NDLI: Elastic and Anelastic Behavior of TBCs Sprayed at High-Deposition Rates

Content Provider	Springer Nature Link
Author	Valarezo, A. Dwivedi, G. Sampath, S. Musalek, R. Matejicek, J.
Copyright Year	2014
Abstract	Coatings sprayed at high-deposition rates often result in stiff, dense, and highly stressed coatings. The high deposition temperature at which the coatings are formed is responsible for these characteristics. In this paper, TBCs were sprayed at high-deposition rates, increasing the tensile quenching stresses beyond the threshold of crack opening during spraying. Dense structures were observed within a pass, in the presence of micro and macro defects specifically horizontal cracks within interpasses and vertical segmentation cracks. Mechanical properties, mainly the elastic and anelastic behavior of TBCs were significantly affected by the strain accommodation and friction occurring within intersplats and interpass interfaces. The strain tolerance obtained in as-sprayed conditions decreased as the microstructure and defects sintered during high-temperature heat cycles. The non-linearity degree decreased while the elastic modulus of the various coatings increased to a maximum value.
Starting Page	160
Ending Page	167
Page Count	8
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	24
Issue Number	1-2
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2014-10-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	dense vertically cracked coating elastic modulus in-situ monitoring mechanical properties quenching stress thermal barrier coatings (TBCs) triplex system Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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