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http://dx.doi.org/10.3740/MRSK.2005.15.12.802

The Effects of Amorphization on Hydrogen Absorption Properties of Zr57V36Fe7 Getter alloy  

Park Je-Shin (Minerals and materials processing Division, Materials Development Group, Korea Institute of Geoscience, Mining and Materials)
Suh Chang-Youl (Minerals and materials processing Division, Materials Development Group, Korea Institute of Geoscience, Mining and Materials)
Kim Won-Baek (Minerals and materials processing Division, Materials Development Group, Korea Institute of Geoscience, Mining and Materials)
Publication Information
Korean Journal of Materials Research / v.15, no.12, 2005 , pp. 802-808 More about this Journal
Abstract
The hydrogen sorption speeds of $Zr_{57}V_{36}Fe_7$ amorphous alloy and its crystallized alloys were evaluated at room temperature $Zr_{57}V_{36}Fe_7$ amorphous alloy was prepared by ball milling. The amorphous alloy was crystallized through two stages. Initially, $\alpha-Zr$ solid solution was appeared from the amorphous phase. Two cubic Laves compounds were precipitated afterwards from the remained amorphous and from excessively saturated solid solution at higher temperature. The hydrogen sorption speed of the partially crystallized alloy was higher than that of amorphous. The enhanced sorption speed of partially crystallized alloy was explained in terms of surface oxygen stability which has been known to retard the activation of amorphous alloys. The retardation could be reduce by crystallization process resulting in the observed increase in sorption property.
Keywords
hydrogen sorption speed; activation; Non-Evaporation Getter(NEG); amorphization; crystallization;
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