Effects of Si and Ce on the microstructure and hydrogen storage property of Ti26.5Cr20V45Fe8.5Ce0.5 alloy.

Authors :: Mi, Jing
Liu, XiaoPeng
Li, ZhiNian
Jiang, LiJun
Huang, Zhuo
Wang, ShuMao
Source :: Science in China. Series E: Technological Sciences; Jan2009, Vol. 52 Issue 1, p256-259, 4p
Publication Year :: 2009
Abstract: In this paper, the effects of Si and Ce on the microstructure and hydrogen storage property of Ti<subscript>26.5</subscript>Cr<subscript>20</subscript>V<subscript>45</subscript>Fe<subscript>8.5</subscript>Ce<subscript>0.5</subscript> alloy were studied, respectively. First of all, effects of Si on the microstructure and hydrogen storage properties of Ti<subscript>26.5</subscript>Cr<subscript>20</subscript>(V<subscript>45</subscript>Fe<subscript>8.5</subscript>)<subscript>1− x </subscript>Si<subscript> x </subscript>Ce<subscript>0.5</subscript> ( x = 0, 0.5, 1.0, 1.5 and 2.0 at%) alloys were studied by X-ray diffraction, scanning electron microscopy and P-C isotherm measurements. As the Si addition increases, the hydrogen absorption capacities of alloys decrease but the equilibrium pressure increases, due to the formation of Laves phase. Secondly, the effect of Ce on Ti<subscript>26.5</subscript>Cr<subscript>20</subscript> (V<subscript>45</subscript>Fe<subscript>8.5</subscript>)<subscript>0.98</subscript>Si<subscript>2</subscript> alloy was studied. It was found that Ce addition is an effective way to eliminate the effect of Si on the hydrogen storage properties of the alloy. [ABSTRACT FROM AUTHOR]

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