Anisotropic elastic properties of thermal spray coatings determined via resonant ultrasound spectroscopy

It is difficult to determine the elastic properties of thermal-sprayed ceramic and metallic coatings owing to the microstructural complexity, sample size and geometry, heterogeneity and availability of suitable techniques. Furthermore, the splat-based build-up of the coating results in transverse an...

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Bibliographic Details
Published inActa materialia Vol. 58; no. 16; pp. 5305 - 5315
Main Authors Tan, Y., Shyam, A., Choi, W.B., Lara-Curzio, E., Sampath, S.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.09.2010
Elsevier
Subjects
Accumulation
ANISOTROPY
Applied sciences
CERAMICS
COATINGS
DEFECTS
DESIGN
Elastic constants
Elastic properties
ELASTICITY
Exact sciences and technology
Heterogeneity
MATERIALS SCIENCE
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
MICROSTRUCTURE
NICKEL
Nonmetallic coatings
Plasma spraying
Production techniques
SPECTROSCOPY
SPRAY COATING
Surface treatment
Thermal barrier coatings
Thermal spray
Ultrasound
Young s modulus
Yttria stabilized zirconia
Thermal barrier coatings
Nickel
Elastic properties
Plasma spraying
Thermal spray
Plasma
Ultrasonic spectrometry
Hot spraying
Mechanical properties
Non metal coating
Thermal barrier
Spray coating
Surface treatment
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Summary:It is difficult to determine the elastic properties of thermal-sprayed ceramic and metallic coatings owing to the microstructural complexity, sample size and geometry, heterogeneity and availability of suitable techniques. Furthermore, the splat-based build-up of the coating results in transverse anisotropy in the elastic properties. This work reports on such anisotropic elastic properties of these coatings determined by resonant ultrasound spectroscopy. This approach, along with the analysis presented, enables the elastic properties to be determined for the first time as a function of direction and temperature, essential information for design. Coating systems investigated include plasma-sprayed yttria stabilized zirconia and nickel. An additional nickel coating deposited by the high-velocity oxygen-fuel process was also investigated and compared with the plasma-sprayed coating. Average Young’s moduli of the coatings were independently measured by indentation. The elastic properties determined enabled the coating microstructure–elastic property relationships to be described.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
DE-AC05-00OR22725
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2010.06.003