Microstructure and Hydrogen Storage Properties of Ti-V-Fe Alloys

Abstract:

Microstructure, hydrogen storage properties and thermal stabilities of V-Ti-Fe alloys prepared by arc-melting were studied in this work. It was confirmed that V₆₀Ti₃₀Fe₁₀, V₇₀Ti₂₀Fe₁₀ and V₈₀Ti₁₀Fe₁₀ alloys are a body-centered cubic (bcc) single phase, while V₇₅Ti₁₀Fe₁₅ alloy consists of the bcc main phase and C14-typed Laves secondary phase. Experimental results show that the V₈₀Ti₁₀Fe₁₀ alloy reached the largest hydrogen absorption capacities which were about 1.9 wt.% and 1.62 wt.% at 423 K and 473 K, while V₇₅Ti₁₀Fe₁₅ alloy with C14-typed Laves phase showed better hydrogen desorption capacities with 1.31 wt.% at 423 K and 1.35 wt.% at 473 K, respectively. In addition, the DSC measurements indicate that the thermal stability of V₇₅Ti₁₀Fe₁₅ alloy with C14-typed Laves phase decreased, which is very beneficial to the improvement of dehydrogenation rate in the alloy.

• Periodical: Materials Science Forum (Volume 847)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.847.3
• Online since: March 2016
• Authors: Gang Fu, Feng Wang, Jiang Wang*, Mao Hua Rong, Zhong Min Wang, Guang Hui Rao, Huai Ying Zhou
• Keywords: Hydrogen Storage, Thermal Stability, Ti-V-Fe Alloys

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