Oxidation Resistance of C-SiC-TiC-TiB2 Composite

Abstract

Abstract: Oxidation resistance of C-SiC-TiC-TiB₂ composite prepared by in-situ synthesis was conducted from 600 to 1200℃ in air. Both weight gain and
loss occurred by the difference of composition and testing temperature. The weight change essentially depends on the rate of oxidation of carbon and ceramics and the
characteristics of oxidized surface. The composite was hardly oxidized at 600℃. TiB₂ was first oxidized and B₂O₃ liquid formed at 800℃. B₂O₃ and
SiO₂ trend to form a borosilicate glass above 1000℃, which lead to a formation of dense oxide surface. The rate of oxidation was obviously decreased by the appearance
of liquid phase and the formation of dense oxide surface during oxidation. This makes the oxidation mechanism of the composite into blunting oxidation, resulting in
the increase of oxidation resistance.

Key words: carbon/ceramic composite, oxidation resistance

CLC Number:

TF323

XIAO Han-Ning,HUANG Qi-Zhong,YANG Qian-Qin. Oxidation Resistance of C-SiC-TiC-TiB₂ Composite[J]. Journal of Inorganic Materials.

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Oxidation Resistance of C-SiC-TiC-TiB₂ Composite

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