Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of $\alpha$-Sialon Ceramics from an Alkoxide and Their Mechanical Properties(II)

알콕사이드로 부터 $\alpha$-Sialon 세라믹스의 제조 및 기계적 성질(II)

  • 이홍림 (연세대학교 공과대학 요업공학과) ;
  • 윤창현 (연세대학교 공과대학 요업공학과)
  • Published : 1991.03.01
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Abstract

Si(OC2H5)4, commercial AlN and Y2O3 powder were used as the precusor of Si3N4, AlN, Y2O3, respectively. After Si3N4 powder was synthesized by carbothermal reduction and nitridation at 135$0^{\circ}C$ for 13h in N2 atmosphere, characteristics of synthesized powder and the ceramics sintered at 178$0^{\circ}C$ for 1h under 30MPa were investigated. In order to evaluate the reliability of sintered body, Weibull modulus was investigated. Premixing of carbon black as a reduction agent had no effect on Si(OH)4 formation, and Si3N4 powder synthesized from Si(OC2H5)4 was $\alpha$-Si3N4 single phase. Mechanical properties of sintered body were measured as follows : flexural strength ; 750MPa, fracture toughness ; 3.71Mn/3/2, hardness : 17.4GPa, thermal shock resistence temperature ; $600^{\circ}C$. Flexural strength at room temperature was 750MPa and was retained up to 110$0^{\circ}C$. The Weibull modulus of sintered body was 10.7.

Keywords

References

  1. Nitrogen Ceramics The Crystal Chemistry of the Sialon and Related Nitrogen Ceramics K.H. Jack;F.L. Riley(ed.)
  2. Am. Ceram. Soc. Bull. v.59 no.6 Fabrication, Microstructure and Strength of Sintered β-Si₃N₄Solid Solution Sunil Dutta
  3. J. Mat. Sci. v.14 Fabrication of High Strength β-Sialon by Reaction Sintering M. Mittimo;N. Kuramoto;Y. Inomata
  4. Special Ceramics of British Ceramic Proceedings No. 37,35 Reation Mechanism in the Formation of Calcium and Yttia α-β Sialon Composites P.A. Walls;D.P. Thompson
  5. Ceramic Materials and Components for Engines Some Properties of α-Sialon Ceramics K. Ishizawa(et al.);W. Bunk(ed.);H.Haysner(ed.)
  6. Ceramic Materials and Components for Engines v.15 The Strength of α-Sialon Ceramics M. Mitomo;H. Tananka;K. Muramatsu
  7. 요업학회지 v.24 no.4 카올린으로 부터 합성한 β-Sialon의 열적 기계적 성질 이홍림;임현진;김신;이형복
  8. 요업학회지 v.23 no.4 완도납석으로 부터 제조되 β-Sialon의 기계적 성질 이홍림;장병국
  9. 요업학회지 v.25 no.5 김천규석으로 부터 α-Sialon의 합성 이홍림;서원선;조덕호;이경원
  10. 요업학회지 v.24 no.1 알콜사이드로 부터 Si-Al-O-N계 분말합성 이홍림;유영창
  11. Am. Ceram. Soc. Bull. v.56 no.9 Determination of Phase Content of Si₃N₄ by X-ray Diffraction Analysis C. Gazzara;Messier
  12. Progress in Nitrogen Ceramics K.H. Jack;F.L. Riley(ed.)
  13. J. Am. Ceram. Soc. v.59 Fracture Toughness Determination by Indentation A.G. Evans;E.A. Chales
  14. J. Appl. Mech v.18 W. Weibull
  15. セラミNス v.17 no.6 阿部弘;川合實
  16. 요업학회지(투고중) 알콜사이드로부터 α-Sialon 세라믹스의 제조 기계적 성질(Ⅰ) 이홍림;윤창현;조덕호
  17. 高度技術 세라믹스 한국요업학회
  18. 엔지니어링 세라믹스 이홍림(역.)
  19. Proc 2nd Sym. Ceramic Materials and Component for Engine Gas Pressure Sintered Silcon Nitride Ceramics for Turbocharger Application Y. Hattori(et al.);W. Bunk(ed.);H. Hausner(ed.)