Influence of Silicon Carbide Particle Size on the Microstructure and Mechanical Properties of Zirconium Diboride-silicon Carbide Ceramics
The influence of silicon carbide (SiC) particle size on the microstructure and mechanical properties of zirconium diboride-silicon carbide (ZrB2-SiC) ceramics was investigated. ZrB2-based ceramics containing 30vol.% SiC particles were prepared from four different α-SiC precursor powders with average particle sizes ranging from 0.45 to 10 μm. Examination of the dense ceramics showed that smaller starting SiC particle sizes led to improved densification, finer grain sizes, and higher strength. For example, ceramics prepared from SiC with the particle size of 10 μm had a strength of 389 MPa, but the strength increased to 909 MPa for ceramics prepared from SiC with a starting particle size of 0.45 μm. Analysis indicates that SiC particle size controls the strength of ZrB2-SiC.
S. Zhu et al., "Influence of Silicon Carbide Particle Size on the Microstructure and Mechanical Properties of Zirconium Diboride-silicon Carbide Ceramics," Journal of the European Ceramic Society, Elsevier, Jan 2007.
Materials Science and Engineering
Keywords and Phrases
Experimental Study; Manufacturing; Mechanical Properties; Non Oxide Ceramics; Particle Size; Scanning Electron Microscopy; Size Effect; Structural Ceramic; Zirconium Boride; Ceramic-matrix composites; Composite materials; Microstructure; Silicon carbide
Article - Journal
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