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

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 315-316)

Edited by:

Zhejun Yuan, Xipeng Xu, Dunwen Zuo, Julong Yuan and Yingxue Yao

Pages:

299-303

DOI:

10.4028/www.scientific.net/KEM.315-316.299

Citation:

J. Zhao et al., "Study on the Thermal Shock Resistance of Si3N4/TiC Nanocomposite Ceramic Tool Materials ", Key Engineering Materials, Vols. 315-316, pp. 299-303, 2006

Online since:

July 2006

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Price:

$35.00

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