熔融純鉄の水素の溶解度

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  • The Solubility of Hydrogen in Liquid Pure Iron
  • ヨウユウジュンテツ ノ スイソ ノ ヨウカイド

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Data on the solubility of hydrogen in liquid metals are of practical interest. The solubility of hydrogen in liquid pure iron was measured with the ordinary hot-volume method. The following problems regarding the hot-volume method were examined: Selection of the melting crucible; selection of the standard gas for determination of the hot volumes of the apparatus; effects of the shapes, the magnitude of the dead spaces and the cooling methods of the melting chamber on the solubility of hydrogen.<BR>The results obtained were as follows:<BR>(1) Among alumina-, magnesia-, beryllia- and thoria-crucible, thoria crucible was the only melting crucible which could be used in the hot-volume method.<BR>(2) Helium and argon were used for the standard gas. But according to the difference in the thermal properties between the gases, different experimental solubility values were obtained.<BR>(3) Among the experimental solubility values, the most reliable value was obtained by using helium whose thermal properties are most akin to hydrogen and at the same time by using a completely water cooled reaction tube whose inner volume was reduced to an extreme.<BR>(4) The solubility of hydrogen in liquid pure iron and the standard free energy change in dissolving of 1 wt%H were expressed as a function of temperature as follows:<BR>(This article is not displayable. Please see full text pdf.)

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