Effect of the Addition of Short Carbon Fiber on Thermal Insulation Properties of ZrB₂- SiC Hot-Pressed Ceramics

Abstract:

Short carbon fibers reinforced ZrB₂-SiC ceramics were prepared by hot pressing sintering process. The short carbon fibers with different volume fractions (0.2.4.6.8.10.20) were added for improving the thermal insulation properties of ZrB₂-SiC ceramics. The experimental results showed that as the content of short carbon fiber increased, the thermal diffusivity decreased from 43.9m²/s to 32.9m²/s, the thermal conductivity decreased from 104.3 W/(m·K) to 72.9 W/(m·K) and thermal insulation performance reduced by 43.1%, respectively. The enhancement of the thermal insulation properties is mainly due to high interfacial thermal resistance of short carbon fiber and matrix.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 785-790
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.785
• Online since: May 2020
• Authors: Lin Kai He, You Hong Sun, Mei Jun Liu, Qing Nan Meng*
• Keywords: Carbon Short Fiber, Interfacial Thermal Resistance, Thermal Insulation Property, ZrB₂-SiC Ceramics

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