Effect of the sintering additive content on the protective passive oxidation behaviour of pressureless liquid-phase-sintered SiC

作者: Fernando Rodríguez-Rojas , Angel L. Ortiz , Oscar Borrero-López , Fernando Guiberteau

DOI: 10.1016/J.JEURCERAMSOC.2012.05.004

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摘要: Abstract The long-term oxidation behaviour in air of pressureless liquid-phase-sintered SiC was investigated as a function the sintering-additive content (a mixture Y2O3 and Al2O3 3:5 molar ratio) at oxidizing temperatures interval 1100–1300 °C. It is shown that under these mild conditions always passive, with formation protective oxide scales. However, kinetics cannot be described appropriately by parabolic-rate law. Instead, due to gradual crystallization scales during oxidation, it more complex, exhibiting two different stretches given respectively arctan- laws. Furthermore, found rate-limiting mechanism initial arctan outward diffusion metal cations from secondary intergranular phase into scale, activation energy being very high decreasing 545 432 kJ/mol increasing 5 20 wt%. subsequent parabolic however inward oxygen through multicomponent lower than before also 345 205 kJ/mol increases resistance decreases content, but while decrease moderate up 10 wt%, marked for greater contents.

参考文章(34)
J. W. Hinze, W. C. Tripp, H. C. Graham, The High-Temperature Oxidation of Hot-Pressed Silicon Carbide Springer, Boston, MA. pp. 409- 419 ,(1975) , 10.1007/978-1-4684-3150-6_27
Klaus G. Nickel, Corrosion of advanced ceramics : measurement and modelling Kluwer Academic. ,(1994)
R. J. Fordham, High temperature corrosion of technical ceramics Elsevier Applied Science. ,(1990)
SUNG CHUL PARK, KURN CHO, JONG JIP KIM, Oxidation of hot-pressed silicon carbide in the cyclic and static conditions Journal of Materials Science Letters. ,vol. 17, pp. 23- 25 ,(1998) , 10.1023/A:1006581321821
F. Rodríguez-Rojas, A.L. Ortiz, F. Guiberteau, M. Nygren, Anomalous oxidation behaviour of pressureless liquid-phase-sintered SiC Journal of The European Ceramic Society. ,vol. 31, pp. 2393- 2400 ,(2011) , 10.1016/J.JEURCERAMSOC.2011.05.015
L.-O. Nordberg, Per Olov Käll, Mats Nygren, A Mathematical Analysis of the Non-Parabolic Oxidation Behaviour of α-Sialon Matrices and Composites Key Engineering Materials. ,vol. 113, pp. 39- 48 ,(1995) , 10.4028/WWW.SCIENTIFIC.NET/KEM.113.39
F. Rodríguez-Rojas, A.L. Ortiz, O. Borrero-López, F. Guiberteau, Effect of Ar or N2 sintering atmosphere on the high-temperature oxidation behaviour of pressureless liquid-phase-sintered α-SiC in air Journal of The European Ceramic Society. ,vol. 30, pp. 119- 128 ,(2010) , 10.1016/J.JEURCERAMSOC.2009.08.004
Jeanette Persson, Mats Nygren, The oxidation kinetics of β-sialon ceramics Journal of the European Ceramic Society. ,vol. 13, pp. 467- 484 ,(1994) , 10.1016/0955-2219(94)90026-4
Shuqi Guo, Naoto Hirosaki, Hidehiko Tanaka, Yoshinobu Yamamoto, Toshiyuki Nishimura, Oxidation behavior of liquid-phase sintered SiC with AlN and Er2O3 additives between 1200 °C and 1400 °C Journal of The European Ceramic Society. ,vol. 23, pp. 2023- 2029 ,(2003) , 10.1016/S0955-2219(03)00030-X
Heon-Jin Choi, June-Gunn Lee, Young-Wook Kim, Oxidation Behavior of Liquid‐Phase Sintered Silicon Carbide with Aluminum Nitride and Rare‐Earth Oxides (Re2O3, where Re = Y, Er, Yb) Journal of the American Ceramic Society. ,vol. 85, pp. 2281- 2286 ,(2002) , 10.1111/J.1151-2916.2002.TB00448.X