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Microstructure and Properties of an HfB2-SiC Composite for Ultra High Temperature Applications

✍ Scribed by F. Monteverde; A. Bellosi

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
201 KB
Volume
6
Category
Article
ISSN
1438-1656

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✦ Synopsis

An ultra‐high‐temperature ceramic (UHTC) based on HfB~2~ was produced. The microstructure consisted of fine and regular diboride grains (2 μm average size), with SiC particulate distributed intergranularly, not rarely in clustered formation, and low levels of secondary phases were identified. The resulting thermo‐mechanical properties proved interesting results for microhardness and fracture toughness. The microstructural alteration experienced within the explored temperature range renders the material unsuitable for service in extreme conditions of temperature and pressure.

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