2002 Volume 43 Issue 11 Pages 2728-2733
In this study, an attempt is made to form composites by mechanical alloying (MA) or pulse-electric-current-sintering (PECS) for utilization of synergy effect to acquire both high capacity and ability to absorb/desorb protium at low temperatures. The composites have well-bonded structure consisting of Mg2Ni alloy that has high hydrogenation capacity and LaNi5 alloy that is capable of protium absorption/desorption at relatively low temperatures. During the absorption process, the protium content of MA+PECS and MA specimens at 80°C is over the theoretical value corresponding to the ratio of LaNi5 phase. After absorption of the maximum protium content at 40°C by MA+PECS specimen, the desorption process was evaluated by TG/DTA analysis and the specimen starts desorbing protium at about 100°C. Consequently, the result suggests the occurrence of synergy effect during the absorption/desorption process of the obtained composites.