Characterization of the adherence of plasma-sprayed ZrO/sub 2/ coatings
Analysis of the microstructure and adherence of ZrO/sub 2/ coatings revealed that the adherence decreased with increasing coating thickness and could be increased by incorporating MgO as a second phase as well as by including noncubic ZrO/sub 2/ in the cubic ZrO/sub 2/ coating. Residual stresses from the plasma spraying process limit adherence (hence the coating thickness dependence) but these can be relieved by plastic flow in the MgO phase during post-spray cooling. Some degree of strength/toughening is also derived by the presence of microcracks and/or from transformation associated with the presence of tetragonal ZrO/sub 2/.
- Research Organization:
- Naval Research Lab., Washington, DC (USA)
- DOE Contract Number:
- AB03-78ET15328
- OSTI ID:
- 6940521
- Report Number(s):
- DOE/ET/15328-T1; ON: DE82008637
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTORS
COAL GASIFICATION
COATINGS
COHERENT SCATTERING
CORROSION PROTECTION
CRYSTAL STRUCTURE
DIFFRACTION
GASIFICATION
MACHINERY
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS TESTING
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SORPTION
SPRAYED COATINGS
STRESSES
SURFACE PROPERTIES
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTORS
COAL GASIFICATION
COATINGS
COHERENT SCATTERING
CORROSION PROTECTION
CRYSTAL STRUCTURE
DIFFRACTION
GASIFICATION
MACHINERY
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS TESTING
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SORPTION
SPRAYED COATINGS
STRESSES
SURFACE PROPERTIES
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES