-aid from the French Ministry of Foreign Affairs.

PY - 2007/2

Y1 - 2007/2

N2 - 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.

AB - 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.

KW - A. Intermetallics, miscellaneous

KW - B. Crystallography

KW - B. Phase diagrams

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DO - 10.1016/j.intermet.2006.04.004

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EP - 153

JO - Intermetallics

JF - Intermetallics

IS - 2

ER -

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

Abstract

Keywords

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