Title

Influence of Silicon Carbide Particle Size on the Microstructure and Mechanical Properties of Zirconium Diboride-silicon Carbide Ceramics

Abstract

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.

Department(s)

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

Library of Congress Subject Headings

Ceramic-matrix composites
Composite materials
Microstructure
Silicon carbide

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Elsevier, All rights reserved.

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