Email RIS file
Bookmark
Report an Issue

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

Availability

I Want It
I Want It

Finding items...

Restrictions on Access:
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
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