Influence of Alloying Elements on the Solubility of Hydrogen in Vanadium

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  • バナジウムの水素溶解度におよぼす合金元素の影響
  • バナジウム ノ スイソ ヨウカイド ニ オヨボス ゴウキン ゲンソ ノ エイキョウ

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Solubility of hydrogen in vanadium and its binary alloys containing titanium, chromium, iron and cobalt, respectively was measured in the temperature range between 600 and 1200°C under one atmosphere pressure of hydrogen gas. The influence of alloying elements on the solubility, and the correlation between hydrogen solubility and electronic structure of alloys were discussed.<BR>The following results were obtained:<BR>(1) The solubility decreased with increase in amount of each alloying element, with the exception of titanium.<BR>(2) The lattice strain induced by alloying did not affect the solubility.<BR>(3) Relative partial molar entropy and enthalpy increased linearly with increase in electron/atom ratio from 4.9 to 5.4.<BR>(4) Variation in entropy was correlated to that in the electronic specific heat coefficient of alloy.<BR>(5) Variation in enthalpy was explained by that in density of state at the Fermi surface in the alloys.

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