Hydrogen storage of quasicrystalline Ti38Zr45 Ni17 and after V alloying

作者：Yuan Liang^*; Wang Qing; Hou Xiao Duo; Dong Chuang; Wang Hai Bin; Ma Ren Tao; Xu Fen; Sun Li Xian

来源：Journal of Functional Materials, 2008, 39(8): 1318-1321.

• Composition design
• Desorption properties
• Hydrogen absorption
• Hydrogen storage properties
• Ti-Zr-Ni quasicrystalline alloy
• Ti-Zr-Ni-V alloy

This paper investigates hydrogen absorption and desorption properties of quasicrystalline Ti38Zr45 Ni17 and V-alloyed (Ti0.38Zr0.45 Ni0.17)100-xVx (x = 5%, 10%, 30%, 40%, 60at%). The composition design for the quasicrystal is uses the cluster line approach, where two cluster lines Zr8Ni3-Ti and Ti9Ni4-Zr intersect at the ternary quasicrystal composition Ti38Zr45 Ni17 in the Ti-Zr-Ni system. The alloy rods with a diameter of 3 mm are prepared by copper mould suction-casting method. The experimental results indicate that the Ti38Zr45Ni17 quasicrystal can absorb 0.9wt% of hydrogen at the first time at 303 K, while the first-time maximum hydrogen content at 573 K reaches 2.38wt%. The hydrogen-absorbing process is finished in a very short time, with the release of a large amount of heat which can even sinter the powder sample. The quasicrystal structure completely convert to hydrid after hydrogen absorption. 5%-30at% V alloying of the ternary quasicrystal composition enhances the first-time hydrogen absorption capacity with the maximum reaching 2.96wt% at 573 K. The solid solution alloy (Ti0.38Zr0.45 Ni0.17)40V60 absorbs hydrogen at room-temperature with a capacity of 3.2wt% hydrogen. Both the quasicrystalline and its V alloying quaternary alloy convert into hydrid after hydrogen absorption, which causes the hydrogen releases are difficult.

• 出版日期2008