탄화규소로 코팅된 탄소-탄소 복합재료의 단열 특성 = Characterizations on the Thermal Insulation of SiC Coated Carbon-Carbon Composites

다국어 초록 (Multilingual Abstract)

This study investigates the characterization on the thermal insulation properties of silicon carbide coating on the Cf-C composites. The silicon carbide coatings by chemical vapor deposition on the C/C composites are prepared to evaluate thermal resistance. Firstly, we perform the basic insulation test by thermal shock at 1350oC in air on the C/C composite and SiC-coated C/C composite. We also performed the burner tests on the surface of the composites at high temperatures such as 1700 and 2000oC, and the weight change after burner tests are measured. The damages on the surface of C/C composite and SiC-coated composite are observed. As a result, the SiC coating is beneficial to protect the C/C composite from high temperature even though damages such as defoliation, crack and voids are observed during burner test at 2000oC.

국문 초록 (Abstract)

본 논문에서는 탄화규소로 코팅된 탄소-탄소복합재료의 단열 특성을 고찰하였다. 탄소-탄소 복합재료 상에 탄화규소를 화학증착법(CVD)법으로 코팅하였다. 먼저 탄화규소로 코팅한 복합재와 코팅되지 않은 복합재에대해, 공기 중에서 1350oC의 온도를 급작스럽게 부가하였을 때의 단열특성을 서로 비교하는 연구를 수행하였다.
또한 본 연구에서는 최대 1700oC 및 2000oC의 온도에 복합재의 표면을 노출시키는 고온 버너실험을 수행하였다.
버너실험 전, 후의 무게를 측정하여 무게변화를 고찰하였다. 고온 버너실험 후 탄소-탄소 복합재 및 탄화규소로코팅된 복합재의 손상여부를 비교, 고찰하였다. 그 결과 2000oC의 온도에 노출 시 탄화규소 코팅재에서 박리, 균열, 공동 등의 결함손상들이 발견되었으나, 고온으로부터 탄소-탄소 복합재를 보호하는데 효과적이었다.

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