A COMPARISON OF MEASUREMENTS OF DIFFUSIVITY OF HYDROGEN IN PD FOR 3 DIFFERENT DIFFUSION-ELASTIC PROCESSES

This paper represents further attempts to estimate the diffusivity of hydrogen in alpha-Pd at 50-degrees-C in the course of three different diffusion-elastic processes involving absorption, equilibration of con centrations, and desorption of hydrogen, respectively. The numerical r esults, obtained by a least-squares treatment indicate a statistically significant difference between values derived by absorption and equil ibration procedures on one hand and values obtained from desorption st udies on the other. General reasoning seems to indicate a preference f or the equilibration derived values for the hydrogen diffusion coeffic ients as the most reliable.