Materials Research · 2013 · 21 citations · 18 references
Natural SciencesMaterials EngineeringMaterials ScienceCrystal StructureMaterials ChemistryMetallurgyAlloysHigh-temperature MaterialsMetalsX-ray DiffractionAmorphizationHydride FormationShape-memory AlloysThermal Desorption AnalysisTitanium AlloysTitanium MaterialsTitanium MetallurgyX-ray Diffraction Analysis
The hydrogen absorption and desorption of Ti53Zr27Ni20 icosahedral quasicrystal (ICQ) and Ti50Ni50 shape memory alloy (SMA) melt-spun ribbons was studied. Samples were exposed to hydrogen gas at 623 K and 4 MPa for 1000 minutes. The total capacity of hydrogen obtained for Ti53Zr27Ni20 and Ti50Ni50 was 3.2 and 2.4 wt. % respectively. The Thermal Desorption Spectrometry (TDS) of the hydrogenated alloys shows that both alloys start to desorb hydrogen around 750 K. X-ray diffraction (XRD) patterns, performed after hydrogenation, indicate a complete amorphization of the Ti53Zr27Ni20 i-phase alloy, while the Ti50Ni50 alloy remained crystalline after hydride formation.
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