金属間化合物NiAlの非化学量論組成における熱伝導度と電気伝導度

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タイトル別名
  • Thermal and Electrical Conductivities of Intermetallic Compound NiAl with Non-stoichiometric Composition
  • キンゾクカン カゴウブツ NiAl ノ ヒ カガク リョウロン ソセイ ニ オ

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Thermal conductivity of B2 type intermetallic compounds, NiAl and CoAl, have been measured at room temperature on about thirty specimens of different compositions. The conductivity-composition plots are characterized by a sharp maximum at stoichiometry in both compounds. These are the first extensive observations of such phenomena in intermetallic compounds. Electrical resistivity data are also reviewed in a wide compositional range of B2 single phase field. The field dependence of the transport properities were evaluated in terms of the Wiedmann-Franz relation. A quantitative discussion for the influence of the defect structure on the properties is developed. The dominant carrier of thermal conduction in NiAl and CoAl seems to be electrons rather than phonons in the non-stoichiometric compositions.

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  • 日本金属学会誌

    日本金属学会誌 60 (8), 695-699, 1996

    公益社団法人 日本金属学会

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