| Abstract |
| Ti-Cr alloys consists of BCC solid solution, C36, C14, C15 Laves phase at high temperature. Among them, BCC solid solution phase was reported that 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 have to be improved for its application. In this study, for improving such a problems, we added on Nb. For getting a target materials, Ti-1Nb-10Cr, Ti-3Nb-10Cr and Ti-5Nb-10Cr specimens were prepared by planetary ball mill. Milling process carried out under a high pressure nitrogen atmosphere. Specimens synthesized were characterized by using x-ray diffractometer (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and thermo gravimetric analysis/differential scanning calorimetry(TG/DSC). In order to examine hydrogenation behavior, a pressure-composition-isotherm (PCI) was performed at 323, 373, 423, 473 and 523K. In the PCI analysis, The reversible capacity in this system indicated to be about 0.81wt.%, 0.72wt.% and 1.2wt.%, respectively. The Ti-5Nb-10Cr alloy was showed the fully hydrogen capacity about 2.34wt.%. As a result, the Ti-xNb-10Cr(x = 1, 3, 5) alloys of addition to Nb considered that the excellent material of hydrogenation properties. |
|
|
| Key Words |
| Hydrogen storage alloy, Planetary ball miffing, Ti-Cr alloy, Laves phase |
|
|
 |
|
