Advertisement

Journal of Materials Science

, Volume 32, Issue 18, pp 4973–4977 | Cite as

Mechanical properties and microstructure of reaction sintered β′-sialon ceramics prepared by a slip casting method

  • Seiji Hayama
  • Takakuni Nasu
  • Masakuni Ozawa
  • Suguru Suzuki
Article

Abstract

Reaction sintered β′-sialon ceramics Si6-zAlzOzN8-z, were prepared by slip casting from α-Si3N4, Al2O3, and AlN starting powders. The mechanical properties and microstructures of sintered bodies were investigated as a function of composition (varying the z value). The maximum value of the flexural strength, ∼ 600 MPa, and fracture toughness, ∼ 4.1 MPa m1/2 were observed in the z range of 0.5–1. In the z value range of 2–4, the mechanical properties decreased drastically. This phenomenon is attributed to the variation of fracture energy, which is greatly affected by the sintered crystallite size.

Keywords

Fracture Toughness Crystallite Size Fracture Energy Sialon Fracture Face 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    K. H. JACK, J. Mater. Sci. 11 (1976) 1135.CrossRefGoogle Scholar
  2. 2.
    L. J. GAUCKLER, H. L. LUKAS and G. PETZOW, J. Amer. Ceram. Soc. 58 (1975) 346.CrossRefGoogle Scholar
  3. 3.
    M. B. TRIGG and D. B. ELLSON, Brit. Ceram. Trans. J. 87 (1988) 153.Google Scholar
  4. 4.
    M. MITOMO, N. KURAMOTO, M. TSUTSUMI and H. SUZUKI, Yogyo-Kyokai-shi 86 (1978) 526.CrossRefGoogle Scholar
  5. 5.
    R. R. WILLS, R. W. STEWART and J. M. WIMMER, J. Amer. Ceram. Soc. 60 (1977) 64.CrossRefGoogle Scholar
  6. 6.
    idem. Ceramic Bull. 56 (1977) 194.Google Scholar
  7. 7.
    M. MITOMO, N. KURAMOTO and Y. INOMATA, J. Mater. Sci. 14 (1979) 2309.CrossRefGoogle Scholar
  8. 8.
    D. MUNZ, G. HIMSOLT and J. ESCHWEILER, J. Amer. Ceram. Soc. 63 (1980) 341.CrossRefGoogle Scholar
  9. 9.
    P. L. LAND, J. M. WIMMER, R. W. BURNS and N. S. CHOUDHURY, ibid. 61 (1978) 56.CrossRefGoogle Scholar
  10. 10.
    T. EKSTRÆM, P. O. KALL, M. NYGREN and P. O. OLSSON, J. Mater. Sci. 24 (1989) 1853.CrossRefGoogle Scholar
  11. 11.
    E. TANI, S. UMEBAYASHI, K. OKUZONO, K. KISHI and K. KOBAYASHI, Yogyo-Kyokai-shi 93 (1985) 370.CrossRefGoogle Scholar
  12. 12.
    M. MITOMO, N. KURAMOTO and Y. INOMATA, ibid. 88 (1980) 489.CrossRefGoogle Scholar
  13. 13.
    G. R. IRWIN, J. Appl. Mech. 29 (1962) 651.CrossRefGoogle Scholar
  14. 14.
    J. A. COPPOLA and R. C. BRADT, J. Amer. Ceram. Soc. 55 (1972) 455.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • Seiji Hayama
    • 1
  • Takakuni Nasu
  • Masakuni Ozawa
  • Suguru Suzuki
  1. 1.deramic Research LaboratoryNagoya Institute of TechnologyTajimi GifuJapan

Personalised recommendations