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Journal of Advanced Ceramics 2019, 8(1): 102-111 https://doi.org/10.1007/s40145-018-0298-9
Research Article | Open Access | Issue | Published: 13 March 2019

ZrB2 particles reinforced glass coating for oxidation protection of carbon/carbon composites

Show Author's Information Cuiyan LI( ),  Guibiao LI,  Haibo OUYANG,  Jing LU
School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
Keywords:
ZrB2/SiO2 coating, silica sol, dipping, oxidation resistance
Cite this article:
LI C, LI G, OUYANG H, et al. ZrB2 particles reinforced glass coating for oxidation protection of carbon/carbon composites. Journal of Advanced Ceramics, 2019, 8(1): 102-111. https://doi.org/10.1007/s40145-018-0298-9
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Abstract Full text About this article

A dense ZrB2 particles reinforced glass (ZrB2/SiO2) coating was prepared on the SiC coated carbon/carbon composites by a facile sol-dipping approach. The prepared ZrB2/SiO2 coating could protect the composites from being oxidized for 160 h at 1773 K with a weight loss of 6.9 mg/cm2. The flexural strength retention ratio of the ZrB2/SiO2 coated composites is 87% after oxidation for 160 h at 1773 K. The continuous SiO2 glass layer embedded with the submicron ZrSiO4 particles was formed during oxidation. This was helpful to lower the diffusion rate of oxygen and improve the stability of SiO2 glass film, thus improving the oxidation resistance of the coated samples. After thermal cycles between 1773 K and room temperature for 15 times, penetrated cracks formed in the coating. The weight loss of the ZrB2/SiO2 coated sample presented linear relationship, and the final weight loss per unit area was 6.35 mg/cm2. The generation of the penetrative cracks and the debonded coating interface resulted in the failure of the ZrB2/SiO2 coating.


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About this article

ZrB2 particles reinforced glass coating for oxidation protection of carbon/carbon composites

Show Author's information Cuiyan LI( ), Guibiao LI, Haibo OUYANG, Jing LU
School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China

Abstract

A dense ZrB2 particles reinforced glass (ZrB2/SiO2) coating was prepared on the SiC coated carbon/carbon composites by a facile sol-dipping approach. The prepared ZrB2/SiO2 coating could protect the composites from being oxidized for 160 h at 1773 K with a weight loss of 6.9 mg/cm2. The flexural strength retention ratio of the ZrB2/SiO2 coated composites is 87% after oxidation for 160 h at 1773 K. The continuous SiO2 glass layer embedded with the submicron ZrSiO4 particles was formed during oxidation. This was helpful to lower the diffusion rate of oxygen and improve the stability of SiO2 glass film, thus improving the oxidation resistance of the coated samples. After thermal cycles between 1773 K and room temperature for 15 times, penetrated cracks formed in the coating. The weight loss of the ZrB2/SiO2 coated sample presented linear relationship, and the final weight loss per unit area was 6.35 mg/cm2. The generation of the penetrative cracks and the debonded coating interface resulted in the failure of the ZrB2/SiO2 coating.

Keywords: ZrB2/SiO2 coating, silica sol, dipping, oxidation resistance

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Publication history
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Publication history

Received: 06 June 2018
Revised: 30 September 2018
Accepted: 01 October 2018
Published: 13 March 2019
Issue date: March 2019

Copyright

© The author(s) 2019

Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant Nos. 51302160 and 51402177), the Science and Technique Talent Project of Shaanxi Province (Grant No. 2016KJXX-07), Natural Science Foundation of Shaanxi Province (Grant No. 2018JM5038), Natural Science Foundation of Education Department of Shaanxi Province (Grant No. 14JK1103), and Research Foundation of Shaanxi University of Science & Technology (Grant No. BJ14-20).

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