Microstructure and kinetics/thermodynamics of environmentally friendly and recyclable grain regulated Pr-Mg-Ni-based hydrogen storage alloys.

The high-energy mechanical milling procedure was used to manufacture the as-milled Pr 5 Mg 85 Ni 10 alloys of 5 h, 10 h, 20 h, and 30 h respectively. We have been successful in obtaining a variety of nanocrystalline and amorphous alloys with varying amounts of each. The primary phase in the interior structure of the alloys is still Mg 2 Ni and Mg, which corresponds to the second phase PrMg 12. The products of saturated hydrogen absorption include MgH 2 , Mg 2 NiH 4 , and PrH 2.93 , while the products of complete hydrogen release include Mg, Mg 2 Ni, and PrH 2. According to the findings, the amount of time spent ball-milling the alloys is the primary component that determines how well they function in terms of the dynamic performance of hydrogen absorption and desorption. The dynamic performance of the alloy in terms of hydrogen absorption and desorption is enhanced with the increasing time spent ball-milling the material. In the same vein, the alloy that has been milled for ten hours has the most desirable thermodynamic characteristics. [ABSTRACT FROM AUTHOR]