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Journal of Advanced Ceramics 2018, 7(4): 343-351 https://doi.org/10.1007/s40145-018-0284-2
Research Article | Open Access | Issue | Published: 21 November 2018

Microstructural evolution and performance of carbon fiber-toughened ZrB2 ceramics with SiC or ZrSi2 additive

Show Author's Information Kaixuan GUIa( ),  Fangyu LIUa,  Gang WANGa,  Zhongjia HUANGa,  Ping HUb
School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
Keywords:
microstructural evolution, thermal shock resistance, oxidation resistance, carbon fibers, hot pressing
Cite this article:
GUI K, LIU F, WANG G, et al. Microstructural evolution and performance of carbon fiber-toughened ZrB2 ceramics with SiC or ZrSi2 additive. Journal of Advanced Ceramics, 2018, 7(4): 343-351. https://doi.org/10.1007/s40145-018-0284-2
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Abstract Full text About this article

ZrB2–SiC/ZrSi2 ceramics containing 30 vol% carbon fiber (Cf) additive were fabricated by hot pressing at low temperature (1500 ℃) using submicron ZrB2 powders, and their microstructural evolution and performance were investigated. The addition of SiC or ZrSi2 significantly reduced the onset sintering temperature and enhanced the densification of ZrB2. ZrB2–ZrSi2–Cf showed poor performance owing to the serious fiber degradation, while the fiber degradation was effectively inhibited in ZrB2–SiC–Cf resulting in high fracture toughness, substantial fiber pull-out, and non-brittle fracture mode for such material. The critical thermal shock temperature difference of ZrB2–SiC–Cf was up to 741 ℃, significantly higher than those of ZrB2–SiC/ZrSi2 and ZrB2–ZrSi2–Cf. Moreover, this composite displayed a good oxidation resistance at 1500 ℃ in air.


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About this article

Microstructural evolution and performance of carbon fiber-toughened ZrB2 ceramics with SiC or ZrSi2 additive

Show Author's information Kaixuan GUIa( ), Fangyu LIUa, Gang WANGa, Zhongjia HUANGa, Ping HUb
School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China

Abstract

ZrB2–SiC/ZrSi2 ceramics containing 30 vol% carbon fiber (Cf) additive were fabricated by hot pressing at low temperature (1500 ℃) using submicron ZrB2 powders, and their microstructural evolution and performance were investigated. The addition of SiC or ZrSi2 significantly reduced the onset sintering temperature and enhanced the densification of ZrB2. ZrB2–ZrSi2–Cf showed poor performance owing to the serious fiber degradation, while the fiber degradation was effectively inhibited in ZrB2–SiC–Cf resulting in high fracture toughness, substantial fiber pull-out, and non-brittle fracture mode for such material. The critical thermal shock temperature difference of ZrB2–SiC–Cf was up to 741 ℃, significantly higher than those of ZrB2–SiC/ZrSi2 and ZrB2–ZrSi2–Cf. Moreover, this composite displayed a good oxidation resistance at 1500 ℃ in air.

Keywords: microstructural evolution, thermal shock resistance, oxidation resistance, carbon fibers, hot pressing

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Publication history
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Publication history

Received: 01 March 2018
Revised: 16 May 2018
Accepted: 30 May 2018
Published: 21 November 2018
Issue date: December 2018

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© The author(s) 2018

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