  The hydrogen sorption performance of V55Ti21Cr17Fe7 and V55Ti21Mn17Fe7 alloys
and their ribbons were evaluated by pressure composition temperature tests.
Their hydrogen absorption kinetic properties were studied through hydrogen
absorption curves. The crystallographic structures and microstructure of these
alloys and ribbons before hydrogen absorption and after hydrogen desorption PCT
tests were identified by Xray diffraction and Scanning electron microscopy
analysis, respectively. Hydrogen storage characteristics of such materials were
investigated by volumetric method using Sieverts type apparatus and gravimetric
method with suspension balance.
