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http://dx.doi.org/10.5695/JKISE.2020.53.6.293

Study on the Compositional Characteristics of the PCS Coating Layer by Curing Treatment for the Protection of Graphite Mold Surface  

Kim, Kyoung-Ho (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Yoonjoo (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Shin, Yun-Ji (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Jeong, Seong-Min (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Myung-Hyun (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Bae, Si-Young (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean institute of surface engineering / v.53, no.6, 2020 , pp. 293-299 More about this Journal
Abstract
The characteristics of the polycarbosilane (PCS)-based composite ceramic layer was studied by controlling the curing temperature. The stress at the interface of the graphite and SiOC composite layer was evaluated v ia finite element analysis. As a result, the tensile stress was released as the carbon ratio of the SiC decreases. In experiment, the SiOC layers were coated on the VDR graphite block by dip-coating process. It was revealed that the composition of Si and C was effectively adjusted depending on the curing temperature. As the solution-based process is employed, the surface roughness was reduced for the appropriate PCS curing temperature. Hence, it is expected that the cured SiOC layer can be utilized to reduce cracking and peeling of SiC ceramic composites on graphite mold by improving the interfacial stress and surface roughness.
Keywords
SiC; VDR; PCS; Graphite; Functional grading materials; Composite ceramic;
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