Diffuse scattering and phason modes in the Zn-Sc icosahedral quasicrystal

SessionsC417 m/sec) and investigated for their hydrogen storage characteristics.The lower cooling rate obtained through low wheel speed (35 m/ sec) produces, i-phase grains whose size ranges from 300-350 nm.Whereas higher cooling rates obtained through high wheel speed (45 and 50 m/sec) promote the formation of nano-quasicrystalline grains with size ranges from 50-150 nm in Ti 45 Zr 38 Ni 17 ribbons.It has been found that the ribbons synthesized at 35 m/sec absorbed ~2.0 wt%, whereas ribbons synthesized at 50 m/sec absorbed ~2.84 wt.% of hydrogen.Thus the hydrogen storage capacity of ribbon increases with increasing quenching rate.One of the salient features of the present study is the improvement of hydrogen storage capacity obtained through higher quenching rates (~45 to 50 m/sec wheel speed) lead to the formation of lower grain size.