Effect of Sintering Temperature and Particle Size on Porous SiC/Si₃N₄ Composite Ceramics

Abstract:

Porous SiC/Si₃N₄ composite ceramic was prepared at different temperatures by pressureless using SiC and Si₃N₄ as raw materials. The effects of sintering temperature and different particle size of SiC on porosity SiC/Si₃N₄ composite ceramic were investigated. The phases, microstructure and mechanical property were characterized by XRD, SEM, and compressive tests respectively. The results indicate that the increase of sintering temperature is in favor of the formation of β-Si₃N₄ crystal phase, the porosity and the compression strengthof porous SiC/Si₃N₄ composite ; The porosity of Si₃N₄/SiC block which contain particle graded higher than single particle size, but weaker compression strength.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 449-452
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.449
• Online since: November 2011
• Authors: Shuo Wang, Jun Li, Wen Jie Yuan, Hong Xi Zhu, Cheng Ji Deng
• Keywords: Compression Strength, SiC/Si₃N₄, Sintering Temperature

References

[1] K. Ishizaki and S Komarneni. Porous Materials, London: Kluwer Academic Publisher, (1998). P. 181

[2] A.G. Evans and A. Rana: Acta Metall. Vol. 28 (1980), p.129

[3] C. Chu, J.P. Singh and J.L. Roubott: J. Am. Ceram. Soc. Vol. 76 (1993), p.1349

[4] F.F. Lange: J. Am. Ceram. Soc. Vol. 56 (1973), p.445

[5] K. Ueno and S. Sodeoka, J. Ceram. Soc. Jpn. Vol. 94 (1986), p.981

[6] P.D. Shalek, J.J. Petrovic, G.F. Hurley and F.D. Gac: Am. Ceram. Soc. Bull. Vol. 65 (1986), p.351

[7] S.T. Buljian, J.G. Baldoni and M.L. Huckabee: Am. Ceram. Soc. Bull. Vol. 66 (1987), p.347

[8] H. Kodama, T. Suzuki, H. Sakamoto and T. Miyoshi: J. Am. Ceram. Soc. Vol. 73 (1990), p.445

[9] Y. Akimune, N. Hirosaki and T. Ogasawara: J. Mater. Sci. Vol. 27 (1992), p.6017