Effects of variations in structure on the performance of thermal barrier coatings. Project Report No. 87

Technical Report · Mon May 05 00:00:00 EDT 1980

OSTI ID:6617444

Price, M O; Taylor, T A

A program was initiated to evaluate the thermomechanical stability of plasma-deposited thermal barrier systems of the two-layer (duplex) type with an oxide outer layer and MCrAlY undercoat. Two oxides were included: MgO.ZrO/sub 2/ and ZrO/sub 2/.20 wt % Y/sub 2/O/sub 3/. Effects of oxide density and layer thickness were investigated. A CoNiCrAlY undercoat was used on all test specimens. Advantages of an intermediate layer of Cr or Ni-Cr were evaluated. Twenty-two combinations of intermediate layer composition and oxide composition, density, and thickness were evaluated. The work described includes specimen preparation thermal fatigue and oxidation test procedures, test results, metallurgical, microprobe and x-ray analyses. 25 figures, 14 tables.

• Research Organization: Union Carbide Corp., Indianapolis, IN (USA). Linde Div.
• DOE Contract Number: AC03-78ET13327
• OSTI ID: 6617444
• Report Number(s): DOE/ET/13327-T3; ON: DE83003021
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNESIUM OXIDES
PROTECTIVE COATINGS
PERFORMANCE TESTING
TURBINE BLADES
YTTRIUM OXIDES
ZIRCONIUM OXIDES
CHROMIUM
CHROMIUM ALLOYS
GAS TURBINES
LAYERS
METALLOGRAPHY
MICROSTRUCTURE
NICKEL ALLOYS
OXIDATION
THERMAL FATIGUE
THERMAL INSULATION
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELEMENTS
FATIGUE
MACHINERY
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
METALS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TURBINES
TURBOMACHINERY
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360205* - Ceramics
Cermets
& Refractories- Corrosion & Erosion