Chapter 82. Light Weight Ceramic Sandwich Structure from Preceramic Polymers
- Edgar Lara-Curzio and
- Michael J. Readey
Published Online: 26 MAR 2008
Copyright © 2004 The American Ceramic Society
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
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2004
Print ISBN: 9780470051498
Online ISBN: 9780470291184
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.