Chapter 65. Oxidation and Hot Corrosion of Dupont Lanxide Enhanced SiC/SiC and Hitco SiC/C Composites

  1. J. P. Singh
  1. George Y. Richardson and
  2. Robert W. Kowalik

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch65

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

How to Cite

Richardson, G. Y. and Kowalik, R. W. (1997) Oxidation and Hot Corrosion of Dupont Lanxide Enhanced SiC/SiC and Hitco SiC/C Composites, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch65

Author Information

  1. Naval Air Warfare Center, Patuxent River, MD

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375495

Online ISBN: 9780470294437

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Keywords:

  • hot corrosion;
  • composite degradation;
  • high temperature testing;
  • microstructural analysis;
  • x-ray diffraction

Summary

A hot corrosion and oxidation study of SiC/SiC and SiC/C composites was conducted to examine environmentally induced interactions with the fiber and matrix and to assess the composite degradation in the simulated molten salt environment of a naval aircraft gas turbine engine. High temperature testing included both static and cyclic thermal exposures to 900°C in air for time intervals from 1 to 1000 hours. Composites were tested both as received and coated with a layer (0.5–1.0 mg/cc) of sodium sulfate. Microstructural analysis and weight change measurements were used to examine the degradation of the exposed composites and phase identification was performed with X-ray diffraction assisted by chemical analysis via Energy Dispersive X-ray Spectroscopy (EDS). Phase evolution and transformations were determined in-situ with the aid of a high temperature x-ray diffractometer. Degradation of these composites, being investigated for navy propulsion applications are characterized.