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HomeKey Engineering MaterialsKey Engineering Materials Vols. 474-476The Research of SiC and Si3N4 Whiskers Reinforced...

The Research of SiCand Si₃N₄Whiskers Reinforced Si₃N₄ Composites to Improve its Wear and Mechanical Properties

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Abstract:

To improve the wear and mechanical properties, SiCand Si₃N₄whiskers reinforced Si₃N₄ composites were sintered by hot press sintering technique at 1800 and 1900°C for 1 h. The Friction and wear behaviors of Si₃N₄-SiC whisker reinforced Si₃N₄ composites have been studied by using a reciprocating sliding apparatus. The results show that Si₃N₄-SiC whisker can greatly improve the hardness, fracture toughness and wear resistance of Si₃N₄. Lower sintering temperature can make both the grain dimension and interface area of the whiskers with the matrix decrease, resulting in relatively uneasy fracture of the whiskers. This uneasy fracture of the whiskers is the main reason for improvement in fracture toughness, and thus, the decrease in wear rate compared with those of the samples sintered at higher temperature and Si₃N₄material.

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Periodical:

Key Engineering Materials (Volumes 474-476)

Pages:

1881-1886

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.474-476.1881

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Online since:

April 2011

Authors:

Lian Wei Yang, Jin Hui Li, Rui Jie Wang

Keywords:

Si₃N₄, Composite, SiC Whisker, Wear

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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