Investigation on microstructure and hydrogen generation performance of Al-rich alloys

IMR OpenIR

	Investigation on microstructure and hydrogen generation performance of Al-rich alloys; Investigation on microstructure and hydrogen generation performance of Al-rich alloys
	W. Wang; D. M. Chen; K. Yang
	2010 ; 2010
发表期刊	International Journal of Hydrogen Energy ; International Journal of Hydrogen Energy
ISSN	0360-3199 ; 0360-3199
卷号	35 期号:21 页码:12011-12019
摘要	In order to study the effect of cooling rate on the microstructures and hydrogen generation performance of Al alloys, two ingots (20 g and 45 g) with a composition of 94 Al, 3.8 Ga, 1.5 In and 0.7 Sn (in mass%) were prepared by arc melting under high purity argon atmosphere, and a rod (10 g) with the same composition was cast in a vacuum chamber. The microstructures and phase compositions of the three samples were investigated by means of X-ray diffraction and scanning electron microscope with energy dispersed X-ray. The melting point of the grain boundary phase was measured using differential scanning calorimeter. Based on the structural analysis, samples with different but uniform grain sizes were cut from these alloys for H(2) generation. The reactions of Al alloys with water were measured at different temperatures. The measured H2 generation rates were found to increase rapidly once the grain size was reduced below 50 rim. An isothermal kinetic model was employed to analyze the measured kinetic data so as to obtain kinetic parameters of reactions. The reaction order (n) for these alloys was found to be about 0.7. The activation energy (E.) decreases with grain size d, i.e., 30% reduction of Er, as d was reduced from 258 to 23 rim. A mechanism of Al alloy corrosion in water was proposed. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.; In order to study the effect of cooling rate on the microstructures and hydrogen generation performance of Al alloys, two ingots (20 g and 45 g) with a composition of 94 Al, 3.8 Ga, 1.5 In and 0.7 Sn (in mass%) were prepared by arc melting under high purity argon atmosphere, and a rod (10 g) with the same composition was cast in a vacuum chamber. The microstructures and phase compositions of the three samples were investigated by means of X-ray diffraction and scanning electron microscope with energy dispersed X-ray. The melting point of the grain boundary phase was measured using differential scanning calorimeter. Based on the structural analysis, samples with different but uniform grain sizes were cut from these alloys for H(2) generation. The reactions of Al alloys with water were measured at different temperatures. The measured H2 generation rates were found to increase rapidly once the grain size was reduced below 50 rim. An isothermal kinetic model was employed to analyze the measured kinetic data so as to obtain kinetic parameters of reactions. The reaction order (n) for these alloys was found to be about 0.7. The activation energy (E.) decreases with grain size d, i.e., 30% reduction of Er, as d was reduced from 258 to 23 rim. A mechanism of Al alloy corrosion in water was proposed. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
部门归属	[wang, w.; chen, d. m.; yang, k.] chinese acad sci, inst met res, shenyang 1100166, peoples r china.;wang, w (reprint author), chinese acad sci, inst met res, shenyang 1100166, peoples r china;wei.wang@imr.ac.cn demin.chen.1@imr.ac.cn ; [wang, w.; chen, d. m.; yang, k.] chinese acad sci, inst met res, shenyang 1100166, peoples r china.;wang, w (reprint author), chinese acad sci, inst met res, shenyang 1100166, peoples r china;wei.wang@imr.ac.cn demin.chen.1@imr.ac.cn
关键词	Hydrogen Generation Hydrogen Generation Al Alloys Al Alloys Liquid Eutectic Liquid Eutectic Al Corrosion Al Corrosion Hydrolysis Reaction Hydrolysis Reaction Grain-refinement Grain-refinement Aluminum Metal Aluminum Metal Water Water Activation Activation Powder Powder Size Size Solidification Solidification Corrosion Corrosion
URL	查看原文 ; 查看原文
WOS记录号	WOS:000283959900035 ; WOS:000283959900035
引用统计	被引频次：114[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31517
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Wang,D. M. Chen,K. Yang. Investigation on microstructure and hydrogen generation performance of Al-rich alloys, Investigation on microstructure and hydrogen generation performance of Al-rich alloys[J]. International Journal of Hydrogen Energy, International Journal of Hydrogen Energy,2010, 2010,35, 35(21):12011-12019, 12011-12019.
APA	W. Wang,D. M. Chen,&K. Yang.(2010).Investigation on microstructure and hydrogen generation performance of Al-rich alloys.International Journal of Hydrogen Energy,35(21),12011-12019.
MLA	W. Wang,et al."Investigation on microstructure and hydrogen generation performance of Al-rich alloys".International Journal of Hydrogen Energy 35.21(2010):12011-12019.