モリブデンおよびモリブデン合金の水素溶解度

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タイトル別名
  • Solubility of Hydrogen in Molybdenum and Its Alloys
  • モリブデン オヨビ モリブデン ゴウキン ノ スイソ ヨウカイド

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説明

Solubility of hydrogen in molybdenum and its binary solid solution alloys containing titanium, zirconium, vanadium and niobium, respectively was measured in the temperature range between 600 and 1200°C under one atmosphere pressure of hydrogen gas.<BR>The following results were obtained.<BR>(1) Relative partial molar entropy Δ\barSXS and enthalpy Δ\barH for hydrogen solubility in molybdenum were obtained as Δ\barSXS=−15.8 cal/g-atom·deg and Δ\barH=9.51 kcal/g-atom respectively.<BR>(2) The solubility increased with increase in the amount of each alloying element.<BR>(3) The entropy of the alloys first decreased with increase in the alloying elements and became almost constant with a value of approximately −17.5 cal/g-atom·deg. Vibrational frequency of hydrogen atom calculated from Δ\barSXS values was 3.0×1013 sec−1 for molybdenum and 4.0×1013 sec−1 for the alloys.<BR>(4) In Mo-Ti alloys, and Mo-V and Mo-Nb alloys containing more than about 10 at% of each alloying element, the enthalpy decreased monotonically with increase in electron/atom ratio.<BR>(5) Values of Δ\barSXS and ΔH in Mo-V and Mo-Nb alloys were minimum at the composition of about 3 at% of these alloying elements. Variation of these values seemed to be related to the electronic specific heat coefficient of alloys.<BR>(6) In Mo-Zr alloys, the lattice strain induced by alloying also affected the solubility.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 38 (11), 1019-1025, 1974

    公益社団法人 日本金属学会

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