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논문 기본 정보

자료유형
학술저널
저자정보
Dong Heon Lee (Kookmin University) Seong Joon Koh (Kookmin University) Soo Bin Bae (Agency for defense development) Man Young Lee (Agency for defense development) Kee Sung Lee (Kookmin University)
저널정보
한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research Vol.25 No.4
발행연도
2024.8
수록면
683 - 689 (7page)

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In this study, we investigated the effect of thermal cycling on the mechanical properties of silicon carbide (SiC)-coated carbon/carbon composites fabricated using different techniques. First, we prepared carbon/carbon composites using two fabricationtechniques: fiber-rod stacking (RS) and needle punching (NP). Second, each surface of the carbon/carbon composites wascoated with SiC using chemical vapor deposition (CVD) or chemical vapor reaction (CVR) to prevent oxidation in airat high temperatures. We prepared three samples (denoted as RS-CVD, NP-CVR, and NP-CVD based on the combinedmanufacturing and coating methods) and subjected them to 1–6 thermal shock cycles at 1500℃ in air. NP-CVD exhibitedthe highest oxidation resistance, as indicated by the minimal weight loss after thermal cycling. The coating layer of NP-CVDexhibited a higher density than that of NP-CVR, allowing for effective protection of the carbon/carbon composite from hightemperatureoxidation. In addition, NP-CVD exhibited excellent mechanical properties, including hardness, elastic modulus,and indentation strength. Furthermore, the sample showed only a slight decrease in hardness and indentation strength afterthermal cycling. These results indicate that carbon/carbon substrates prepared using NP and coated using CVD exhibitexcellent thermal and mechanical properties even after thermal cycling in air.

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