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Mechanical Properties of ZrB2-Based Ceramics Reinforced by Nano-SiC Whiskers

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Abstract:

In this paper, ZrB2-based ceramics containing up to 15 vol% nano-SiC whiskers were prepared by hot pressing at 1950°C under 20MPa pressure in flow argon. SEM and XRD techniques were used to characterize the sintered compacts. A fine and homogeneous microstructure was observed. The relative density of ZrB2-based ceramic containing 10vol% SiC whiskers reached to 97.7%. The bending strength and fracture toughness of the composite were 550 MPa and 8.08 MPa·m1/2 respectively, while those of the monolithic ZrB2 ceramic (0 vol% SiC whiskers added) were 424 MPa and 4.52 MPa·m1/2 respectively. The grain size of the ZrB2-based ceramics was reduced greatly by the addition of nano-SiC whiskers during the sintering process.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

1564-1567

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.1564

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Online since:

September 2007

Authors:

Hai Long Wang, Chang An Wang, Rui Zhang, Xing Hu, Dai Ning Fang

Keywords:

Mechanical Property, Nano-SiC Whisker, Reinforcement, ZrB2

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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