Skip to main content Accessibility help
×
Home

Effect of Si2N2O content on the microstructure, properties, and erosion of silicon nitride–Si2N2O in situ composites

  • Dong-Soo Park (a1), Hyun-Ju Choi (a2), Byung-Dong Han (a1), Hai-Doo Kim (a1) and Dae-Soon Lim (a2)...

Abstract

Silicon nitride–Si2N2O in situ composites were prepared by hot pressing powder mixtures of α–Si3N4, 6 wt% Y2O3, 1 wt% Al2O3, and 0–12 wt% SiO2. X-ray diffraction (XRD) analysis indicated that the volume percents of Si2N2O were 0, 13, 31, and 54 for the composites prepared with 0, 4, 8, and 12 wt% SiO2, respectively. XRD results also indicated that both silicon nitride grains and Si2N2O grains were laid down perpendicular to hot pressing direction. As the volume percent of Si2N2O increased, the width and the amount of elongated silicon nitride grains decreased, but the fracture toughness increased. Young's modulus of the in situ composites decreased as the Si2N2O content was increased. The erosion rate decreased as the Si2N2O content was increased, in part, due to both the increased fracture toughness and the reduced grain size. Erosion of the composites occurred primarily due to the grain dislodgment. The sample without Si2N2O experienced micro-chipping due to transgranular fracture.

Copyright

References

Hide All
1.Wada, S., in Erosion of Ceramic Materials, edited by Ritter, J.E. (Key Engineering Materials, Trans Tech Publications, Uetikon-Zuerich, Switzerland, 1992), Vol. 71, p. 51.
2.Zhang, Y., Cheng, Y-B., and Lathabai, S., J. Eur. Ceram. 21, 2435 (2001).
3.Lawn, B., in Fracture of Brittle Solids, 2nd ed. (Cambridge University Press, London, United Kingdom, 1993), pp. 303304.
4.Liu, D-M., Lin, J-T., and Lee, R.R-R., Ceram. Int. 24, 217 (1998).
5.Ohashi, M., Kanzaki, S., and Tabata, H., Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi, 96, 1073 (1988).
6.Emoto, H., Mitomo, M., Wang, C-M., Hirosturu, H., and Inaba, T., J. Eur. Ceram. Soc. 18, 527 (1998).
7.Wiedhorn, S.M. and Hockey, B.J., J. Mater. Sci. 18, 766 (1983).
8.Wada, S., J. Ceram. Soc. Jpn. 104, 247 (1996).
9.Evans, A.G. and Charles, E.A., J. Am. Ceram. Soc. 59, 371 (1976).
10.Park, D-S., Roh, T-W., Han, B-D., Kim, H-D., Park, C., J. Eur. Ceram. Soc. 22, 535 (2002).
11.Lee, F., Sandlin, M.S., and Bowman, K.J., J. Am. Ceram. Soc. 76, 1793 (1993).
12.Wang, C., Emoto, H., and Mitomo, M., J. Am. Ceram. Soc. 81, 1125 (1998).
13.Ohashi, M., Nakamura, K., Hirao, K., Toriyama, M., and Kanzaki, S., Ceram. Int. 23, 27 (1997).
14.Cho, S.J., Hockey, B.J., Lawn, B.R., and Bennison, S.J., J. Am. Ceram. Soc. 72, 1249 (1989).
15.Lawn, B.R., J. Am. Ceram. Soc. 81, 1977 (1988).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed