The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Improvement of Oxidation Resistance by Coating on C/BN Composites

  • Kim, Dong-Pyo (Dept. of Fine Chem. Eng. and Chemistry, Chungnam Univ) ;
  • Park, Hee-Dong (Dept. of Fine Chem. Eng. and Chemistry, Chungnam Univ) ;
  • Lee, Jae-Do (Inorg. Mater. Div., Korea Res. Inst, of Chemical Technology)
  • Published : 1995.09.01
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Abstract

Borosilicate, $B_2O_3$ and BN derived from liquid precursors have been tested as shielding materials for the long period of oxidation resistance of C/BN composites at $650^{\circ}C$. Borosilicate coating displayed excellent oxidation resistance and low moisture absorbance, while $B_2O_3$ and BN were less effective in elevating the oxidation resistance. The enhancement of the oxidation resistance was explained as self-healing effect by viscous flow of the borosilicate glass over Tg, resulting in the reduction of the exposed carbon fibers in a BN matrix.

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References

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