Pack-cementation 방법에 의해서 탄화규소로 도포된 탄소/탄소 복합재의 산화거동

Oxidation Behavior of SiC Coated Carbon/carbon Composite by Pack-cementation Method

  • 발행 : 2000.04.01

초록

탄소/탄소 복합재는 고온에서의 우수한 물성에도 불구하고, 산화에 대한 취약한 성질로 인하여 많은 분야에서 사용에 제약을 받고 있다. 그러므로 탄소/탄소 복합재의 산화안정성을 향상시키기 위해서 수많은 연구가 수행되어지고 있다. 본 연구에서는 고온에서 보다 개선된 물성과 높은 산화안정성을 부여하고, 타 도포물질과 비교해서 낮은 열팽창계수의 차이를 보이는 탄화규소를 Pack-Cementation 방법으로 4방향성 탄소/탄소 복합재에 도포하였다. 제작된 탄화규소로 도포된 탄소/탄소 복합재는 광학현미경의 관찰을 통하여 도포기구를 추정하였으며, 산화시험을 통하여 개선된 산화안정성을 조사하였다. 그리고 여러 시험을 종합 ·분석하여 도포공정의 최적의 반응조건을 연구하였다.

Although C/C composites have excellent mechanical properties at high temperature, the disadvantage of oxidation in air restricts their applications. Thus a lot of investments have been studied to improve this drawback. In this study, SiC used as a thermal protective coating material possesses almost the same expansion coefficient compared to that of carbon, so SiC was coated on 4D C/C composites by Pack-Cementation process. For SiC-coated C/C composites, optical microscopy observations were performed to estimate the conversion mechanism involved and air oxidation tests were also performed to evaluate the improvement of oxidation resistance. Afterwards the optimum conditions of coating process were estimated from the results of several analysis and tests.

키워드

참고문헌

  1. L'Industrie Ceramique no.845 B. Capdepuy
  2. The National Aerospace Plane T.A. Heppenheimer
  3. スペ-スプレ-ソ 開發動向調査 次世代宇宙航空機開發動向調査報告書 日本航空宇宙工業會編
  4. Carbon v.24 no.6 Borate Treatment of Carbon Fibers and Carbon/carbon Composites for Improved Oxidation Resistance D.W. Mckee
  5. U.S. DOE Rep. PNL-SA-20302 E.L. Courtrigth;J.T. Prater
  6. Proc. AIAA 7th Annual Conf. Matr. Tech./Composite Tech. G.S. Pierre
  7. NASA. CR-4701 A.W. Obst;M.W. Hyer
  8. Carbon v.26 no.5 Oxidation Behavior of Matrix Inhibited Carbon/carbon Composites D.W. Mckee
  9. Chemistry and Physics of Carbon(1st Ed.) v.16 D.W. Mckee
  10. Carbon v.27 no.3 The Effect of Acid Treatments on Subsequent Reactivity of Carbon/Carbon Composites E.J. Hippo;N. Murdie;W. Kowbel
  11. Mat. Res. Soc. Symp. Proc. v.125 A. Barkatt;E.D. Verink, Jr.;L.R. Smith
  12. Carbon v.29 ZrPt3 as High Temperature, Reflective, Oxidation-resistant Coating for Carbon/carbon Composites M.D. Alvey;P.M. George
  13. Carbon v.33 no.4 Antioxidation of Carbon/carbon Cmposites by SiC Concentration Graient and Zircon Overcoating O.Yamamoto;T. Sasmoto;M. Inagaki
  14. Carbon v.32 no.4 Oxidation of Carbon/carbon Composite Coated with SiC-(Si/ZrSi₂)-ZrSi₂ W.J. Wei;T.M. Wui
  15. Carbon v.33 no.9 A Hybrd PACVD SiC/CDC Si₃N₄/SiC Multilayer Coating Oxidation Protection of Composite H.T. Tsou;W. Kowbel
  16. 23rd Biennial Conference on Carbon Carbon 97 H.J. Joo(et al.)
  17. Proc. 7th International SAMPE Tech. Conf. Formation Mechanism of A Silicon Carbide Coating for A Reinforced Carbon/carbon Composite D.C. Roger;D.M. Shuford;J.I. Mueller
  18. Advances in inorganic Films and Coatings Silicon Carbide Coating for Carbon-carbon Pack-cementation Process O. Paccaud;A. Derre
  19. 日本金屬學會誌 コソヴア-ジョン法によるSiC層の形成機構と微細構造 M. Kondo;T. Morimoto