Influence of the Content of B4C on Microstructure and Oxidation Resistance of Carbon/Carbon Composites Modified by a Sol-Gel/Solvothermal Process

Jia Zhu; Jian Feng Huang; Li Yun Cao; Jian Peng Wu

doi:10.4028/www.scientific.net/KEM.512-515.757

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Influence of the Content of B4C on Microstructure...

Influence of the Content of B₄C on Microstructure and Oxidation Resistance of Carbon/Carbon Composites Modified by a Sol-Gel/Solvothermal Process

Abstract:

In order to improve the oxidation resistance property of carbon/carbon composites, the C/C matrix was modified with a borate sol precursor and B₄C micro-powders by a sol-gel integrating with a solvothermal process. The phase compositions, surface and cross-section microstructures of the C/C matrix modified by different B₄C content were particularly investigated. Results show that the surface of the modified composites is covered by a coating composed of B₂O₃ and B₄C, meanwhile, the internal micro-holes of the C/C composites are occupied by B₂O₃ and B₄C. After oxidation in air at 973 K, the B₂O₃ glassy phase, due to the oxidation of B₄C, seals the cracks and holes and effectively prevents C/C composites from oxidation. The weight loss of the modified C/C composites is only 2.21 % after oxidation in air at 973 K for 20 h.

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Key Engineering Materials (Volumes 512-515)

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757-760

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https://doi.org/10.4028/www.scientific.net/KEM.512-515.757

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June 2012

Authors:

Jia Zhu, Jian Feng Huang, Li Yun Cao, Jian Peng Wu

Keywords:

Carbon/Carbon Composite, Modification Index, Oxidation, Solvothermal Process

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References

[1] I. Golecki, R.C. Morris and D. Narasimhan, et al., Rapid densification of porous carbon–carbon composites by thermal gradient chemical vapor infiltration, Appl. Phys. Lett. 66 (1995) 2334-2336.

DOI: 10.1063/1.113974

Google Scholar

[2] F.J. Buchanan and J.A. Little, Oxidation protection of carbon-carbon composites using chemical vapour deposition and glaze technology, Corros. Sci. 35 (1993) 1243-1250.

DOI: 10.1016/0010-938x(93)90344-g

Google Scholar

[3] S. Shiro and S. Takeshi, Preparation and high temperature oxidation of SiC compositionally graded graphite coated with HfO2, Carbon. 40 (2002) 2469-2475.

DOI: 10.1016/s0008-6223(02)00159-8

Google Scholar

[4] N.S. Jacobson and D.M. Curry, Oxidation microstructure studies of reinforced carbon/carbon, Carbon. 44 (2006) 1142-1150.

DOI: 10.1016/j.carbon.2005.11.013

Google Scholar

[5] P.H. Vast, Oxidation protection for carbon materials by oxyfluoride phosphate compounds, Ceram. Eng. Sci. Proc. 16 (1995) 1063-1069.

Google Scholar

[6] C.Q. Tong, L.F. Cheng and X.W. Yin, et al., Oxidation behavior of 2D C/SiC composite modified by SiB4 particles in inter-bundle pores, Compos. Sci. Technol. 68 (2008) 602-607.

DOI: 10.1016/j.compscitech.2007.10.016

Google Scholar

[7] N.N. Wang, J.F. Huang and L.Y. Cao, et al., Influence of Temperature on Oxidation Resistance of Carbon/Carbon Composites Modified by a Hydrothermal Treatment, Chin. J. Inorg. Mat. 24 (2009) 948-952.

DOI: 10.3724/sp.j.1077.2009.00948

Google Scholar

[8] J.F. Huang, N.N. Wang and L.Y. Cao, et al., Oxidation behaviour of hydrothermal modified carbon/carbon composites, Mater. Res. Innovations. 14 (2010) 150-153.

DOI: 10.1179/143307510x12639910071593

Google Scholar