Fabrication of $Al_2O_3/SiC$ Composite Through Oxidation of SiC

SiC의 산화에 의한 $Al_2O_3/SiC$ 복합체의 제조

  • 김경환 (연세대학교 세라믹공학과) ;
  • 이홍림 (연세대학교 세라믹공학과) ;
  • 이형민 (연세대학교 세라믹공학과) ;
  • 홍기곤 (포항산업과학연구원)
  • Published : 1997.05.01

Abstract

The surface of SiC particles were partially oxidized to produce SiO2 layers on the SiC particles to prepare Al2O3/SiC composite by formation of mullite bonds between the grains of Al2O3 and SiC during sintering at 1$600^{\circ}C$. This process is considered to enable the sintering of Al2O3/SiC composite at lower temperature and also to relieve the stress, produced by thermal expansion mismatch between Al2O3 and SiC. In fact, Al2O3/SiC composite prepared by oxidation of SiC was observed to be more effectively sintered and densified at lower temperature. Maximum density, flexural strength and microhardness were obtained with 5.65 vol% of mullite content in Al2O3/SiC composite.

Keywords

References

  1. J. Am. Ceram. Soc. v.72 no.6 Densification of Alumina-Silicon Carbide Powder Composites: II. Microstructure Evolution and Densification H. M. Jang;W. E. Rhine;H. K. Bowen
  2. J. Am. Ceram. Soc. v.77 no.8 Processing and Microstructure Development in Alumina-Silicon Carbide Intergranular Particulate Composites A. Piciachio;S. H. Lee;G. L. Messing
  3. Journal of the European Ceramic Society v.10 no.473-477 Processing and Microstructure Development in $Al_{203}-SiC$ Nanocomposites L. C. Stearns;J. Zhao;M. P. Harmer
  4. J. Am. Ceram. Soc. v.55 no.5 Strength Degradation Processes in Thermally Shocked Alumina T. G. Cupla
  5. 窯業協會誌 v.94 no.8 Al₂O₃-SiC復合材料の微細構造と 機械的 性質 中平敦;新原晧一;平井敏雄
  6. J. Am. Ceram. Soc. v.72 no.6 Densification of Alumina-Silicon Carbide Powder Composites I. Effect of a Polymer Coating on Silicon Carbide H. M. Jang;W. E. Rhinc;H. K. Bowen
  7. J. Am. Ceram. Soc. v.73 no.7 Pressureless Sintering of SiC-Whisker-Reinforced Al₂O₃Composites: II. Effects of Sintering Additives and Green Body infiltration H. W. Lee;M. D. Sacks
  8. J. Am. Ceram. Soc. v.76 no.2 Effect of Precursor Particle Size on the Densification and Crystallization Behavior of Mullite W. G. Fahrenholtz;D. M. Smith
  9. J. Am. Ceram. Soc. v.74 no.10 Fabrication of Mullite and Mullite-Matrix Composites by Transient Viscous Sintering of Composite Powder M. D. Sacks;N. Bozkurt;G. W. Scheiffele
  10. J. Am. Ceram. Soc. v.78 no.2 Processing of Silicon carbide-Mullite-Alumina Nano-composites Y. Sakka;D. D. Bidinger;I. A. Aksay
  11. 엔지니어링 세라믹스 이홍림 역
  12. J. Am. Ceram. Soc. v.73 no.6 Active-to-Passive Transition in the Oxidation of Silicon Carbide and Silicon Nitride in Air W. L. Vaughn
  13. J. Am. Ceram. Soc. v.42 no.12 Oxidation of Silicon Carbide P. J. Jorgensen;M. E. Wadsworth;I. B. Cutler
  14. J. Am. Ceram. Soc. v.74 no.10 Mullite for Structural, Electronic and Optical Applications I. A. Aksay;D. M. Dabbs;M. Sarikaya
  15. J. Am. Ceram. Soc. v.68 no.1 Sintering and Mechanical Porperties of Stoichiometric Mullite S. Kanzaki;H. Tabata;T. Kumazawa;S. Ohta
  16. J. Am. Ceram. Soc. v.58 no.11 Stable and Metastable Equilibria in the system SiO₂-Al₂O₃ I. A. Aksay;J. A. Pask
  17. Euro Ceramics v.1 Effect of SiO₂on gram growth and densification of Alumina prepared by sol-gel technique H. D. Kim;H. K. Kang
  18. Material Science and Technology v.11 Swain;Michael V.
  19. J. Am. Ceram. Soc. v.66 no.10 Mechanical Properities of Mullite T. I. Mah;K. S. Mazdiyasni
  20. J. Am. Ceram. Soc. v.68 no.1 Sintering and Mechanical Properties of Stoichiometric Mullite S. Kanzaki;H. Tabata;T. Kumazawa;S. Ohta
  21. J. Am. Ceram. Soc. v.77 no.10 Hardness-Grain-Size Relations in Ceramics R. W. Rice;C. C. Wu;F. Borchelt