The Effects of Nitrogen Purity and Pressure on Combustion Synthesis of α-Si₃N₄ Powders

Abstract:

α-Si3N4 powders were fabricated through combustion synthesis (CS) process, and the effects of nitrogen purity and pressure on the combustion synthesis of α-Si3N4 specimen with large dimensions were investigated. It is shown that there exists respective nitrogen pressure limits for the initiation and the propagation of the self-sustained combustion. Moreover, it is found that there is an optimum nitrogen pressure for synthesizing tailored α-Si3N4 powders while other parameters were kept constant.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 1631-1634
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.1631
• Online since: January 2005
• Authors: Wei Ping Shen, Fei Wang, Chang Chun Ge
• Keywords: Combustion Synthesis (CS), Nitrogen Pressure, Nitrogen Purity, α-Si₃N₄ Powder

References

[1] K. Hirao, Y. Miyamoto, M. Koizumi: Adv. Ceram. Mater. Vol. 2 (1987) p.780.

[2] M. Skibska, A. Szulc, A.S. Mukasyan, V.A. Shugaev, and A.A. Shiryaev: Int. J. SHS, Vol. 2 (1993), p.247.

[3] I.G. Cano, I.P. Borovinskaya, M.A. Rodriguez, and V.V. Grachev: J. Am. Ceram. Soc., Vol. 85(2002), p.2209.

[4] V.V. Zakorzhevskii and I.P. Borovinskaya: Int. J. SHS, Vol. 9 (2000), p.171.

[5] C. P. Gazzara and D. P. Messier: Am. Ceram. Soc. Bull., Vol. 56 (1977).