Hydrogen Storage Properties of Ti$_{15.4}$Zr$_{30.2}$Mn$_{44}$V$_{5.4}$Сr$_5$ Alloy Produced by Induction and Arc Melting

The hydrogen storage properties of a multi-component alloy of composition Ti0.3V0.3Mn0.2Fe0.1Ni0.1 were investigated. The alloy was synthesized by arc melting and mechanical alloying, resulting in different microstructures. It was found that the as-cast alloy is multiphase, with a main C14 Laves phase matrix along with a BCC phase and a small amount of Ti2Fe-type phase. The maximum hydrogen storage capacity of the alloy was 1.6 wt.%. We found that the air-exposed samples had the same capacity as the as-cast sample but with a longer incubation time. Synthesis by mechanical alloying for five hours resulted in an alloy with only BCC structure. The hydrogen capacity of the milled alloy was 1.2 wt.%, lower than the as-cast one. The effect of ball milling of the as-cast alloy was also studied. Ball milling for five hours produced a BCC structure similar to the one obtained by milling the raw materials for the same time.

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Microstructure and Hydrogen Storage Properties of Ti-V-Fe Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.847.3 ◽

2016 ◽

Vol 847 ◽

pp. 3-7 ◽

Cited By ~ 1

Author(s):

Gang Fu ◽

Feng Wang ◽

Jiang Wang ◽

Mao Hua Rong ◽

Zhong Min Wang ◽

...

Keyword(s):

Hydrogen Storage ◽

Secondary Phase ◽

Hydrogen Desorption ◽

Laves Phase ◽

Thermal Stabilities ◽

Hydrogen Storage Properties ◽

Dsc Measurements ◽

Arc Melting ◽

Fe Alloys ◽

Storage Properties

Microstructure, hydrogen storage properties and thermal stabilities of V-Ti-Fe alloys prepared by arc-melting were studied in this work. It was confirmed that V60Ti30Fe10, V70Ti20Fe10 and V80Ti10Fe10 alloys are a body-centered cubic (bcc) single phase, while V75Ti10Fe15 alloy consists of the bcc main phase and C14-typed Laves secondary phase. Experimental results show that the V80Ti10Fe10 alloy reached the largest hydrogen absorption capacities which were about 1.9 wt.% and 1.62 wt.% at 423 K and 473 K, while V75Ti10Fe15 alloy with C14-typed Laves phase showed better hydrogen desorption capacities with 1.31 wt.% at 423 K and 1.35 wt.% at 473 K, respectively. In addition, the DSC measurements indicate that the thermal stability of V75Ti10Fe15 alloy with C14-typed Laves phase decreased, which is very beneficial to the improvement of dehydrogenation rate in the alloy.

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Hydrogen Storage Properties of Nb-Zr-Fe Alloys Disintegrated by Hydrogen Gas

Materials Science Forum ◽

10.4028/www.scientific.net/msf.534-536.73 ◽

2007 ◽

Vol 534-536 ◽

pp. 73-76

Author(s):

Hideo Okuyama ◽

Masahiro Uda ◽

Tetsuo Uchikoshi ◽

Tohru Suzuki ◽

Yoshio Sakka

Keyword(s):

Hydrogen Storage ◽

Room Temperature ◽

Mass Difference ◽

Gas Analysis ◽

Hydrogen Gas ◽

Hydrogen Storage Properties ◽

Air Atmosphere ◽

Arc Melting ◽

Fe Alloys ◽

Storage Properties

The disintegration of 6 different Nb-Zr-Fe alloys and their hydrogen storage properties due to hydrogenation have been investigated. The hydrogenation was performed in a 0.1MPa hydrogen pressure held at room temperature in arc melting chamber without exposure to air atmosphere. The thermal stability of hydrogen dissolved in disintegrated powder was measured in the temperature range from room temperature to 600°C by using the thermal analysis equipment. Hydrogen contents in alloys were evaluated from the mass difference of TG curve and chemical determinations for hydrogen gas analysis. The values of hydrogen content are in accordance with both chemical and mass difference methods. The hydrogen contents of disintegrated alloys synthesized were in the range of 1.2-2.0 wt% which depend on the composition of alloys.

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