Abstract
ZrB2–SiC–Cf composites containing 20–50 vol% short carbon fibers were hot pressed at low sintering temperature (1450 °C) using nanosized ZrB2 powders, in which the fiber degradation was effectively inhibited. The strain-to-failure values of such composites increased with increasing fiber content, and the value for the composite with 50 vol% Cf was even more than 3 times higher than that of the composite with 20 vol% Cf. Furthermore, the composite exhibited non-brittle fracture mode when the fiber content was above 30 vol%, and the thermal shock critical temperature difference of the composite with 30 vol% Cf was up to 727 °C, revealing excellent thermal shock resistance of this composite. Additionally, ZrB2–SiC–Cf composites displayed good oxidation resistance when the fiber content was below 40 vol%, suggesting that this method provides a promising way for preparation of high-performance ZrB2–SiC–Cf composites at low temperature.
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Acknowledgements
Financial support of this work was provided by the Innovative Research Group of National Natural Science Foundation of China (No. 11421091), the National Fund for Distinguished Young Scholars (No. 51525201), and the Fundamental Research Funds for the Central Universities (Grant No. HIT.BRETIII.201506).
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Wenhu Hong and Kaixuan Gui contributed equally to this work.
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Hong, W., Gui, K., Hu, P. et al. Preparation and characterization of high-performance ZrB2–SiC–Cf composites sintered at 1450 °C. J Adv Ceram 6, 110–119 (2017). https://doi.org/10.1007/s40145-017-0223-7
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DOI: https://doi.org/10.1007/s40145-017-0223-7