Microstructure and Strength of Oxidation-Bonded Porous Silicon Nitride Ceramics


Article Preview

An oxidation bonding process was developed to fabricate oxidation-bonded porous silicon nitride (Si3N4) ceramics from α-Si3N4 powder in air at 1100-1400oC. Si3N4 particles are bonded by the oxidation-derived silica (SiO2) and the pores derive from the stack of Si3N4 particles and the release of N2 and SiO gas during the sintering. The microstructure of oxidation-bonded porous Si3N4 ceramics was observed. Moreover, the fracture mechanism was analyzed. Effects of the bonding phases and pores on the flexural strength were investigated. Oxidation-bonded porous Si3N4 ceramics with high flexural strength was obtained by restraining the crystallization of amorphous silica and forming the well-developed necks between Si3N4 particles.



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




S. Q. Ding et al., "Microstructure and Strength of Oxidation-Bonded Porous Silicon Nitride Ceramics", Key Engineering Materials, Vols. 353-358, pp. 503-506, 2007

Online since:

September 2007




[1] S. Shan, J. Yang, J. Gao, W. Zhang and Z. Jin: J. Am. Ceram. Soc. Vol. 88 (2005), p.2594.

[2] J. Yang, G. Zhang, N. Kondo, T. Ohji and S. Kanzaki: J. Am. Ceram. Soc. Vol. 88 (2005), p.1030.

[3] J. Yang, Z. Deng and T. Ohji: J. Eur. Ceram. Soc. Vol. 23 (2003), p.371.

[4] C. Kwai and A. Yamakawa: J. Am. Ceram. Soc. Vol. 80 (1997), p.2705.

[5] K. Schulz and M. Durst: Filtr. Separat. Vol. 31 (1994), p.25 A. Diaz and S. Hampshre: J. Eur. Ceram. Soc. Vol. 24 (2004), p.413.

[6] T. Fukasawa, Z. Deng and M. Ando: J. Am. Ceram. Soc. Vol. 85 (2002), p.2151.

[7] N. Miyagawa and N. Shinohara: J. Ceram. Jpn. Vol. 107 (1999), p.673.

[8] J Yang, G. Zhang and T. Ohji: J. Mater. Res. Vol. 16 (2001), p. (1916).

[9] Y. S. Touloukian: Thermophysical properties of matter. (IFI/Plenum Data Company Press, New York, Vol. 13 (1979).

[10] R. W. Rice: J. Mater. Sci. Vol. 28 (1993), p.2187.