5.Comprehensive analysis of ball milling process onhydrogen storage properties of LaMgNi4 -type alloy
Author: ZENG Guang;ZHAI Tingting;YUAN Zeming;GAO Pei;FENG Dianchen
Abstract:
La 0． 7 Sm 0． 3 MgNi 3． 6 Co 0． 4 + 10% Ni alloy was prepared by ball milling． The effects of ball milling time on the microstructureand kinetic properties of La 0． 7 Sm 0． 3 MgNi 3． 6 Co 0． 4 + 10% Ni composite hydrogen storage alloy were investigated． According to XＲD anal-ysis，the sample is composed of LaMgNi 4 H 4． 85 ，LaNi 5 H 6 and Ni after hydrogen absorption． These three phases transform into LaMgNi 4 ，LaNi 5 and Ni after dehydrogenation． From the SEM analysis，it can be seen that with the extension of ball milling time，the alloy parti-cles are gradually refined，and the cracking phenomenon of the alloy due to the internal stress in the crystal lattice after hydrogen ab-sorption． Due to the change of microstructure caused by ball milling，the dynamic properties of the alloy are improved．
Keywords: RE-Mg-Ni based alloys; Mechanical lapping; Hydrogen storage; Kinetics
Full Text Link: https://link.cnki.net/doi/10.16559/j.cnki.2095-2295.2025.02.005