Abstract
Hexagonal graphitic BN (h-BN) is interesting as a second phase for high-temperature structural ceramics because it has the same crystal structure as graphite, for which fracture strength and Young’s modulus increase with increased temperature. In this study, high-temperature mechanical properties of Si3N4/BN nanocomposite were evaluated to clarify the effect of fine h-BN particles at elevated temperatures. As a result, we found that high-temperature strength and hardness of the nanocomposite were maintained up to high temperatures; also, its Young’s modulus increased gradually, concomitant with elevated temperatures up to 1400 °C. Finally, these properties were compared with those of monolithic Si3N4 and Si3N4/BN microcomposite.
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Kusunose, T., Sung, RJ., Sekino, T. et al. High-temperature properties of a silicon nitride/boron nitride nanocomposite. Journal of Materials Research 19, 1432–1438 (2004). https://doi.org/10.1557/JMR.2004.0192
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DOI: https://doi.org/10.1557/JMR.2004.0192