**4. Conclusion**

In this chapter, the hydrogenation behavior of Zr-based quasicrystalline alloy system has been discussed. Based on this study, it may be said that the hydrogen storage capacity of partially quasicrystalline (Zr69.5Al7.5Cu12Ni11)100−xTix (x = 0, 4 and 12) alloys has been improved by the addition of Ti. The hydrogen storage capacity is enhanced from ∼1.20 wt.% (for x = 0) to ∼1.56 wt.% (for x = 12). The enhancement in storage capacity for the alloy with x = 12 is ∼23% as compared to the storage capacity of alloy with x = 0. The grain refinement of quasicrystals resulting due to Ti addition has led to the improvement in the hydrogen uptake capacity of (Zr69.5Al7.5Cu12Ni11)100−xTix alloys. The microhardness shows only minor changes after hydrogenation of quasicrystal-glass composites. The microstructural and morphological changes affect the hydrogen storage characteristics of quasicrystal-glass composites.
