| Project/Area Number |
01580220
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
NAKAJIMA Hideo Institute for Materials Research, Tohoku University, Associate Professor, 金属材料研究所, 助教授 (30134042)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUI Hideki Institute for Materials Research, Tohoku University, Professor, 教授 (50005980)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1989: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Helium / Implantation / Nuclear Magnetic Resonance / Nuclear Reaction Method / Diffusion / Vanadium / 酸素 / ヘリウムキャビティ |
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| Research Abstract |
The present research was undertaken to elucidate the mechanism of diffusion and precipitation of helium in metals by nuclear reaction method, nuclear magnetic resonance and transmission electron microscopy.
Helium-3 ions were implanted into tantalum foils by the Extrion Implantor. The condition was follows : ion energy 90keV, 5.8x10^<16>He/cm^2, and implantation at room temperature.
The results by nuclear reaction method and nuclear magnetic resonance show that both methods are good tools to research the helium behaviour, and implanted helium already diffuses through the sample foil significantly.
For the research by TEM, helium was into vanadium alloys implanted by boron-10 method and tritium trick method. Then, the samples were irradiated by JMTR, JOYO and FFTF. After the irradiation the samples were observed by TEM ; irradiated morphology and helium cavity density were measured. These helium behaviour was discussed in terms of the atomic size effect of alloying elements.
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