Thermodynamic Activity of Ga in Ni3Ga

• Kushida Ayako

  Department of Materials Science and Engineering, Kyoto University

• Ikeda Teruyuki

  Department of Materials Science and Engineering, Kyoto University

• Numakura Hiroshi

  Department of Materials Science and Engineering, Kyoto University

• Koiwa Masahiro

  Department of Materials Science and Engineering, Kyoto University

書誌事項

タイトル別名

• Thermodynamic Activity of Ga in Ni<SUB><B>3</B></SUB>Ga

抄録

Thermodynamic activity of Ga in the L1₂-ordered intermetallic phase Ni₃Ga has been determined by measuring the electromotive force of a galvanic cell with zirconia solid-electrolyte, Ni–Ga, Ga_2O_3|ZrO_2 (+ Y_2O_3) | Ga, Ga_2O_3in the temperature range between 1050 and 1300 K for six compositions. The activity of Ga varies with composition most steeply at the stoichiometric composition (25 mol%Ga), the dependence being more pronounced at low temperatures. By applying a thermodynamic model based on the Bragg-Williams approximation (Ikeda et al.: Acta Mater. 46 (1998) 6605–6613), the effective pair interaction energy between Ni and Ga atoms has been determined to be 9.75±0.19 kJ/mol. The thermodynamic factor in chemical diffusion in the L1₂ phase has been derived from the composition dependence of the thermodynamic activity.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 42 (3), 514-519, 2001

  公益社団法人 日本金属学会

キーワード

• electromotive-force measurements
• solid electrolyte
• galvanic cell
• thermodynamic activity
• intermetallic compound
• interatomic interaction energy
• thermodynamic factor in diffusion

詳細情報

• CRID: 1390282679222482560
• NII論文ID: 10006547836
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.42.514
• COI: 1:CAS:528:DC%2BD3MXjtlSjtLc%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 5729627
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5729627
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/42/3/42_3_514/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
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