Development of a Thermal Transport Database for Air Plasma Sprayed ZrO2 ? Y2O3 Thermal Barrier Coatings

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Journal of Thermal Spray Technology

DOI:https://doi.org/10.1007/s11666-010-9486-z· OSTI ID:988711

Wang, Hsin ^[1]; Dinwiddie, Ralph Barton ^[1]; Porter, Wallace D ^[1]

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1. ORNL

Thermal Diffusivities of Air Plasma Sprayed (APS) thermal barrier coatings (TBCs) are measured by the laser flash method. The data are used to calculate thermal conductivity of TBCs when provided with density and specific heat data. Due to the complicated microstructure and other processing related parameters, thermal diffusivity of TBCs can vary as much as three to four fold. Data collected from over 200 free-standing ZrO2 7-8 wt%Y2O3 TBCs are presented. The large database gives a clear picture of the expected band of thermal diffusivity values. When this band is used as reference for thermal diffusivity of a specific TBC, the thermal transport property of TBC can be more precisely described. The database is intended to serve researchers and manufacturers of TBCs as a valuable source for evaluating their coatings.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 988711
• Journal Information: Journal of Thermal Spray Technology, Journal Name: Journal of Thermal Spray Technology Journal Issue: 5 Vol. 19; ISSN 1059-9630; ISSN 0000-0000
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DENSITY
INFORMATION SYSTEMS
MICROSTRUCTURE
PROTECTIVE COATINGS
SPECIFIC HEAT
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
YTTRIUM OXIDES
ZIRCONIUM OXIDES
thermal diffusivity and thermal barrier coating