발간논문

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Vol.32, No.9, 1118 ~ 1126, 1994
Title
A Thermodynamic Explanation for the Abnormally High Terminal Solubility of Hydrogen in Nb - Ta Alloys
임상호Sang Ho Lim, 강일구Il Koo Kang
Abstract
The abnormally high terminal solubility of hydrogen (TSH) in Nb-Ta alloys at 250 K was previously explained by Oates and Flanagan using the concept of para- (or pseudo-) equilibrium. In this paper, in order to provide a more accurate explanation for the low temperature TSH and furthermore the phase diagram of Nb-Ta-H system, we recalculate the TSH of Nb-Ta alloys by applying the same method used previously but considering more experimental thermodynamic results available. The present calculation is found to give a better agreement between the experimental and calculated TSH results. Also the phase diagram obtained from the present calculation is well in accord with the detailed structural information, whilst that from the previous calculation is not. The present work emphasizes the need to use accurate thermodynamic data in model calculations.
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