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Thermal Conductivity and Sintering Behavior of Advanced Thermal Barrier CoatingsAdvanced thermal barrier coatings, having significantly reduced long-term thermal conductivities, are being developed using an approach that emphasizes real-time monitoring of thermal conductivity under conditions that are engine-like in terms of temperatures and heat fluxes. This is in contrast to the traditional approach where coatings are initially optimized in terms of furnace and burner rig durability with subsequent measurement in the as-processed or furnace-sintered condition. The present work establishes a laser high-heat-flux test as the basis for evaluating advanced plasma-sprayed and physical vapor-deposited thermal barrier coatings under the NASA Ultra Efficient Engine Technology (UEET) Program. The candidate coating materials for this program are novel thermal barrier coatings that are found to have significantly reduced thermal conductivities due to an oxide-defect-cluster design. Critical issues for designing advanced low conductivity coatings with improved coating durability are also discussed.
Document ID
20020061255
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Zhu, Dongming (Ohio Aerospace Inst. Brook Park, OH United States)
Miller, Robert A. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
May 2, 2002
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA/TM-2002-211481
E-13249
NAS 1.15:211481
Meeting Information
Meeting: 26th Annual International Conference on Advanced Ceramics and Composites
Location: Cocoa Beach, FL
Country: United States
Start Date: January 13, 2002
End Date: January 18, 2002
Sponsors: American Ceramic Society
Funding Number(s)
PROJECT: RTOP 714-04-20
Distribution Limits
Public
Copyright
Public Use Permitted.

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