Ti-Cr-Mo alloys show different hydrogenation properties to Ti-Cr-V and Ti-Mn-V hydrogen absorbing alloys with b.c.c. structure. Ti-Cr-Mo alloys have a smaller solid solution range (<0.5 wt.%) than Ti-Cr-V (<1.3 wt.%). In order to understand this difference, crystal structure and hydrogenation behaviors were investigated by X-ray diffraction and pressure-composition isotherms (P-C-T) measurements. Most of the alloys investigated were single bcc phase. The relation of the plateau pressure vs. lattice volume of Ti-Cr-Mo alloys was opposite to Ti-Cr-V and many of conventional intermetallic alloys. The new parameter, the radius of tetrahedral hydrogen site, is introduced. This new parameter gives a linear relationship with the plateau pressure for both Ti-Cr-Mo and Ti-Cr-V alloys. Hydrogen capacity of Ti-Cr-Mo and Ti-Cr-V are the same in a hydrogen to metal ratio basis. Slight addition of V to Ti-Cr-Mo alloys leads to dramatic increase of solid solution range.
|ジャーナル||Journal of Alloys and Compounds|
|出版ステータス||出版済み - 8 11 2003|
|イベント||Proceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, フランス|
継続期間: 9 2 2002 → 9 6 2002
All Science Journal Classification (ASJC) codes