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Abstract

A superior SiC based thermal protection coating process for carbon composite, which can be especially effective in a hot oxidizing atmosphere, was established in this study. A multi-coating process based on a combination of Chemical Vapor Reaction (CVR) and Chemical Vapor Deposition (CVD) was developed. Various protective coating layers on carbon composite were tested in hot oxidizing surroundings and the test results verified that the thermal ablation rate could be dramatically reduced down to 3.8% when the protective multi-coating was applied. The thermal protection mechanism of the coating layers was also investigated.

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Authors and Affiliations

Soo Bin Bae
ORCID: ORCID
Ji Eun Lee
ORCID: ORCID
Jong Gyu Paik
Nam Choon Cho
ORCID: ORCID
Hyung Ik Lee
ORCID: ORCID
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Abstract

Oxidation and indentation properties of silicon carbide-coated carbon composites were investigated to analyze its durability under atmospheric thermal shock conditions. The silicon carbide-coated samples were prepared either with chemical vapor deposition or chemical vapor reaction/chemical vapor deposition hybrid coating. The remnant weight of uncoated and coated samples was investigated after each thermal shock cycle. The surface and cross-section of coated samples were then analyzed to confirm morphological changes of the coating layers. The spherical indentation test for uncoated and coated samples were also performed. As a result, silicon carbide coating improved the oxidation resistance, elastic modulus, and hardness of carbon composites. Hybrid coating drastically enhanced the durability of samples at high temperature in atmospheric conditions.
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Authors and Affiliations

Ji Eun Lee
1
ORCID: ORCID
Soo Bin Bae
1
ORCID: ORCID
Nam Choon Cho
1
ORCID: ORCID
Hyung Ik Lee
1
ORCID: ORCID
Zicheng Meng
2
ORCID: ORCID
Kee Sung Lee
2
ORCID: ORCID

  1. Agency for Defense Development, Yuseong P.O. Box 35, Daejeon, 34186, Korea
  2. Kookmin University, School of Mechanical Engineering, JEONGNEUNG-RO 77, SEONGBUK-GU, SEOUL, 02707, KOREA

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