Journal of Materials Science

, Volume 14, Issue 10, pp 2309–2316 | Cite as

Fabrication of high strength β-sialon by reaction sintering

  • M. Mitomo
  • N. Kuramoto
  • Y. Inomata


The reaction sintering of β-sialon (Si4Al2O2N6) from a powder mixture of Si3N4, Al2O3 and AIN was studied to clarify factors affecting the densification. The presence of sufficient SiO vapour on the compact and excess oxide with respect toβ-sialon composition was the most important factor. High densityβ-sialon was fabricated by heating the compact at 1800° C under 1 atm. N2. The sintering was carried out with sufficient SiO vapour pressure to prevent thermal decomposition of sintered sialon by packing the compact with a powder mixture of Si3N4 and SiO2. Care was taken to minimize the amount of excess oxide in the starting composition to obtain a high density sialon with a small amount of intergranular X-phase. The maximum density of 3.04 g cm−3 was obtained from the compact with 2 wt % excess Al2O3 in the composition. The strength of the sinteredβ-sialon was 490 MN m−2 at room temperature and 480 MN m−2 at 1200° C. The values are the best among those so far published for sinteredβ-sialons.


Powder Mixture High Temperature Strength Sialon Reaction Sinter Densification Curve 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    K. H. Jack,J. Mater. Sci. 11 (1976) 1135.CrossRefGoogle Scholar
  2. 2.
    Y. Oyama andO. Kamigaito,Yogyo-Kyokai-Shi 80 (1972) 327.CrossRefGoogle Scholar
  3. 3.
    W. J. Arrol, 2nd Army Materials Technical Conference, “Ceramics for Higher Performance Applications” (Brook Hill, Chestnut Hill, 1974) p. 729.Google Scholar
  4. 4.
    R. R. Wills, R. W. Stewart andJ. M. Wimmer,J. Amer. Ceram. Soc. 60 (1977) 64.CrossRefGoogle Scholar
  5. 5.
    J. Briggs,Mater. Res. Bull. 12 (1977) 1047.CrossRefGoogle Scholar
  6. 6.
    S. Boskovic, L. J. Gauckler, G. Petzow andT. Y. Tien,Powder Met. Int. 9 (1977) 185.Google Scholar
  7. 7.
    L. J. Gaukler, S. Boskovic, G. Petzow andT. Y. Tien, “Nitrogen Ceramics”, edited by F. L. Riley, Noordhoff, Leyden, 1977) p. 405.CrossRefGoogle Scholar
  8. 8.
    M. Mitomo, N. Kuramoto andH. Suzuki, Proceedings of the International Symposium on Factors in Densification and Sintering of Oxide and Non-oxide Ceramics, Hakone, Japan (1978) in press.Google Scholar
  9. 9.
    R. J. Lumby, B. North andA. J. Taylor, “Special Ceramics, 6” edited by P. Popper (British Ceramic Research Association, Stoke-on-Trent, 1975) p.283.Google Scholar
  10. 10.
    K. H. Jack andW. I. Wilson,Nature Phys. Sci. (London) 238 (1972) 28.CrossRefGoogle Scholar
  11. 11.
    R. J. Lumby, B. North andA. J. Taylor, “Nitrogen Ceramics”, edited by F. L. Riley (Noordhoff, Leyden, 1977) p. 393.CrossRefGoogle Scholar
  12. 12.
    M. Mitomo, Y. Yajima andN. Kuramoto,J. Amer. Ceram. Soc. (in press).Google Scholar
  13. 13.
    M. Mitomo, N. Kuramoto, M. Tsutsumi andH. Suzuki,Yogyo-Kyokai-Shi 86 (1978) 526.CrossRefGoogle Scholar
  14. 14.
    L. J. Gauckler, S. Prietzel, G. Bodemer andG. Petzow, “Nitrogen Ceramics”, edited by F. L. Riley, Noordhoff, Leyden, 1977) p. 529.CrossRefGoogle Scholar
  15. 15.
    M. Mitomo, N. Kuramoto andY. Yajima,Yogyo-Kyokai-Shi (in press).Google Scholar
  16. 16.
    M. Mitomo, M. Tsutsumi, E. Bannai andT. Tanaka,Amer. Ceram. Soc. Bull. 55 (1976) 313.Google Scholar
  17. 17.
    M. Mitomo,J. Mater. Sci. 11 (1976) 1103.CrossRefGoogle Scholar
  18. 18.
    L. J. Gauckler, S. Boskovic, I. K. Naik andT. Y. Tien, Proceedings of the Workshop on Ceramics for Advanced Heat Engines, Florida (1977) p. 321.Google Scholar
  19. 19.
    M. Benn, M. Kuwabara andF. L. Riley, “Science of Ceramics”, Vol. 9 (British Ceramic Society, 1977) p. 119.Google Scholar
  20. 20.
    I. K. Naik, L. J. Gauckler andT. Y. Tien,J. Amer. Ceram. Soc. 61 (1978) 332.CrossRefGoogle Scholar
  21. 21.
    G. K. Layden, Rep. R75-912072-4, United Technical Research Center (1976).Google Scholar
  22. 22.
    D. W. Richardson,Amer. Ceram. Soc. Bull. 52 (1973) 560.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • M. Mitomo
    • 1
  • N. Kuramoto
    • 1
  • Y. Inomata
    • 1
  1. 1.National Institute for Researches in Inorganic MaterialsIbarakiJapan

Personalised recommendations