The intrinsic degradation of $Zr_{0.9}Ti_{0.1}Cr_{0.9}Fe_{1.1}$ by thermally induced hydrogen absorption-desorption cycling at various conditions was investigated using the P-C-Isotherm curves, the X-ray diffraction, DSC(Differential Scanning Calorimetry) and the thermal hydrogen desorption measurement.
After 7000 thermal cycles between room temperature and 270℃ at 30 atm, the reversible hydrogen absorption capacity was decreased by about 10% of the value of the beginning of the cycling. When cycling the temperature between room temperature and 320℃, the degree of degradation was increased with increasing applied hydrogen pressure.
From the result of the thermal hydrogen desorption, DSC and the X-ray diffraction, it is suggested that the intrinsic degradation of $Zr_{0.9}Ti_{0.1}Cr_{0.9}Fe_{1.1}$. is caused by the formation of stable hydride($ZrCr_2H_x$)
