TY - JOUR
T1 - Effect of B4C addition on the microstructures and mechanical properties of ZrB2-SiC ceramics
AU - Chae, Jung Min
AU - Lee, Sung Min
AU - Oh, Yoon Suk
AU - Kim, Hyung Tae
AU - Kim, Kyung Ja
AU - Nahm, Sahn
AU - Kim, Seongwon
PY - 2010
Y1 - 2010
N2 - ZrB2 has a melting point of 3245°C and a relatively low density of 6.1 g/cm3, which makes this a candidate for application to ultrahigh temperature environments over 2000°C. Beside mese properties, ZrB2 is known to have excellent resistance to thermal shock and oxidation compared with other non-oxide engineering ceramics. In order to enhance such oxidation resistance, SiC was frequently added to ZrB 2-based systems. Due to nonsinterability of ZrB2-based ceramics, research on the sintering aids such as B4C or MoSi 2 becomes popular recently. In this study, densification and high-temperature properties of ZrB2-SiC ceramics especially with B4C are investigated. ZrB2-20 vol% SiC system was selected as a basic composition and B4C or C was added to this system in some extents. Mixed powders were sintered using hot pressing (HP). With sintered bodies, densification behavior and high-temperature (up to 1400°C) properties such as flexural strength, hardness, and so on were examined.
AB - ZrB2 has a melting point of 3245°C and a relatively low density of 6.1 g/cm3, which makes this a candidate for application to ultrahigh temperature environments over 2000°C. Beside mese properties, ZrB2 is known to have excellent resistance to thermal shock and oxidation compared with other non-oxide engineering ceramics. In order to enhance such oxidation resistance, SiC was frequently added to ZrB 2-based systems. Due to nonsinterability of ZrB2-based ceramics, research on the sintering aids such as B4C or MoSi 2 becomes popular recently. In this study, densification and high-temperature properties of ZrB2-SiC ceramics especially with B4C are investigated. ZrB2-20 vol% SiC system was selected as a basic composition and B4C or C was added to this system in some extents. Mixed powders were sintered using hot pressing (HP). With sintered bodies, densification behavior and high-temperature (up to 1400°C) properties such as flexural strength, hardness, and so on were examined.
KW - BC addition
KW - High-temperature mechanical properties
KW - Ultra-high temperature ceramics (UHTCs)
KW - ZrB-SiC
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U2 - 10.4191/KCERS.2010.47.6.578
DO - 10.4191/KCERS.2010.47.6.578
M3 - Article
AN - SCOPUS:78751562477
VL - 47
SP - 578
EP - 582
JO - Journal of the Korean Ceramic Society
JF - Journal of the Korean Ceramic Society
SN - 1229-7801
IS - 6
ER -
