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Characterization of SiC coatings on HTGR fuel particles [electronic resource] : preliminary report

Published:
Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1979.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
Pages: 38 : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Fuel particles for the HTGR contain a layer of pyrolytic silicon carbide to act as a pressure vessel and fission product barrier. The SiC is deposited by the thermal decomposition of methyltrichlorosilane (CH/sub 3/SiC/sub 3/ or MTS) in an excess of hydrogen. Coatings deposited at temperatures from 1500 to 1700/sup 0/C and coating rates of 0.4 to 1.2 ..mu..m/min have been studied by optical microscopy, x-ray diffraction, electron microscopy, and density measurements. Transmission electron microscopy (TEM) has shown the microstructural features to be extremely complex and much finer than the ability of optical microscopy to resolve. X-ray diffraction has detected traces of ..cap alpha..-SiC in some coatings, and those conditions of deposition temperature and coating rate that give rise to this phase have been determined.
Report Numbers:
E 1.99:ornl/tm-6940
ornl/tm-6940
Subject(s):
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Note:
Published through SciTech Connect.
08/01/1979.
"ornl/tm-6940"
Lauf, R.J.; Tennery, V.J.; Braski, D.N.
Funding Information:
W-7405-ENG-26
View MARC record | catkey: 14801617