EVOLUTION OF STRUCTURE AND HYDROGEN SORPTION PROPERTIES DURING THE PROGRESSIVE CYCLING OF A LmNi5-LaNi5 MIXTURE

P. GIRARDIN; M.R. ESQUIVEL; G. MEYER

CIUDAD DE SAN NICOLAS-BUENOS AIRES-ARGENTINA

Congreso; JORNADAS SAM/CONAMET 2007; 2007

ASOCIACION ARGENTINA DE MATERIALES

The evolution of structure and hydrogen sorption properties of both LaNi5 and a LaNi5-LmNi5 mixture are analyzed in this work. Kinetics and equilibrium hydrogen sorption properties from 25 to 90 ºC were obtained using volumetric methods. The effect of cycling on particles morphology and chemical composition were analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. The results obtained are discussed along with the possibilities of using AB5-AB5´ mixtures for tuning of the sorption properties of alloys used in compression devices.