Study on the Thermal Shock Resistance of Si₃N₄/TiC Nanocomposite Ceramic Tool Materials

Abstract:

By adding nano Si3N4 and nano TiC particles into the micro Si3N4 matrix, the Si3N4/TiC nanocomposite ceramics were fabricated via hot pressing technique with Al2O3 and Y2O3 as sintering additives. The thermal shock resistance of Si3N4/TiC nanocomposites were investigated by means of indentation-quenching and quenching-retained strength testing methods. The results revealed that the composite containing 10 wt.% nano Si3N4 particles and 15 wt.% nano TiC nano particles was possessed of the highest thermal shock resistance, with its critical temperature difference being 700~750
. The toughening and strengthening mechanisms by the nano particles addition are deem to be the essential course for the improved thermal shock resistance.

• Periodical: Key Engineering Materials (Volumes 315-316)
• Pages: 299-303
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.315-316.299
• Online since: July 2006
• Authors: Jun Zhao, Xing Ai, Z.J. Lv
• Keywords: Mechanical Property, Microstructure, Nanocomposite, Thermal Shock Resistance

References

[1] J. Zhao, X. Ai and J.X. Deng: J. Eur. Ceram. Soc., Vol. 24 (2004), p.847.

[2] K. Niihara: J. Ceram. Soc. Jpn., Vol. 99 (1991), p.974.

[3] S. Maensiri and S.G. Roberts: J. Am. Ceram. Soc., Vol. 85 (2002), pp. (1971).

[4] S. Maensiri and S.G. Roberts: J. Eur. Ceram. Soc., Vol. 22 (2002), p.2945.

[5] T. Andersson and D.J. Rondiffe: J. Am. Ceram. Soc., Vol. 79 (1996), p.1509.