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G14: Advanced CMCs: Processing, Evaluation, and Applications

 

The transition of ceramic matrix composites (CMCs) from laboratory to commercial use in hot sections of turbine engines has just begun.  They are allowing significant advances in efficiency, and their use is expected to increase rapidly.  Refinements in the performance and manufacturing of current composite systems will be aggressively pursued.  There are opportunities for substantial improvements in fibers, matrices, and interface treatments.  Improvements in high temperature stability and creep resistance of Si-based fibers, and creep resistance and resistance to volatilization in steam of oxide fibers will be of great benefit. A higher temperature performing ceramic fiber >1480⁰C may improve the long term performance of CMCs. Additionally chemically resistant interphase chemistries are sought for both types of CMCs.  Finally, improvements in matrices are required for improved interlaminar properties, and improved environmental barrier coatings are needed to protect the matrix from steam under oxidizing conditions.

 

This international symposium will bring together scientists and technologists working on advanced ceramic fibers, interphases, and ceramic matrix composites to discuss and share ideas on advances in the development of ceramic matrix composites and their performance at high temperatures.

 

 

Proposed Session Topics:

  • New developments in high temperature oxide and non-oxide ceramic fibers
  • CMCs processing and fabrication methods
  • Temperature-dependent mechanical properties
  • Extreme environmental effects of fibers and CMCs (oxidation and moisture effects)
  • Ceramic matrix composites interphases (Oxide and non-oxide interphases)
  • Environmental protective coatings
  • Ultrahigh temperature ceramics matrix composites
  • Stress rupture, creep, fatigue, crack growth
  • Modeling and damage mechanics
  • NDE characterization methods

 

Organizers:

  • Emmanuel E. Boakye, UES/AFRL Wright-Patterson AFB, USA, boakye.ctr@us.af.mil
  • Dietmar Koch, German Aerospace Center, Germany, dietmar.koch@dlr.de
  • Yutai Katoh, Oak Ridge National Laboratory, USA
  • Ronald Kerans, University of Dayton/ AFRL Wright-Patterson AFB, USA
  • Kang N Lee, NASA Glenn Research Center, USA
  • Shaoming Dong, Shanghai Institute of Ceramics, China
  • Xiaowei Yin, Northwestern Polytechnical University, China
  • Toshihiro Ishikawa, Tokyo University of Science, Yamaguchi, Japan
  • Jacques Lamon, CNRS – LMTENS, France

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