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Evaluation of Hydrogenation Properties on Ti-Nb-Cr Alloys by Single-Roll Melt Spinning  

Kim, Kyeong-Il (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University)
Hong, Tae-Whan (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University)
Publication Information
Korean Journal of Metals and Materials / v.47, no.7, 2009 , pp. 433-439 More about this Journal
Abstract
Ti and Ti based hydrogen storage alloys have been thought to be the third generation of alloys with a high hydrogen capacity, which makes it difficult to handle because of high reactivity. In order to solve the problem, the activation of a wide range of hysteresis of hydriding/dehydriding and without degradation of hydrogen capacity due to the hydriding/dehydriding cycle have to be improved in order to be aplied. Ti-Cr alloys have a high capacity about 0.8 wt.% in an ambient atmosphere. When the Ti-Cr alloys are added to Nb and Ta elements, they formed a laves phase in the alloy system. The Nb element was expected to make easy diffuse hydrogen in the Ti-Cr storage alloy, which was a catalytic element. In this study, the Ti-Nb-Cr ternary alloy was prepared by melt spinning. As-received specimens were characterized using XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy) with EDX (Energy Dispersive X-ray) and TG/DSC (Thermo Gravimetric Analysis/Differential Scanning Calorimetry). In order to examine hydrogenation behavior, the PCI (Pressure-Composition-Isotherm) was performed at 293, 323, 373 and 423 K.
Keywords
hydrogen storage alloy; melt spinning; Ti-Cr alloy; laves phase;
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