Mechanical Properties of Silicon Carbide-Silicon Nitride Composites Sintered with Yttrium Aluminum Garnet

YAG상 첨가 탄화규소-질화규소 복합재료의 기계적 특성

  • 이영일 (서울시립대학교 재료공학과) ;
  • 김영욱 (서울시립대학교 재료공학과) ;
  • 최헌진 (한국과학기술원 복합기능세라믹스연구센터) ;
  • 이준근 (한국과학기술원 복합기능세라믹스연구센터)
  • Published : 1999.08.01

Abstract

Composites of SiC-Si3N4 consisted of uniformly distributed elongated $\beta$-Si3N4 grains and equiaxed $\beta$-SiC grains were fabricated with $\beta$-SiC,. $\alpha$-Si3N4 Al2O3 and Y2O3 powders. By hot-pressing and subsequent annelaing elongated $\beta$-Si3N4 grains were grown via$\alpha$longrightarrow$\beta$ phase transformation and equiaxed $\beta$-Si3N4 composites increased with increasing the Si3N4 content owing to the reduced defect size and enhanced crack deflection by elongated $\beta$-Si3N4 grains and the grain boundary strengthening by nitrogen incorporation. Typical flexural strength and fracture toughness of SiC-40 wt% Si3N4 composites were 783 MPa and 4.2 MPa.m1/2 respectively.

References

  1. Special Ceramics v.6 The Role of Boron and Carbon in the Sintering of Silicon Carbide S. Prochazka;P. Popper(ed.)
  2. J. Am. Ceram. Soc. v.77 no.2 In Situ-Toughened Silicon Carbide N. P Padture
  3. J. Mater. Sci. v.32 Strength and Fracture Toughness of In Situ-Toughened Silicon carbide D. H. Cho;Y.-W. Kim;W. J. Kim
  4. Ceram. Int. v.24 Microstructure and Mechanical Properties of Self-Reinforced Alpha-Silicon Carbide C. S Lee;Y.-W. Kim;D. H. Cho;H. B. Lee;H. J. Lim
  5. J. Am. Ceram. Soc. v.81 no.12 Effect of Iuitial α-Phase Content on Microstructure and Mechanical Properties of Sintered Silicon Carbide Y.-W. Kim;M. Mitomo;H. Emoto;J. G. Lee
  6. J. Am. Ceram. Soc. v.67 no.8 Improvements in Mechanical Properties in SiC by the Addition of TiC Particles G. C. Wei;P. F Becher
  7. J. Am. Ceram. Soc. v.79 no.6 In Situ-Toughened Silicon Carbide-Titanium Carbide Composites K. S. Cho;Y.-W. Kim;H. J. Choi;J G. Lee
  8. J. Ceram. Soc. Jpn. v.99 no.10 New Design Concept of Structural Ceramics-Ceramic Nanocomposites K. Niihara
  9. Ceram. Int. v.21 Hot Isostatic Pressing of SiC/Si₃N₄ Composite with Rare Earth Oxide Additions D. Shaoming;J. Donghang;T. Shouhong;G. Jingkun
  10. J. Am. Ceram. Soc. Fabrication and Mechanical Properties of Silicon Carbide-Silicon Nitride Composites with Oxynitride Glass Y -W. Kim;Y. I Lee;M. Mitomo;H. J. Choi;J. G. Lee
  11. J. Am. Ceram. Soc. v.64 no.9 A Critical Evalution of Indentation Techniques for Measuring Fracture Toughness.Ⅰ Direct Crack Measurements G. R. Anstis;P. Chantikul;B. R. Lawn;D. B. Marshall
  12. J. Am. Ceram. Soc. v.76 no.3 Core/Rim Structure of Liquid-Phase-Sintered Silicon Carbide L. S. Sigl;H.-J. Kleebe
  13. J. Eur. Ceram Soc. v.18 Microstructure and High-Temperature Strength of Si₃N₄-SiC Nanocomposite H. J. Park;H. E. Kim;K. Niihara
  14. J. Am Ceram. Soc. v.81 no.7 Extra-Large Grains in the Silicon Nitride Ceramics Doped with Yttria and Hafnia D. S. Park;S. Y. Lee;H. D. Kim;B J. Yoo;B. A. Kim
  15. J. Ceram. Soc. Jpn. v.103 no.3 Influence of Powder Characteristics on Liquid Phase Sintering of Silicon Carbide Y.-W. Kim;H. Tanaka;M. Mitomo;S. Otani
  16. J. Am. Ceram. Soc. v.81 no.5 Silicon Nitride/Silicon Carbide Naoncomposite Materials : I. Fabrication and mechanical Properties at Room Temperature M Herrmann;C Schuber;A. Rendtel;H Hubner
  17. J. Am. Ceram. Soc. Fine-Grained Silicon Carbide Ceramics with Oxynitride Glass Y.-W. Kim;M. Mitomo