Oxidation and Strength of Silicon Nitride and Silicon Carbide

  • Johann E. Siebels
Part of the Army Materials Technology Conference Series book series (volume 1)


Ceramic components in a gas turbine have to operate in an oxidizing atmosphere at high temperatures. Nonoxides like Si3N4 and SiC, easily oxidizing materials, have to withstand this attack for long times without changing their characteristics.

The results of laboratory investigations on oxidation resistance and long time stability of Si3N4 and SiC are described. Recent materials show a satisfactory resistance against oxidation. Nevertheless, all materials investigated show changes in strength after annealing. Durability problems of ceramic components may arise from the strength degradation behaviour shown by nearly all materials at certain temperature levels.


Silicon Carbide Silicon Nitride Oxidation Time Driving Cycle Strength Degradation 
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  1. [1]
    P. Walzer, M. Langer, J. Siebels, “Development of Multi-Density Silicon Nitride Turbine Rotors” Proceedings of the 5th Army Material Technology Conference, 1977Google Scholar
  2. [2]
    P. Walzer, J. Siebeis, “Stand der Entwicklung eines Turbinenlaufrades aus einem Siliziumnitrid-Verbund”, Keramische Komponenten für Fahrzeug-Gasturbinen, Springer-Verlag, Berlin; 1978Google Scholar
  3. [3]
    S. W. Freiman, J. J. Mecholsky, W. J. Mc Donough, R. W. Rice, “Effect of Oxidation on the Room Temperature Strength of Hot-Pressed Si3N4-MgO and Si3N4-ZrO2”, Proceedings of the 5th Army Materials Technology Conference, 1977Google Scholar
  4. [4]
    J. Siebels, German patent P 28 22 627. 9Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Johann E. Siebels
    • 1
  1. 1.Research and DevelopmentVolkswagenwerk AGWolfsburgWest Germany

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