Hostname: page-component-848d4c4894-jbqgn Total loading time: 0 Render date: 2024-06-26T19:20:41.158Z Has data issue: false hasContentIssue false
  • English
  • Français

Characterization of Hot-Pressed Silicon Nitride Ceramics with Alkoxide-Derived Oxide Mixtures As the Sintering Aid

Published online by Cambridge University Press:  25 February 2011

Y. Sato ,
C. Sakurai ,
M. Ueki  and
K. Sugita
Y. Sato
Affiliation:
Advanced Mat. & Tech. Res. Lab., Nippon Steel Corp., Kawasaki 211, Japan
C. Sakurai
Affiliation:
Advanced Mat. & Tech. Res. Lab., Nippon Steel Corp., Kawasaki 211, Japan
M. Ueki
Affiliation:
Advanced Mat. & Tech. Res. Lab., Nippon Steel Corp., Kawasaki 211, Japan
K. Sugita
Affiliation:
Technical Development Bureau, Nippon Steel Corp., Futtsu 299-12, Japan
Get access

Abstract

A homogeneous mixture of Y2O3, CeO2 and MgO with a final weight ratio of 3:1: 2 was prepared by the alkoxide method. The powder mixture was then added into Si3N4 powder in amounts ranging from 4 to 12 wt%, andconsolidated by hot-pressing. Microstructure and mechanical properties of the sintered bodies were determined and compared to those of materials prepared by the conventional route of mixing the oxide powders as sintering aids individually in essentially same composition. The β-fraction (modification ratio) in same composition was higher in thesintered bodies made through the alkoxide method than those made through the conventional one. The room temperature flexural strength was maximized with 6wt% addition of the alkoxide derived oxide, whereas, 12wt% addition of the total oxide was required to maximize the strength by conventional processing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 287: Symposium K – Silicon Nitride Ceramics–Scientific and Technological Advances , 1992 , 429
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Terwilliger, G. R. and Lange, F. F., J. Am. Ceram. Soc. 57 (1), 25–29 (1974)Google Scholar
2. Tsuge, A. and Nishida, K., Am. Ceram. Soc. Bull. 57 (4), 424–426,431 (1978)Google Scholar
3. Mitomo, M. and Mizuno, K., Yogyo-Kyokai-Shi 94 (1), 106–111 (1986)Google Scholar
4. Tanaka, S., Nakano, K. and Horikiri, S., in Proceedings of the IISS Symposium, edited by Somiya, S., Shimada, M., Yoshimura, M. and Watanabe, R. (Elsevier Science Publishers, New York, (1987), pp. 980–985,Google Scholar
5. Bowen, L. J. and Carruthers, T. G., J. Mater. Sci. Lett. 13, 684–687 (1978)Google Scholar
6. Messier, D. R., Riley, F. L. and Brook, R. J., J. Mater. Sci. 13, 1199–1205 (1978)Google Scholar
7. Dislich, H., J. Non-Cryst. Solids, 80, 115–121 (1986)Google Scholar
8. Fukui, T., Sakurai, C. and Okuyama, M., ibid., 139, 205–214 (1992)Google Scholar
9. Sakurai, C., Fukui, T. and Okuyama, M., Am. Ceram. Soc. Bull. 70 (4), 673–674 (1991)Google Scholar
10. Sakka, S., J. Iron and Steel Inst. Japan 77 (3), 326–335 (1991)Google Scholar
11. Gazzara, C. P. and Messier, D. R., Am. Ceram. Soc. Bull. 56 (9), 777–780 (1977)Google Scholar