Abstract
The solution of hydrogen in Pd Cu fcc substitutional alloys has been examined in the region of low hydrogen contents. Relative partial molar enthalpies of absorption at infinite dilution are found to be somewhat less exothermic for the alloys than for palladium but the change with X Cu is small. Partial excess entropies of absorption decrease with X Cu but not as markedly as for the other Pd/group IB alloys. Relative electrical resistance relationships for Pd Cu alloys have been determined as a function of their hydrogen contents. Interstitial hydrogen increases the relative electrical resistance to a lesser extent with increase of X Cu, but the absolute increase of resistance is nearly invariant with X Cu.
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