Ti-V-Mn alloys, which are one of the suitable materials for a high-pressure hybrid hydrogen storage vessel of 35 MPa, have been evaluated the hydrogenation properties and the microstructures. Among the Ti-V-Mn alloys produced by as-cast arc melting and annealing treatment at 1223 K, a Ti0.5V0.5Mn alloy particularly absorbed hydrogen up to 2.1 wt% at 260 K under 35 MPa H2. The hydrogen desorption pressure isotherm showed sloping plateau in the range of 0.3-0.6 MPa at 260 K. This effective hydrogen capacity under H2 pressure from 35 to 0.1 MPa was 1.9 wt%. The alloy mainly consisted of the hexagonal C14 Laves and BCC phases. The microstructure of the several phases in the alloy was revealed by transition electron microscopy (TEM).
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry