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http://dx.doi.org/10.4191/KCERS.2006.43.8.492

Mechanical Properties of Chemical Vapor Deposited SiC Coating Layer  

Lee, Hyeon-Keun (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Jong-Ho (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Do-Kyung (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Publication Information
Journal of the Korean Ceramic Society / v.43, no.8, 2006 , pp. 492-497 More about this Journal
Abstract
SiC coating has been introduced as protective layer in TRISO nuclear fuel particle of High Temperature Gas cooled Reactor (HTGR) due to excellent mechanical stability at high temperature. In order to inhibit the failure of the TRISO particles, it is important to evaluate the fracture strength of the SiC coating layer. ]n present work, thin silicon carbide coating was fabricated using chemical vapor deposition process with different microstructures and thicknesses. Processing condition and surface status of substrate.affect on the microstructure of SiC coating layer. Sphere indentation method on trilayer configuration was conducted to measure the fracture strength of the SiC film. The fracture strength of SiC film with different microstructure and thickness were characterized by trilayer strength measurement method nanoindentation technique was also used to characterize the elastic modulus and th ε hardness of the SiC film. Relationships between microstructure and mechanical properties of CVD SiC thin film were discussed.
Keywords
Silicon carbide coating; Fracture strength; Microstructure; Trilayer strength measurement method;
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