Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Mechanical Properties of $\beta$-Sialon Ceramics Prepared from Wando Pyrophyllite and an Alkoxide

완도납석과 알콕사이드로부터 제조된 $\beta$-Sialon 세라믹스의 기계적 성질

  • Published : 1991.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

$\beta$-Sialon powder was prepared from Wando pyrophyllite by the carbothermic reduction and nitridation at 135$0^{\circ}C$ for 10 h nitrogen atmosphere. Amorphous silica prepared from Si(OC2H5)4 was added to Wando pyrophyllite powder in order to control the final Z value. Two different methods were applied for synthesis of $\beta$-sialon powders. In Process A, the amorphous silica prepared from Si(OC2H5)4 was admixed to Wando pyrophyllite powder. Process B was started from the mixture of Wando Y2O3 was added to the synthesized $\beta$-Sialon powders as a sintering aid, and the mixed powders were hot pressed at 175$0^{\circ}C$ for 120 min in nitrogen atmosphere under 30 MPa. Their mechanical properties were compared. The maximum values of M.O.R., hardness and KIC were 667 MPa, 16 GPa and 6.3 MN/m3/2, respectively, and they are the values obtained form $\beta$-Sialon ceramics prepared by process A of Z=0.5.

Keywords

References

  1. Am. Ceram. Soc Bull. v.64 no.12 Mechanical Properties of Engineering Ceramics H. Abe
  2. J. Am. Ceram. Soc. v.58 no.7.8 Effect of H₂-N₂Nitriding Atmospheres on the Properties of Reaction-Sintered Si₃N₄ J.A. Mangles
  3. J. Mat. Sci. v.10 Synthesis of the α-form of Silicon Nitride from Silica K. Komeya;H. Inour
  4. J. Am. Ceram. Soc. v.66 no.1 Formation of β-Si₃N₄Coatings by Chemical Vapor Deposition K. Oda;T. Yoshio;K.O-Oka
  5. J. Am. Ceram. Soc. v.56 no.628 Synthesis, Charaterization and Consolidation of Si₃N₄Obtained from Ammonolysis of SiCl₃ K.S. Mazidryasni;C.M. Cooke
  6. Am Ceram Soc. Bull. v.54 no.5 Materials Reaction-Sintered from Volcanic Ash and Al Powders in N₂ S. Umebayashi;K. Kobayashi
  7. Trans. J. Brit. Ceram. v.72 Nitrogen Ceramics K.H. Jack
  8. Yogyo-Kyokai-Shi v.90 no.10 The Strength of Hot-pressed β-Sialon with Z=3 in $Si_{6-z}Al_zO_zN_{8-z}$ S. Umebayashi;K. Kishi;K. kobayashi
  9. Yogyo-Kyokai-Shi v.92 no.1 The Strength of Hot-pressed β-Sialon with $Si_{6-z}Al_zO_zN_{8-z}$ S. Umebayashi;K. Kishi;E. Tani;K. Kobayashi
  10. Yogyo-Kyokai-Shi v.91 no.10 The Preparation of Sialon Powder from Kaolinite M. Mitomo;Mihashi
  11. J Kor. Ceram. Soc. v.21 no.1 Synthesis of β-Sialon from Hadong Pink Kaolin H.L. Lee;H.J. Lee
  12. J. Kor. Ceram. Soc. v.21 no.1 Synthesis of β-Sialon from Wando Pyrophyllite H.L. Lee;H.G. Shin
  13. J. Kor. Ceram. Soc. v.23 no.4 Mechanical Properties of β-Sialon Prepared from Wando Pyrophyllite H.L. Lee;B.K. Jang
  14. J. Kor. Ceram. Soc. v.25 no.3 Effect of SiC Dispersion on β-Sialon Prepared from Wando Pyrophyllite H.L. Lee;S. Kim;H.J. Lee
  15. Am. Ceram. Soc. Bull. v.57 no.12 Optimization of Hot-pressed $Si_3N_4-Y_2O_3$ Material G.Q. Weaver;J.W. Lucek
  16. Elements of X-ray Diffraction(2nd ed.) B.D. Cullity
  17. J. Am. Ceram. Soc. v.61 no.9,10 Insolubility of Mg in the System Al-Mg-Si-O-N L.J. Gauckler;J. Weiss;T.Y. Tien;G. Petzow
  18. J. Am. Ceram. Soc. v.59 no.7.8 Fracture Toughness Determination by Indentation A.G. Evans;E.A. Charles
  19. Nitrogen Ceramics Nitridation and Reaction Bonding F.L. Riley;F.L. Riley(ed.)
  20. J. Am. Ceram. Soc. v.62 no.11,12 Subsolidus Phase Relations in Part of the System Si, Al, Y/N, O I.K. Naik;T.Y. Tien
  21. J. Am. Ceram. Soc. v.69 no.8 Redistribution of Aluminum Ions During Processing of Sialon Ceramics D.A. Bonnell;M. Ruhle;T.Y. Tien
  22. Seoul University, Ph.D.Thesis Phase Transformation and High-Temperature Strength of $Nd_2O_3/Al_2O_3$ added Sillicon Nitride Ceramics N.K. Kim
  23. J. Kor. Ceram. Soc. v.26 no.5 Mechanical Properties of β-Sialon Ceramics Prepared from TEOS and Kaolin H.J. Lim;H.L. Lee
  24. Nitrogen Ceramics Some Properties of $Si_{6-z}zAl_zO_zN_{8-z}$ L.J. Gauckler;S. Prietzel;G. Bodemer;G. Petzow;F.L% Riley(ed.)