The high number of tetrahedrally coordinated sites for interstitial hydrogen and the favorable hydrogen-metal chemistry make quasicrystalline Zr-Cu-Ni-Al alloys a candidate for hydrogen storage applications,The icosahedral phase in Zr_69.5Cu_12Ni_11Al_7.5 has been shown to absorb electrochemically hydrogen up to H/M= 1.6. Only partially desorption of hydrogen was observed by TDA at abouft 500 deg C.Since hydrogen desorption seems to be hindered by a surface barrier,the hydrogen remains in the quasicrystal thus influencing their thermal stability.Such effects of hydrogen were studies by DSC and microstructural investigations.
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