Hydrogen storage characteristics of Ti45Zr38Ni 17-xCox (x = 4, 8) alloy and quasicrystal powders produced by mechanical alloying

Akito Takasaki, A. Zywczak, Gondek, H. Figiel

研究成果: Article

12 引用 (Scopus)

抄録

The effect of substitution of Co for Ni on hydrogen storage characteristics of Ti-Zr-Ni/Co powders (Ti45Zr38Ni17- xCox (x = 4, 8)) produced by mechanical alloying (MA) was investigated. The final product after MA was amorphous for all the powders, but subsequent annealing caused the formation of the icosahedral quasicrystal (i) phase with a Ti2Ni type crystal and a C14 like Laves phases. The amount of i-phase decreased, and reversely those of Ti2Ni and the Laves phases increased with increasing the amount of Co. After hydrogenation at 573 K and at an initial hydrogen pressure of 3.8 MPa, the maximum hydrogen concentration for the annealed powders reached was about 58 at%, and all the phases in the powders transformed to metallic hydrides ((Zr,Ti)H2, Ni(Zr,Ti)H3 and Co(Zr,Ti)H3). Because of the formation of several hydrides, accelerated hydrogen desorption occurred at several temperatures. The activation energies for hydrogen desorption varied from about 70 kJ/mol to 180 kJ/mol.

元の言語English
ジャーナルJournal of Alloys and Compounds
580
発行部数SUPPL1
DOI
出版物ステータスPublished - 2013

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Quasicrystals
Mechanical alloying
Hydrogen storage
Powders
Hydrogen
Hydrides
Desorption
Hydrogenation
Substitution reactions
Activation energy
Annealing
Crystals
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

これを引用

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abstract = "The effect of substitution of Co for Ni on hydrogen storage characteristics of Ti-Zr-Ni/Co powders (Ti45Zr38Ni17- xCox (x = 4, 8)) produced by mechanical alloying (MA) was investigated. The final product after MA was amorphous for all the powders, but subsequent annealing caused the formation of the icosahedral quasicrystal (i) phase with a Ti2Ni type crystal and a C14 like Laves phases. The amount of i-phase decreased, and reversely those of Ti2Ni and the Laves phases increased with increasing the amount of Co. After hydrogenation at 573 K and at an initial hydrogen pressure of 3.8 MPa, the maximum hydrogen concentration for the annealed powders reached was about 58 at{\%}, and all the phases in the powders transformed to metallic hydrides ((Zr,Ti)H2, Ni(Zr,Ti)H3 and Co(Zr,Ti)H3). Because of the formation of several hydrides, accelerated hydrogen desorption occurred at several temperatures. The activation energies for hydrogen desorption varied from about 70 kJ/mol to 180 kJ/mol.",
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T1 - Hydrogen storage characteristics of Ti45Zr38Ni 17-xCox (x = 4, 8) alloy and quasicrystal powders produced by mechanical alloying

AU - Takasaki, Akito

AU - Zywczak, A.

AU - Gondek,

AU - Figiel, H.

PY - 2013

Y1 - 2013

N2 - The effect of substitution of Co for Ni on hydrogen storage characteristics of Ti-Zr-Ni/Co powders (Ti45Zr38Ni17- xCox (x = 4, 8)) produced by mechanical alloying (MA) was investigated. The final product after MA was amorphous for all the powders, but subsequent annealing caused the formation of the icosahedral quasicrystal (i) phase with a Ti2Ni type crystal and a C14 like Laves phases. The amount of i-phase decreased, and reversely those of Ti2Ni and the Laves phases increased with increasing the amount of Co. After hydrogenation at 573 K and at an initial hydrogen pressure of 3.8 MPa, the maximum hydrogen concentration for the annealed powders reached was about 58 at%, and all the phases in the powders transformed to metallic hydrides ((Zr,Ti)H2, Ni(Zr,Ti)H3 and Co(Zr,Ti)H3). Because of the formation of several hydrides, accelerated hydrogen desorption occurred at several temperatures. The activation energies for hydrogen desorption varied from about 70 kJ/mol to 180 kJ/mol.

AB - The effect of substitution of Co for Ni on hydrogen storage characteristics of Ti-Zr-Ni/Co powders (Ti45Zr38Ni17- xCox (x = 4, 8)) produced by mechanical alloying (MA) was investigated. The final product after MA was amorphous for all the powders, but subsequent annealing caused the formation of the icosahedral quasicrystal (i) phase with a Ti2Ni type crystal and a C14 like Laves phases. The amount of i-phase decreased, and reversely those of Ti2Ni and the Laves phases increased with increasing the amount of Co. After hydrogenation at 573 K and at an initial hydrogen pressure of 3.8 MPa, the maximum hydrogen concentration for the annealed powders reached was about 58 at%, and all the phases in the powders transformed to metallic hydrides ((Zr,Ti)H2, Ni(Zr,Ti)H3 and Co(Zr,Ti)H3). Because of the formation of several hydrides, accelerated hydrogen desorption occurred at several temperatures. The activation energies for hydrogen desorption varied from about 70 kJ/mol to 180 kJ/mol.

KW - Hydrides

KW - Hydrogen storage

KW - Laves phase

KW - Mechanical alloying

KW - Quasicrystal

KW - TiNi

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