| Project/Area Number |
24760586
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
ENDO Naruki 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 博士研究員 (40611893)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | 水素貯蔵材料 / 高圧合成 / 放射光 / その場観察 / TiFe / BCC / 規則－不規則変態 / 水素吸蔵合金 / 高温高圧 / 放射光その場観察 / 高圧 |
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| Research Abstract |
We investigated the hydrogenation of a CsCl-type TiFe alloy at 5 GPa and 873 K by in situ synchrotron radiation X-ray diffraction measurements. After formation of a solid solution of hydrogen in TiFe, an order-disorder phase transition in the metal lattice of TiFe occurred, which yielded a BCC TiFe hydride. The unit cell volume of the BCC hydride increased by 21.0% after the hydrogenation reaction. The volume expansion was larger than that of a gamma hydride TiFeH_x (x = 1.9) prepared by hydrogenation near ambient conditions.
In order to estimate the hydrogen content of BCC hydride, we compared its lattice volume with the lattice volume of the gamma hydride at same high pressure and high temperature conditions. As a result, the lattice volume of BCC phase was almost equal to that of the gammma hydride, therefore, the hydrogen content of BCC hydride was almost equal to the gamma hydride.
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