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로켓 추진기관용 C/SiC 내열부품 개발

Development of C/SiC Composite Parts for Rocket Propulsion

  • Kim, Yunchul (The 4th R&D Institute - 1st Directorate, Agency for Defense Development) ;
  • Seo, Sangkyu (The 4th R&D Institute - 1st Directorate, Agency for Defense Development)
  • 투고 : 2018.06.07
  • 심사 : 2019.03.15
  • 발행 : 2019.04.01

초록

고체 및 액체 로켓 추진 기관 내열부품으로 사용하기 위하여 C/SiC 복합 재료를 LSI(Liquid Silicon Infiltration) 공법으로 개발하였다. 조성비에 따른 내열 특성은 아크 플라즈마, 초음속 토치 시험으로 평가하였으며 $H_2O$$CO_2$ 산화에 의한 유효 삭마식을 제시하였다. 연소시험을 통하여 고체 및 액체 추진기관용 노즐목 삽입재, 확대부 내열재 및 연소실 내열부품 등 다양한 형상으로 제작이 가능함을 확인하였으며 높은 내삭마 성능과 열구조 성능이 입증되었다.

C/SiC composites were developed by a liquid silicon infiltration(LSI) method for use as heat-resistant parts of solid and liquid rocket propulsion engines. The heat resistance characteristics according to the composition ratio (carbon / silicon / silicon carbide) were evaluated by specimen test through arc plasma, supersonic torch test. An ablation equation for oxidation reactions was presented. Through the combustion test it was verified that various parts such as nozzle insert, exit cone and combustion chamber heat resistant parts for rocket propulsion can be manufactured and proved high ablation performance and thermal structure performance.

키워드

참고문헌

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