Hydrogen storage alloy having laves phase and production method therefor
AssigneeThe Japan Steel Works, Ltd.
InventorsYasuhiro Aoki, Takaaki Miyaki
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Abstract
The present invention is to obtain a Ti—Zn—Mn—V—Fe based hydrogen storage alloy having the excellent hydrogen absorbing and discharging performance at a low cost. An alloy represented by the general formula: Ti1−xZrxMnw−y−zVyFez (wherein 0≦x≦0.5, 0<y≦0.6, 0<z≦0.2, and 1.8≦w≦2.2) is produced using a ferrovanadium (alloy of a V and an Fe) as one of the raw materials. The oxygen content of the alloy is limited to 5,000 ppm or less. A hydrogen storage alloy having the excellent hydrogen absorbing and discharging performance can be produced using an inexpensive ferrovanadium. Furthermore, an impurity oxygen, which adversely effect the performance, can be limited easily.
Claims18
A production method for a hydrogen storage alloy having a Laves phase represented by the general formula:
- Ti1−xZrxMnw−y−zVyFez, wherein 0≦x≦0.5, 0<y≦0.6, 0<z≦0.2, and 1.8≦w≦2.2,
- comprising forming said hydrogen storage alloy by melting raw materials, wherein said raw materials comprise an alloy comprising a vanadium and an iron.
A production method for a hydrogen storage ally having a Laves phase represented by the general formula:
- Ti1−xZrxMnw−y−zVyFez, wherein 0≦x≦0.5, 0<y≦0.6, 0<z≦0.2, and 1.8≦w≦2.2, said production method comprising the steps of:
- providing separately a titanium, a zirconium, and a manganese as raw materials;
- providing a ferrovanadium as another raw material;
- integrally melting the titanium, the zirconium, the manganese and the ferrovanadium;
- quenching and solidifying the melted raw materials.
Dependencies are inferred from the claim text.