High temperature materials for energy
generation
Yasser Gowayed
Department of Polymer & Fiber Engineering
gowayed@auburn.edu
November 2014
Temperature requirements for turbine engines
Pratt & Whitney: Public Domain as defined by ITAR 22 C.F.R. Chapter I, Subchapter M, Part 120.11
Temperature requirements for nuclear reactors
S. R. Greene, et al., ORNL/TM-2010/199
Benefits of high temperature
• Turbine engines
• Less cooling requirements
• Improved efficiency
• Reduced fuel burn and
emissions
• Higher speed
• Reduced weight
• High power density (high
temperature and pressure)
• Nuclear reactors
• Superior economics
• Limit severe accidents
• Higher thermal efficiency
and process heat
• Better non-proliferation
and waste characteristics
Ceramic matrix composites
Wadley, et al., 2013
Current activities in industry
GE aviation built two facilities in DE and NC
(opened last month) to embed ceramic
composites in CFM’s LEAP turbofan engines:
2016 for the Airbus A320neo
2017 for the Boeing 737max
http://www.geglobalresearch.com/innovation/ceramic-matrix-composites-improve-engine-efficiency
http:// phys.org
Long research experience at AU
• Fiber architecture
• Microstructural analysis
• Porosity
• Processing parameters
• NDE
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Thermal diffusivity
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Acoustic Emission
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Microwave
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CT and mCT
• Mechanical and Thermal • Damage
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Yasser Gowayed
November 2014
Micro-level stresses
Crack initiation
Damage progression
Effect of porosity
Oxidation
Fatigue
Creep
Yasser Gowayed and Larry Barowski
Challenges
• Manufacturing
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Large parts
Joining
Porosity
Cracks
Environmental barrier coatings
Cost
Production speed
• Materials
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Hybrid materials
Interface compatibility
Effect of radiation
Corrosion, oxidation
Fatigue, creep
Hermiticity
Yasser Gowayed
November 2014
• Mass production
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Production flow
Human interface
Impact on environment
Waste
Time constraints
Automation
• Business and life
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Economics
Ethics
Effect of speed
Noise levels
safety
Current sources of research funding
Government agencies
Aerospace industry
Yasser Gowayed
November 2014
Multidisciplinary research group at AU
• College of Engineering
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Polymer and Fiber
Mechanical
Materials
Industrial
Chemical
Aerospace
• College of Business
• School of Industrial + Graphic Design
• College of Science and Math
• College of Liberal arts
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Economics
Philosophy
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Chemistry & Biochemistry
Mathematics & Statistics
Physics
• School of kinesiology