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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 5: 948 - 952

DOI: https://doi.org/10.3724/SP.J.1077.2009.00948

Research Paper

Influence of Temperature on Oxidation Resistance of Carbon/Carbon
Composites Modified by a Hydrothermal Treatment

  • WANG Ni-Na ,
  • HUANG Jian-Feng ,
  • CAO Li-Yun ,
  • WU Jian-Peng
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  • (Key Laboratory of Auxiliary Chemistry & Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an 710021, China)

Received date: 2009-01-14

  Revised date: 2009-03-02

  Online published: 2009-09-20

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Abstract

Carbon/carbon (C/C) composites are one of the most important high temperature structure materials; Which are oxidized remarkably above 400℃ in oxidative atmosphere. In order to improve the oxidation resistance of C/C composites, suspension mixtures prepared by mixing B4C, SiC and Al2O3 powders and phosphoric acid solution were used as precursors to modify the C/C composites by a novel hydrothermal treatment. The influences of the hydrothermal treatment temperature on the phase, microstructure and antioxidation property of the as-modified composites were investigated. The asmodified C/C composites were characterized by X-ray diffraction, scanning electron microscope (SEM), energy dispersive spectroscope (PDS) and X-ray photoelectron spectroscopy (XPS) techniques. Results show that the surface of the C/C composites is covered by a coating composed of molten B2O3, HPO3 and microcrystalline Al(PO3)3 after modified by the hydrothermal treatment, and their oxidation resistance is effectively improved in the temperature range from 120℃ to 200℃. The anti-oxidation property of the treated C/C composites is improved with increasing hydrothermal treatment temperature. The mass of the modified C/C composites losses only 2.31% after oxidized at 700℃ in air for 10h.

Key words： carbon/carbon composites; oxidation; hydrothermal; matrix modification

Cite this article

WANG Ni-Na , HUANG Jian-Feng , CAO Li-Yun , WU Jian-Peng . Influence of Temperature on Oxidation Resistance of Carbon/Carbon
Composites Modified by a Hydrothermal Treatment[J]. Journal of Inorganic Materials, 2009 , 24(5) : 948 -952 . DOI: 10.3724/SP.J.1077.2009.00948

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