Process for preparing graphite surface anti oxidation coating material silicon carbide for nuclear reactor |
Title： |
| Process for preparing graphite surface anti oxidation coating material silicon carbide for nuclear reactor |
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Application Number： |
200310121765 |
Application Date： |
2003/12/23 |
Announcement Date： |
2004/12/15 |
Pub. Date： |
2007/03/14 |
Publication Number： |
1554802 |
Announcement Number： |
1304638 |
Grant Date： |
2007-3-14 |
Granted Pub. Date： |
2007-3-14 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C23C 20/08 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Fu Zhiqiang, Tang Chunhe, Liang Tongxiang |
Key Words： |
graphite, anti oxidation, coating material, silicon carbide, nuclear reactor |
Abstract： |
The present invention discloses the preparation process of antioxidant silicon carbide coating on the surface of graphite for nuclear reactor. The preparation process includes first coating polycarbosilane (PCS) solution on the surface of substrate to form PCS coating after volatizing solvent; and high temperature cracking the PCS coating in protecting gas containing Si while regulate cracking temperature and cracking atmosphere independently to realize required C/Si ratio in silicon carbide. Adding gas containing Si component into the cracking atmosphere can make cracked PCS to react with gas containing Si component to avoid free carbon in prepared SiC while maintaining the ceramic yield. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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