TITLE:
Recent Advances on Preparation Method of Ti-Based Hydrogen Storage Alloy
AUTHORS:
Lina Liang, Feng Wang, Maohua Rong, Zhongmin Wang, Songtao Yang, Jiang Wang, Huaiying Zhou
KEYWORDS:
Ti-Based Alloy, Preparation Methods, Hydrogen Storage Performance, Severe Plastic Deformation, Lattice Defects
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.8 No.12,
December
22,
2020
ABSTRACT: Ti-based hydrogen storage alloy is one of the most common solid-state hydrogen storage materials due to its high hydrogen absorption capacity, low dehydrogenation temperature and rich resources. This paper mainly presents the influence of several different preparation methods of Ti-based hydrogen storage alloys on the hydrogen storage performance including traditional preparation methods (smelting, rapid quenching and mechanical alloying) and novel methods by plastic deformation (cold rolling, equal channel angular pressing and high-pressure torsion). The microstructure analysis and hydrogen storage properties of Ti-based alloy are summarized thoroughly corresponding with the preparation processes mentioned above. It was found that slight introduction of lattice defects including dislocation, grain boundary, sub-grain boundary and cracks by severe plastic deformation (SPD) was beneficial to improve the hydriding/dehydriding kinetic characteristic. However, the nonuniform composition and residual stress of the alloy may be caused by SPD, which is not conducive to the improvement of hydrogen storage capacity. In the future, it would be expected that new methods and technologies combined with dopant and modification are applied to Ti-based hydrogen storage alloys to make breakthroughs in practical application.