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

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1564-1567

DOI:

10.4028/www.scientific.net/KEM.353-358.1564

Citation:

H. L. Wang et al., "Mechanical Properties of ZrB2-Based Ceramics Reinforced by Nano-SiC Whiskers", Key Engineering Materials, Vols. 353-358, pp. 1564-1567, 2007

Online since:

September 2007

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Price:

$35.00

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