TED-AJ03-362 RADIATION INDUCED SURFACE ACTIVATION : WETTABILITY CAUSED BY SELF INDUCED ACTIVATION
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概要
- 論文の詳細を見る
Improving the limit of boiling heat transfer or critical heat flux requires that the cooling liquid can contact the heating surface, or a high-wettability, highly hydrophilic heating surface, even if a vapor bubble layer is generated on the surface. We investigated surface wettability using metal oxides irradiated by γ-rays under normal room conditions. Contact angle, an indicator of macroscopic wettability, was measured by image-processing of the images obtained by a CCD video camera. The results showed that the surface wettability on oxidized metal pieces of titanium, zircaloy No.4,SUS-304,and copper was improved significantly by the Radiation Induced Surface Activation (RISA) phenomenon. Highly hydrophilic conditions of the test pieces were achieved after 500-kGy irradiation by ^<60>Co γ-rays. To check the RISA with radioactive metal under non-γ-ray environment use, surface wettability was investigated using metal oxides irradiated by radiation rays emitted from radioactive in the metals in room temperature conditions. The contact angle decreased linearly with integrated irradiation of neutron rays and kept in low contact angle for longer than 400 hours. These results revealed that the self-induced RISA existed with radioactive metals.[figure]
- 一般社団法人日本機械学会の論文
著者
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Furuya M
Central Research Institute Of Electric Power Industry
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Furuya Masahiro
Central Research Institute Of Electric Power Industry (criepi)
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Furuya Masahiro
Central Research Institute Of Electric Power Industry
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Okamoto Koji
University Of Tokyo
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TAKAMASA Tomoji
Tokyo University of Mercantile Marine
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HAZUKU Tatsuya
Tokyo University of Mercantile Marine
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Imai Yasuyuki
University Of Tokyo
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Hazuku Tatsuya
Tokyo University Of Marine Science And Technology
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Takamasa Tomoji
Tokyo University Of Marine Science And Technology
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- TED-AJ03-362 RADIATION INDUCED SURFACE ACTIVATION : WETTABILITY CAUSED BY SELF INDUCED ACTIVATION
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- Preface
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- 3D Shape Reconstruction from Synthetic Images Captured by a Rotating Periscope System with A Single Focal Direction
- Mechanism of Hydrophilicity by Radiation-Induced Surface Activation
- Electrical Conductivity of TiO2 Thin Film on Insulator Induced by Radiation Exposure
- Stability Estimation of ABWR on the Basis of Noise Analysis