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High‐Temperature Mechanical Behavior of ZrB2‐Based Composites with Micron‐ and Nano‐Sized SiC Particles

Abstract

Using micron‐ and nano‐sized SiC particles as reinforcement phase, two ZrB2‐SiC composites with high strength up to 1600°C were prepared using high‐energy ball‐milling, followed by hot‐pressing. The composite microstructure comprised finer equiaxed ZrB2 and SiC grains and intergranular amorphous phase. The temperature dependency of flexure strength related to the initial particle size of SiC. In the case of micron‐sized SiC, the high‐temperature strength was improved up to 1500°C compared to room‐temperature strength, but the strength degraded at 1600°C, with strength values of 600−770 MPa. In the case of nano‐sized SiC, the enhanced high‐temperature strength was observed up to 1600°C, with strength values of 680−840 MPa.

This article is protected by copyright. All rights reserved.

Authors:   Shuqi Guo
Journal:   Journal of the American Ceramic Society
Year:   2018
Pages:   n/a
DOI:   10.1111/jace.15446
Publication date:   21-Jan-2018
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