Thermodynamic Study of Solid Ni–Ga Alloys by E.M.F. Measurements Using the Solid Electrolyte

• Katayama Iwao

  Department of Metallurgy, Faculty of Engineering, Osaka University

• Igi Shigeo

  Graduate School, Osaka University

• Kozuka Zensaku

  Department of Metallurgy, Faculty of Engineering, Osaka University

書誌事項

タイトル別名

• Thermodynamic Study of Solid Ni–Ga Alloys by E.M.F. Measurements Using the Solid Electrolyte

抄録

E.M.F. of a galvanic cell with the solid electrolyte (ZrO₂+CaO) was measured to determine the activities of gallium in the temperature range of 800∼1000°C and the composition range of 5∼58 at% Ga for solid Ni–Ga alloys, and thermodynamic functions were derived from the results. The cells used were as follows;<BR>Pt, Re, Ga, Ga₂O₃/ZrO₂(+CaO)/Fe, Fe_xO, Pt<BR>Pt, Re, (Ni–Ga), Ga₂O₃/ZrO₂(+CaO)/Fe, Fe_xO, Pt<BR>Activities of both components showed large negative deviations from Raoult’s law; Activity change with composition in a nickel-rich α-solid solution and in the α′(Ni₃Ga)-phase were small, but very large in the β(NiGa)-phase. Relative integral molar free energies of formation showed minimum values at the stoichiometric composition NiGa. Integral enthalpies and entropies of formation showed relatively large negative values.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 15 (6), 447-453, 1974

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390001205118146432
• NII論文ID: 130003485328
• DOI: 10.2320/matertrans1960.15.447
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/15/6/15_6_447/_pdf
• 本文言語コード: en
• データソース種別:
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