Actions for Thermal Conductivity of EB-PVD Thermal Barrier Coatings Evaluated by a Steady-State Laser Heat Flux Technique

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Thermal Conductivity of EB-PVD Thermal Barrier Coatings Evaluated by a Steady-State Laser Heat Flux Technique

Author
Zhu, Dongming
Published
July 2000.
Physical Description
1 electronic document
Additional Creators
Bruce, Robert W., Miller, Robert A., and Nagaraj, Ben A.
Online Version

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Summary
The thermal conductivity of electron beam-physical vapor deposited (EB-PVD) Zr02-8wt%Y2O3 thermal barrier coatings was determined by a steady-state heat flux laser technique. Thermal conductivity change kinetics of the EB-PVD ceramic coatings were also obtained in real time, at high temperatures, under the laser high heat flux, long term test conditions. The thermal conductivity increase due to micro-pore sintering and the decrease due to coating micro-delaminations in the EB-PVD coatings were evaluated for grooved and non-grooved EB-PVD coating systems under isothermal and thermal cycling conditions. The coating failure modes under the high heat flux test conditions were also investigated. The test technique provides a viable means for obtaining coating thermal conductivity data for use in design, development, and life prediction for engine applications.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20000088491.
NASA/TM-2000-210238.
E-12357.
NAS 1.15:210238.
Metallurgical Coatings and Thin Films; 10-14 Apr. 2000; San Diego, CA; United States.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15640672