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Evaluation of Hydrogenation Properties on Ti-Cr-Nb Alloys Manufactured by Arc Melting  

Lee, Young-Geun (Department of Mater. Sci. & Eng., Chungju National Univ.)
Hong, Tae-Whan (Department of Mater. Sci. & Eng., Chungju National Univ.)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.19, no.6, 2008 , pp. 482-489 More about this Journal
Abstract
Ti-Cr alloys consist of BCC solid solution, C36, C14 and C15 Laves phase at high temperature. Among others, the BCC solid solution phase was reported to have a high hydrogen storage capacity. However, activation, wide range of hysteresis at hydrogenation/dehydrogenation, and degradation of hydrogen capacity due to hydriding/dehydriding cycles must be improved for its application. In this study, to improve such problems, we added a Nb. For attaining target materials, Ti-10Cr-xNb(x=1, 3, 5wt.%) specimens were prepared by arc melting. The arc melting process was carried out under argon atmosphere. 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 423K.
Keywords
Hydrogen storage alloy; Arc melting; Ti-Cr alloy; Laves phase;
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Times Cited By KSCI : 1  (Citation Analysis)
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