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Change of Hydriding Properties of Gravity Cast Mg-Ni Alloys with Ni Content  

Yim, C.D. (Materials Technology Department, Korea Institute of Machinery & Materials)
Moon, Y.M. (Materials Technology Department, Korea Institute of Machinery & Materials)
You, B.S. (Materials Technology Department, Korea Institute of Machinery & Materials)
Na, Yeong-Sang (Surface Engineering Department, Korea Institute of Machinery & Materials)
Bae, Jong-Su (Materials Technology Department, Korea Institute of Machinery & Materials)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.15, no.3, 2004 , pp. 250-256 More about this Journal
Abstract
Magnesium and its alloys have the high potential as hydrogen storage materials because of their highest hydrogen storage capacity, low density and abundant resources. But poor kinetic properties of hydriding and dehydriding and high working temperature have limited their practical applications. In this study, the Mg-Ni binary alloys with different amount of Ni were produced by gravity casting and characterized in order to investigate the relationship between the microstructures and hydriding properties. The maximum hydrogen absorption capacity decreased, but the absorption kinetics increased with Ni content. The difference in the absorption kinetics was resulted from the differences in the sort and shape of primary solid phases and eutectic microstructure.
Keywords
Magnesium alloys; Hydriding properties; Microstructure; Absorption capacity; Absorption kinetics;
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