Characterization of hydrogen in metallic glasses by the use of Hall effect measurements

Abstract

Hall effect measurements were conducted in samples of melt spun amorphous metallic alloy ribbons with and without previous hydrogen charging. This allowed the determination of Hall coefficient, carrier mobility, carrier density and electrical conductivity. Based on these parameters, two developments were possible, the detection of amorphous hydride in a metallic glass and an alternative procedure to determine the hydrogen concentration, mobility and diffusivity in samples of this material. The values of hydrogen diffusivity determined by the proposed approach compare with those obtained by electrochemical methods. It was shown that the Hall effect measurements represent a viable and useful alternative method to characterize the hydrogen behavior in metallic glasses, being simple, precise and accurate.