Hydrogenation of (Zr_(69.5)Al_(7.5)Cu_(12)Ni_(11))_(100) - _xTi_x quasicrystalline alloys and its effect on their structural and microhardness behavior

摘要

The present study deals with themicrostructural changes with respect to the addition of Ti and their correlation with hydrogen storage characteristics of (Zr_(69.5)Al_(7.5)Cu_(12)Ni_(11))_(100) - _xTi_x (x = 0, 4 and 12) quasicrystalline alloys. The grain size of quasicrystals decreaseswith addition of Ti. It has been found that the alloywith x = 0 absorbed 1.20 wt. %, whereas the alloys with x = 4 and 12 absorbed 1.38 wt. % and 1.56 wt. % of hydrogen respectively. Hydrogenation was found to exhibit a significant effect on the structure/microstructure and microhardness behavior of (Zr_(69.5)Al_(7.5)Cu_(12)Ni_(11))_(100) - _xTi_x quasicrystalline alloys. Variation in the microhardness behavior has been discussed based on a structure-property correlation.