HYDROGEN DIFFUSION IN ZR-PD AMORPHOUS-ALLOYS

Nuclear Magnetic Relaxation measurements of the dipolar relaxation rat e due to hydrogen diffusion in Zr-Pd amorphous alloys have been conduc ted and the results interpreted in terms of the random alloy model. It is found that even though the measured activation energy using Torrey 's theory changes as the range of composition and temperature are vari ed, it stays the same for all compositions at the low temperature rang e. This behaviour is shown to be related to the type and amount of spi ns participating in the diffusion process. It is also reported here, f or the first time, that the interpretation of the NMR results is stron gly related to the composition of the alloy under investigation.