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      ZrB 2 particles reinforced glass coating for oxidation protection of carbon/carbon composites

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          Abstract

          A dense ZrB 2 particles reinforced glass (ZrB 2/SiO 2) coating was prepared on the SiC coated carbon/carbon composites by a facile sol-dipping approach. The prepared ZrB 2/SiO 2 coating could protect the composites from being oxidized for 160 h at 1773 K with a weight loss of 6.9 mg/cm 2. The flexural strength retention ratio of the ZrB 2/SiO 2 coated composites is 87% after oxidation for 160 h at 1773 K. The continuous SiO 2 glass layer embedded with the submicron ZrSiO 4 particles was formed during oxidation. This was helpful to lower the diffusion rate of oxygen and improve the stability of SiO 2 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 ZrB 2/SiO 2 coated sample presented linear relationship, and the final weight loss per unit area was 6.35 mg/cm 2. The generation of the penetrative cracks and the debonded coating interface resulted in the failure of the ZrB 2/SiO 2 coating.

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          Author and article information

          Journal
          J Adv Ceram
          Journal of Advanced Ceramics
          Tsinghua University Press and Springer-Verlag Berlin Heidelberg (USA )
          2227-8508
          2226-4108
          01 March 2019
          01 October 2019
          : 8
          : 1
          : 102-111
          Affiliations
          aSchool of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
          Author notes
          *Corresponding author: Cuiyan LI, E-mail: licuiyan@ 123456sust.edu.cn , cuiyan.lee@ 123456163.com
          Article
          s40145-018-0298-9
          10.1007/s40145-018-0298-9
          Copyright © The Author(s)

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by/4.0/.

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          Research Article

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