한국표면공학회지 (52권6호 310-315)
Thickness Dependence of CVD-SiC-Based Composite Ceramic for the Mold of the Curved Cover Glass
곡면 커버 글라스용 금형 코팅을 위한 CVD-SiC 기반 세라믹 복합체의 두께에 따른 특성 연구
Kim, Kyoung-Ho;Jeong, Seong-Min;Lee, Myung-Hyun;Bae, Si-Young;
Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology(KICET);
The use of a silicon carbide (SiC)-based composite ceramic layer for the mold of a curved cover glass was demonstrated. The stress of SiC/VDR/graphite-based mold structure was evaluated via finite element analysis. The results revealed that the maximum tensile stress primarly occured at the edge region. Moreover, the stress can be reduced by employing a relatively thick SiC coating layer and, therefore, layers of various thicknesses were deposited by means of chemical vapor deposition. During growth of the layer, the orientation of the facets comprising the SiC grain became dominant with additional intense SiC(220) and SiC(004). However, the roughness of the SiC layer increased with increasing thickness of the layer and. Hence, the thickness of the SiC layer needs to be adjusted by values lower than the tolerance band of the curved cover glass mold.
SiC;VDR;CVD;mold;curved cover glass;composite ceramic;