Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지
DOI QR코드

DOI QR Code

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 (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology(KICET)) ;
  • Jeong, Seong-Min (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology(KICET)) ;
  • Lee, Myung-Hyun (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology(KICET)) ;
  • Bae, Si-Young (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology(KICET))
  • 김경호 (한국세라믹기술원 에너지환경본부) ;
  • 정성민 (한국세라믹기술원 에너지환경본부) ;
  • 이명현 (한국세라믹기술원 에너지환경본부) ;
  • 배시영 (한국세라믹기술원 에너지환경본부)
  • Received : 2019.11.04
  • Accepted : 2019.11.27
  • Published : 2019.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

References

  1. B. -Y. Jung, M. -S. Yang, J. -H. Hwang, H. -j. Kim, Advanced glass material technology trends and industry status, Korea Evaluation Institute of Industrial Technology 11 (2016) (https://itech.keit.re.kr/index.do#04030200)
  2. H. -J. Kim, Y. -S. Han, Cover glass technology trends for mobile devices, Korea Information Display Society, 17 (2016).
  3. M.S. Dresselhaus, G. Dresselhaus, Intercalation compounds of graphite, Adv. Phys. 30 (1981) 139-326. https://doi.org/10.1080/00018738100101367
  4. H. O. Pierson, Handbook of carbon, graphite, diamond, and fullerenes, H. O. Pierson, William Andrew, New York (1993) 59.
  5. R. Mevrel, C. Duret, R. Pichoir, Pack cementation processes, Mater. Sci. Technol. 2 (1986) 201-206. https://doi.org/10.1179/mst.1986.2.3.201
  6. R. Naslain, F. Langlais, R. Fedou, The CVIprocessing of ceramic matrix composites, J. Phys. Colloq. 50 (1989) C5-191-C5-207.
  7. I. -C. Suh, W. -J. Lee, B. -H. Yeh, C. -O. Park, A study of the pack cemented sic coating on graphite by experimental design, J. Kor. Ceram. Soc. 29 (1992) 785-790.
  8. R. Pampuch, L. Stobierski, Ceramurg. Int. 3 (1977) 43. https://doi.org/10.1016/0390-5519(77)90028-X
  9. H. O. Pierson, Handbook of chemical vapor deposition, second Ed, William Andrew, New York (1999) 53.
  10. J. -I. Kim, Application of CVD SiC Material, Ceramist, 19 (2016) 14-20.
  11. K.-J. Hwang, K.-H. Kim, Y.-C. Lee, J.-T. Hwang, H.S. Lee, S.-M. Jeong, M.-H. Lee, S.-Y. Bae, Controlled infiltration profile of SiC coating layer on graphite by Si vapor deposition reaction, J. Ceram. Process. Res. 20 (2019) 169. https://doi.org/10.36410/jcpr.2019.20.2.169
  12. J. Chin, T. Ohkawa, In situ regeneration of fusion reactor first walls, Nucl. Technol., 32 (1977) 115-124. https://doi.org/10.13182/NT77-A31717
  13. K.-K. Lee, J.-H. Kim, D.-K. Kim, Mechanical properties of chemical vapor deposited SiC coating layer, Journal of the Korean Ceramic Society 43, (2006) 492-497. https://doi.org/10.4191/KCERS.2006.43.8.492