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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.9 (2001)  >  pp.1862-1865

MATERIALS TRANSACTIONS
<<Previous article Vol.42  No.9 (2001)   pp.1862 - 1865 Next article>>

Protium Absorption Properties of Ti-Cr-V Alloys in Low Hydrogen Pressure Regions

Takuya Tamura1), Atsunori Kamegawa1), Hitoshi Takamura1) and Masuo Okada1)
1) Department of Materials Science, Graduate School of Engineering, Tohoku University

Ti–Cr–V alloys are known to absorb about 3.8 mass% of protium, but to desorb about 2 mass% because of the formation of stable protorides in low hydrogen pressure regions. However, few protium storage properties of the alloys in low hydrogen pressure regions were reported. This paper aims to clarify the protium absorption properties of Ti–Cr–V alloys in low hydrogen pressure regions. It was found that first low pressure plateau regions were coexistence regions of two different BCC phases for 20 at% V alloys. Decreasing V content and increasing Cr content turned out to shift the beginning of the second high pressure plateau regions to low protium concentration in unstabilizing the protorides in the first plateau regions. As a result, the Ti–52 at%Cr–20 at%V alloy was designed and found to have about 2.4 mass% protium desorption capacity in the width of the second plateau region at 273 K.


Keyword:
hydrogen storage alloy, titanium-chromium-vanadium alloy, body centered cubic phase, low hydrogen pressure region, width of plateau region

Received: April 24, 2001
Accepted: June 18, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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