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Structure evolution of ZrB2–SiC during the oxidation in air

Published online by Cambridge University Press:  31 January 2011

Xing-Hong Zhang ,
Ping Hu  and
Jie-Cai Han
Xing-Hong Zhang*
Affiliation:
Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Ping Hu*
Affiliation:
Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Jie-Cai Han
Affiliation:
Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
*
Address all correspondence to these authors.a)e-mail: [email protected]b)e-mail: [email protected]
Address all correspondence to these authors.a)e-mail: [email protected]b)e-mail: [email protected]
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Abstract

The structure evolution and oxidation behavior of ZrB2–SiC composites in air from room temperature to ultrahigh temperature were investigated using furnace testing, arc jet testing, and thermal gravimetric analysis (TGA). The oxide structure changed with the increasing temperature. SiC content has no apparent influence on the evolution of structure during the oxidation of ZrB2–SiC below 1600 °C. However, the evolution of structure for ZrB2–SiC above 1800 °C was significantly affected by the SiC content. The formation of the SiC depleted layer in the ZrB2–SiC system not only depends on the surrounding conditions of pressure and temperature but also on the structure distribution of the SiC in the ZrB2 matrix. The apparent recrystallization of the ZrO2 occurred above 1800 °C. The SiC content should be controlled at ∼16% in the ZrB2–SiC system for the ultrahigh-temperature application. The mechanisms of the structure evolution during oxidation in air were also analyzed.

Keywords

Oxidation
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 7 , July 2008 , pp. 1961 - 1972
Copyright
Copyright © Materials Research Society 2008

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References

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