Formation of microstructures in Ti-Cr-V alloys with high hydrogen sorption capacity

Abstract

TiVCr alloys known for their potentially large hydrogen uptake were formulated as (TiCr 1.8) 100-x V x in order to quantify the impact of the vanadium concentration. Parallel to this series of pure ternaries, a second one was synthesized with 4 mol.% of Zr 7 Ni 10 addition. Structural investigation and electrochemical charging with hydrogen revealed a fair dependence of the hydrogen uptake and hydride stability on the vanadium content, but conversely different due to the presence of the Zr-Ni additive.

Influence of Ti-Rich Secondary Phase on the Hydrogen Storage Performance of V-Based Hydrogen Storage Alloys

“…Reported methods for improving activation performance include: 1. Introducing various additives such as Hf–Ni, Zr–Ni, LaNi 5 . 2.…”

Effect of the Addition of 4 wt% Zr to BCC Solid Solution Ti52V12Cr36 at Melting/Milling on Hydrogen Sorption Properties

“…Additives could introduce secondary phases which help the first hydrogenation (Miraglia et al, 2012;Bibienne et al, 2015;Kamble et al, 2017). Skryabina et al (Skryabina et al, 2016) melted (TiCr 1.8 ) 100-x V x for x 20, 40, 60, and 80 with 4 mol% Zr 7 Ni 10 and reported the dependence of hydrogen uptake, reversible hydrogen capacity and desorption temperature on the vanadium content, and dependence upon melted with the Zr-Ni additive. Miraglia et al (Kamble et al, 2017) found dramatic improvement in activation when 4 wt% Zr 7 Ni 10 was added to BCC Ti 33 V 30 Cr 37 alloy by induction melting.…”