期刊
MATERIALS RESEARCH BULLETIN
卷 73, 期 -, 页码 284-289出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2015.09.021
关键词
Hydrides; Nanostructures; Microstructure; X-ray diffraction; Crystal structure
资金
- UGC, New Delhi
Five samples of MmNi(5) hydrogen storage alloy are prepared by ball-milling the MmNi(5) alloy at various speeds for different periods. For the first time, it has been shown that an optimum microstructure in terms of homogeneity, particle size, crystallite size and unit cell volume is necessary to give best hydrogenation properties. The alloy ball-milled at the speed of 100 rpm for 1 h duration shows optimum hydrogenation behaviour. This alloy is activated completely in the 2nd hydrogenation-dehydrogenation cycle with hydrogen storage capacity of 1.5 wt%, and 90% hydrogen absorption/desorption is recorded in 2 min; whereas the same for un-milled MmNi(5) alloy is 5th cycle, 1.4 wt% capacity and 5 min respectively. Optimum microstructure for the alloy ball-milled at 100 rpm for 1 h duration corresponds to homogeneous size distribution of particles with average value of 2 mu m, crystallite size as 18 nm and unit cell volume as 87.7075 angstrom(3). (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据