High Temperature Mechanical Properties of Si-B-C-N Precursor-Derived Amorphous Ceramics

  1. Prof. Dr. G. Müller
  1. Martin Christ1,2,
  2. Martin Günter1,2,
  3. Joachim Bill1,2 and
  4. Fritz Aldinger1,2

Published Online: 27 APR 2006

DOI: 10.1002/3527607293.ch59

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

How to Cite

Christ, M., Günter, M., Bill, J. and Aldinger, F. (2000) High Temperature Mechanical Properties of Si-B-C-N Precursor-Derived Amorphous Ceramics, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch59

Editor Information

  1. Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany

Author Information

  1. 1

    Max-Planck-Institut für Metallforschung, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstrasse 5, 70569 Stuttgart, Germany

  2. 2

    Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstrasse 5, 70569 Stuttgart, Germany

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301942

Online ISBN: 9783527607297

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Keywords:

  • Si-B-C-N amorphous ceramics;
  • high temperature mechanical properties;
  • deformation behavior

Summary

The high temperature mechanical properties of Si-B-C-N amorphous ceramics and their characterization by isothermal compression creep tests in the temperature range between 1350 °C and 1500 °C and at stresses up to 300 MPa are reported. The deformation rate was found to be composed of two components. One is proportional and the other one independent on the applied stress. The stress-dependent component is supposed to be due to viscous flow and the stress independent one to thermal activated shrinkage. The deformation behavior can be described by the free volume model developed for metallic glasses. According to this model, an activation energy Qf = 0.6 MJ/mol for the movement and production/annihilation of flow defects was found. In the initial period of the creep tests some anelastic behavior was observed.