| Title |
Research Paper / Meterials Processing : Formation of Mg2NiHx Hydrogen Absorbing Materials byHydrogen Induced Mechanical Alloying |
| Authors |
홍태환(Tae Whan Hong); 임재원(Jae Won Lim); 김세광(Shae Kwang Kim); 김영직(Young Jig Kim); 박현순(Hyun Soon Park) |
| Abstract |
For the economic manufacturing of Mg₂Ni hydrogen absorbing materials, Mg and Ni chips were mechanically alloyed under 20 bar`s hydrogen atmosphere. The homogeneous Mg₂NiH_x was formed after 48hr M.A (Mechanical Alloying). The hydrogen content of Mg₂NiH_x reaches 1.75wt.% and the dehydriding reaction starts at around 210℃ The specific magnetization value is reduced from 13.7 emu/g to 0.13 emu/g with respect to mechanical alloying time. The homogeneous Mg₂NiH_x composites were obtained after 96 hr M.A. They are composed of the crystalline matrix phase and the disordered interface phase which seems to be the reason of the elevated dehydriding kinetics and decreased magnetic intensity. |