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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.8 (2002)  >  pp.2161-2164

MATERIALS TRANSACTIONS
<<Previous article Vol.43  No.8 (2002)   pp.2161 - 2164 Next article>>

Hydrogenation of Body-Centered-Cubic Titanium-Chromium Alloys Prepared by Mechanical Grinding

Nobuhiko Takeichi1), Hiroyuki T. Takeshita1), Toshio Oishi2), Tadashi Kaneko2), Hideaki Tanaka1), Tetsu Kiyobayashi1) and Nobuhiro Kuriyama1)
1) National Institute of Advanced Industrial Science and Technology
2) Department of Materials and Engineering, Kansai University


The C15 and C14 intermetallic TiCr2−x (x=0, 0.2 and 0.5) compounds were subjected to grinding in a high-energy ball mill. The X-ray diffraction profiles showed that the crystal structure transformed from C15 and C14 to bcc after mechanical grinding for 57.6 ks. The hydrogenation properties of the TiCr2−x (x=0, 0.2 and 0.5) samples were examined by differential thermal analysis and pressure-composition isotherm measurements. The sample reacted with hydrogen at 5 MPa and 523 K by maintaining the bcc structure. An higher hydrogen content was observed for the sample with the higher Ti content. The maximum hydrogen content of TiCr2.0, TiCr1.8 and TiCr1.5 was found to be about 0.32, 0.36 and 0.47 H/M at 313 K, respectively, at 8 MPa.


Keyword:
mechanical grinding, X-ray diffraction, titanium-chromium system, solid solution phase, bcc structure, Laves phase, hydrogen storage materials

Received: May 21, 2002
Accepted: June 10, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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