DILATATION INVESTIGATION OF POROUS INTERMETALLIC SAMPLES DURING REVERSIBLE HYDROGENATION

Results of the dilatation investigation of the porous samples LaNi4Al, Laves phase Zr0.194Co0.07 Fe0.067Cr0.076V0.181Ti0.145Ni0.276 and TiNi during cyclic hydrogenation are presented. The deformation is shown t o have partially or completely reversible character. The reversible de formation is determined by the physical and chemical nature of the mat erial and does not depend on the geometrical and technological paramet ers of the system. The irreversible deformation is caused by the parti cle pulverization and its value is the measure of the material destruc tion during hydrogenation-dehydrogenation. The phenomenon of the defor mation hysteresis connected with the hysteresis of the direct reverse phase transformation has been discovered. Copyright (C) 1996 Published by Elsevier Science Ltd on behalf of International Association for Hy drogen Energy.