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http://dx.doi.org/10.7736/KSPE.2012.29.3.273

Densification and Properties of ZrB2-based Ceramics for Ultra-high Temperature Applications  

Kim, Seong-Won (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology)
Kim, Hyung-Tae (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology)
Kim, Kyung-Ja (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology)
Seo, Won-Seon (Green Ceramics Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.29, no.3, 2012 , pp. 273-278 More about this Journal
Abstract
$ZrB_2$ has a melting temperature of $3245^{\circ}C$ and a low density of $6.1\;g/cm^3$, which makes this a candidate for application to ultra-high temperature over $2000^{\circ}C$. Beside these properties, $ZrB_2$ has excellent resistance to thermal shock and oxidation compared with other non-oxide engineering ceramics. This paper reviewed briefly 2 research examples, which are related to densification and properties of $ZrB_2$-based ceramics for ultra-high temperature applications. In the first section, the effect of $B_4C$ addition on the densification and properties of $ZrB_2$-based ceramics is shown. $ZrB_2$-20 vol.% SiC system was selected as a basic composition and $B_4C$ or C was added to this system in some extents. With sintered bodies, densification behavior and hightemperature (up to $1400^{\circ}C$) properties such as bending strength and hardness are examined. In the second section, the effect of the SiC size on the microstructures and physical properties is shown. $ZrB_2$-SiC ceramics are fabricated by using various SiC sources in order to investigate the grain-growth inhibition and the mechanical/thermal properties of $ZrB_2$-SiC.
Keywords
Zirconium Diboride; Ultra-high Temperature Ceramics; Densification; Properties;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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