Effect of Mn, Ti/Cr ratio, and heat treatment on hydrogen storage properties of TI-V-CR-MN alloys

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Title:	Effect of Mn, Ti/Cr ratio, and heat treatment on hydrogen storage properties of TI-V-CR-MN alloys
Authors:	Jeng,RR;Chou,CY;Lee,SL;Wu,YC;Bor,HY
Contributors:	機械工程學系
Keywords:	ABSORPTION-DESORPTION CHARACTERISTICS;SOLID-SOLUTION ALLOYS;PROTIUM ABSORPTION;BCC ALLOYS;MICROSTRUCTURE;VESSEL;FE
Date:	2011
Issue Date:	2012-03-27 17:06:37 (UTC+8)
Publisher:	國立中央大學
Abstract:	This study elucidates the effects of adding Mn, the Ti/Cr ratio, and high-temperature annealing on the hydrogen absorption desorption properties of Ti-V-Cr-Mn body-centered cubic alloys. The hydrogen storage properties of alloys are also modified by integrating the positive effects. X-ray diffraction analysis indicates that the lattice parameters decrease linearly with an increasing Mn content. Additionally, the reversible hydrogen desorption capacity is increased as the Mn content is increased from 0 at.% to 15 at.%, without apparently degrading hydrogen absorption capacities. Despite increasing the desorption pressure, the decrease of Ti/Cr ratio slightly reduces the absorption and desorption capacities. The Ti(33)V(33)Cr(19)Mn(15) alloy has a reversible hydrogen desorption capacity as high as 2.48 mass% at 80 degrees C. Moreover, the as-heat-treated (1200 degrees C, 10 h) Ti(31)V(33)Cr(21)Mn(15) alloy has a flatter plateau pressure and a higher amount of desorption pressure (greater than 1 atm) than those of the as-cast alloy.
Relation:	JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
Appears in Collections:	[Departmant of Mechanical Engineering ] journal & Dissertation

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