HYDROGEN INTAKE CAPACITY OF ZRVFE ALLOY BULK GETTERS

The technique of elastic recoil detection analysis was used to study h ydrogen absorption by a non-evaporable getter (NEG) material st 707, a n alloy of Zr, V and Fe. The depth distribution and intake of hydrogen in the samples activated at different heating temperatures showed tha t the hydrogen intake was optimum at about 300 degrees C and tended to fail at higher temperatures from desorption. The maximum hydrogen sto rage capacity. of the material was studied by loading hydrogen in the sample by electrocharging technique. It was shown that it was possible to obtain hydrogen concentrations up to 1.0 x 10(22) at cm(-3), i.e. about 26 at%. (C) 1998 Elsevier Science Ltd. All rights reserved.