Chapter 82. Light Weight Ceramic Sandwich Structure from Preceramic Polymers

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. Thomas Hoefner,
  2. Juergen Zeschky,
  3. Michael Scheffler and
  4. Peter Greil

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291184.ch82

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

How to Cite

Hoefner, T., Zeschky, J., Scheffler, M. and Greil, P. (2004) Light Weight Ceramic Sandwich Structure from Preceramic Polymers, in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291184.ch82

Author Information

  1. University of Erlangen-Nuremberg Department of Materials Science, Glass and Ceramics Martensstrasse 5 91058 Erlangen, Germany

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2004

ISBN Information

Print ISBN: 9780470051498

Online ISBN: 9780470291184

SEARCH

Keywords:

  • Si-O-C;
  • MTMS;
  • CCD;
  • SMI;
  • CTE

Summary

Light weight ceramic sandwich structures with a foam core and surface cover tapes were manufactured from filler loaded preceramic polymer systems.

A poly (silsesquioxane) loaded with 58 wt.-% of a mixture of Si and SiC filler powders was tape cast. A polymer-filler blend with 65 wt.-% of the same filler composition was in situ foamed between two green tapes by a controlled heat treatment (blowing, curing and stabilization) at 270 °C. the sandwich element was subsequently pyrolyzed at 1000 °C in nitrogen atmosphere to form a Si-O-C micro composite material.

The microstructure and the mechanical properties of the sandwich structure were characterized. the interface strength between the foam core and the cover tape was controlled by varying the filler load of the foam, which effects the dimensional change misfit upon pyrolysis and thermal contraction. the foam of the sandwich structure exhibits a Weibull modulus m = 13 (tension) and m = 8 (compression) and a crushing strength exceeding 4 MPa at a fractional density of 0.27.