Abstract
The solubility of hydrogen in liquid pure Fe, Co, Ni, and Cu is calculated in terms of a hard sphere version (the scaled particle theory) of the Percus-Yevick equation for the liquid state. The hard sphere radius of a metal atom is estimated from the packing density for the liquid structure factor which has been reported to fit satisfactory with the observed diffraction data for the liquid metals. For a hydrogen atom dissolved in the metals, the hard sphere radius is derived as a function of the screening distance. Good agreement is obtained between theoretically calculated Sieverts’ constants for the metals and experimental observations.
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