Microstructural development in nanocrystalline extbox>MgH₂extbox> during H-absorption/desorption cycling

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• 作者：D. F&#xe1 ; tay ; T. Spassov ; P. Delchev ; G. Rib&#xe1 ; rik ; &#xc1 ; . R&#xe9 ; v&#xe9 ; sz
• 关键词：Nanocrystalline ; e="mml9">e="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4N2D5X6-4&_mathId=mml9&_user=10&_cdi=5729&_rdoc=37&_acct=C000050221&_version=1&_userid=10&md5=620e49fe0558114ec30225120
• 刊名：International Journal of Hydrogen Energy
• 出版年：2007
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：September 2007
• 卷：32
• 期：14
• 页码：2914-2919
• 文件大小：509 K

摘要

Repeated dehydriding/hydriding cycles of ball-milled nanocrystalline e="mml8">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4N2D5X6-4&_mathId=mml8&_user=10&_cdi=5729&_rdoc=37&_acct=C000050221&_version=1&_userid=10&md5=c8544be9222ff98fb00de127d23393ad" title="Click to view the MathML source">MgH₂ powders were carried out in a Sievert's-type apparatus. The microstructural changes during cycling were characterized by X-ray diffraction. Using the convolutional multiple whole profile fitting procedure, several microstructural parameters, i.e. the average grain size and the grain-size distribution of the as-milled and treated samples were determined. Based on the shrinking core model, the significant difference between the microstructures obtained after the first and repeated cyclings was explained.