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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1430 (October) (2014)  >  pp.889-894

Journal of the Ceramic Society of Japan
<<Previous article Vol.122  No.1430 (October) (2014)   pp.889 - 894 Next article>>

Reaction of CVD BN ceramics in water vapor at 1023–1173 K using different kinetic model

Wang GUANGWEI1) 2), Liu YANXIANG1) 2), Zhang JIANLIANG1) 2), Chou KUO-CHIH1) 2), Hou XINMEI1) 2)
1) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing 2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

The reaction behavior of chemically vapor-deposited BN ceramics in wet air was investigated. The results showed that the oxidation reaction occurred simultaneously with the volatile reaction. The long-term degradation rate of BN was determined by the volatilization reaction of B2O3 with H2O. The reaction kinetics was discussed using different kinetic models, i.e. the paralinear kinetic model and RPP model. Although both models could be adopted to fit the experimental data, RPP model was preferred because the model not only gave an explicit expression of the reaction fraction as the function of all parameters that would be convenient for theoretical discussion, but also it would perform a simple calculation.


Keyword:
BN ceramics, Corrosion test, Thermogravimetric analysis, Model

Received: June 11, 2014
Accepted: July 22, 2014 , Published online: October 01, 2014

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