Abstract
Silicon oxynitride ceramics are formed by reaction sintering of silicon nitride and silica with certain metal oxide additives. The reaction rate during sintering and the subsequent properties of silicon oxynitride are affected by the quantity and kinds of additives. The reaction rate increased for addition of equal molar amounts of ZrO2, ZrO2 (+2.8 mol % Y2O3), AlO1.5, LnO1.5, CeO2, MgO, in that order (where Ln=Nd, Sm, Gd, Dy, Er, Yb and Y). The lanthanide oxide (1.5 mol %)-doped silicon oxynitride ceramics had a high fracture toughness, because crack deflection occurred due to the precipitation of an intergranular crystalline phase with a high thermal expansion coefficient compared with silicon oxynitride. The oxidation rate was higher with an increasing quantity of additive. In samples containing an intergranular crystalline phase, stability of the crystalline phase is an important factor and could impair the oxidation resistance of silicon oxynitride ceramics.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S. Hampshire andK. H. Jack,Proc. Br. Ceram. Soc. 31 (1981) 37.
K. H. Jack, in “Non-Oxide Technical and Engineering Ceramics”, edited by S. Hampshire (Elsevier Applied Science, London, 1986) p. 1–30.
S. Kanzaki, O. Abe, M. Ohashi andH. Tabata, in Proceedings of 2nd International Symposium, “Ceramic Materials and Component for Engines”, Lübeck-Travemünde, FRG. edited by W. Bunk and H. Hausner (Verlag Deutsche Keramische, Gesellschaft, 1986) p. 625–631.
M. Ohashi, S. Kanzaki andH. Tabata,Seramikkusu Ronbunshi 96 (1988) 1073.
M. Ohashi, H. Tabata andS. Kanzaki,J. Mater. Sci. Lett. 7 (1988) 339.
Idem, in Proceedings of International Symposium for the Science of Sintering, Tokyo, Japan, 1987, edited by S. Somiya, M. Shimada, M. Yoshimura and R. Watanabe (Elsevier Applied Science, 1988) p. 1094–1099.
M. Ohashi, S. Kanzaki andH. Tabata,J. Amer. Ceram. Soc. in press.
Idem, in Proceedings of 1989 Annual Meeting of the Ceramic Society of Japan (2G15) p. 376.
D. B., Marshall andA. G. Evans,J. Amer. Ceram. Soc. 64 (1981) C182.
“Phase Diagrams for Ceramists”, 1969 Supplement (The American Ceramic Society, Inc., OH, USA).
G. E. Gazza, in “Progress in Nitrogen Ceramics”, edited by F. L. Riley (Nijhoff, 1983) p. 273.
L. J. Gauckler, H. Hohnke andT. Y. Tien,J. Amer. Ceram. Soc. 63 (1980) 35.
M. B. Henderson andD. Taylor,Trans. Br. Ceram. Soc. 74 (1975) 49.
M. Mitomo, F. Izumi, S. Horiuchi andY. Matsui,J. Mater. Sci. 17 (1982) 2359.
I. K. Naik, L. J. Gauckler andT. Y. Tien,J. Amer. Ceram. Soc. 61 (1978) 332.
R. E. Loehman,J. Non-Cryst. Solids 56 (1983) 123.
W. C. Butterman andW. R. Foster,Amer. Mineralogist 52 (1967) 880.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ohashi, M., Kanzaki, S. & Tabata, H. Effect of additives on some properties of silicon oxynitride ceramics. J Mater Sci 26, 2608–2614 (1991). https://doi.org/10.1007/BF02387726
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02387726