Chapter 65. Environmental Effects on the Mechanical Properties of SiC-Based Hot Gas Cleaning Filters
- Todd Jessen and
- Ersan Ustundag
Published Online: 28 MAR 2008
Copyright © 2000 The American Ceramic Society
24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4
How to Cite
Pastila, P. H., Nikkilä, A.-P. and Mäntylä, T. A. (2000) Environmental Effects on the Mechanical Properties of SiC-Based Hot Gas Cleaning Filters, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch65
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 2000
Print ISBN: 9780470375693
Online ISBN: 9780470294635
- coal fueled power;
- creep properties;
- degradation mechanism;
- non etched samples.
Ceramic hot gas cleaning filters are mainly used at advanced coal-fueled power generation systems to clean the fuel gas. The aggressive process environment is known to cause microstructural changes in all common ceramic hot gas filter materials during operation. In this work laboratory scale exposures to high temperature, steam and alkalis were made for several commercial SiC- based hot gas filters. The changes in microstructure were studied as well as strength and creep properties were tested.
According to the results significant crystallization of the binder phase had occurred. SEM investigation suggests also oxidation of SiC. The loss of strength due to the exposure was observed and also some changes in creep properties. The details of microstructural changes and their effect on mechanical properties are discussed.