Synthesis of Diamond Using In-Liquid Plasma Chemical Vapor Deposition
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概要
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The synthesis of diamond using in-liquid plasma chemical vapor deposition (CVD) is investigated in this study. Plasma in methanol solution is generated by applying microwave radiation of 2.45 GHz. The composition of the solution and the pressure in the container were varied as experimental parameters. No substrate cooling equipment was required in this process owing to the cooling effect of the liquid itself. The deposits on Si substrates were identified by scanning electron microscopy (SEM) and Raman spectroscopy. A diamond film containing impurities, which was confirmed to have a growth rate of 192 μm/h, was obtained. The deposit had sufficient hardness within the 15 to 80 GPa range, which is suitable for industrial hard coating. Deposition rate increased as system pressure increased, displaying the same tendency of conventional microwave CVD. Optical emission spectroscopy was used to characterize the in-liquid plasma for chemical reaction.
- 2009-03-25
著者
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Mukasa Shinobu
Graduate School Of Science And Engineering Ehime University
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Takahashi Yoshiyuki
Graduate School Of Energy Science Kyoto University
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Nomura Shinfuku
Graduate School Of Science And Engineering Ehime University
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Toyota Hiromichi
Graduate School Of Science And Engineering Ehime University
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Inoue Toru
Geodynamics Res. Center Ehime Univ.
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Nomura Shinfuku
Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
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Okuda Shinya
Toyota Industries Corporation, 2-1 Toyoda-cho, Kariya, Aichi 448-8671, Japan
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Takahashi Yoshiyuki
Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
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