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High‐temperature mechanical behavior of ZrB 2 ‐based composites with micrometer‐ and nano‐sized SiC particles
Author(s) -
Guo Shuqi
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15446
Subject(s) - materials science , composite material , microstructure , equiaxed crystals , micrometer , composite number , hot pressing , amorphous solid , nano , physics , chemistry , organic chemistry , optics
Using micrometer‐ and nano‐sized SiC particles as reinforcement phase, two ZrB 2 ‐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 ZrB 2 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 micrometer‐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 MP a. In the case of nano‐sized SiC, the enhanced high‐temperature strength was observed up to 1600°C, with strength values of 680‐840 MP a.