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Optimizing Nonlinear Properties of Thermal Sprayed Coatings through Processing Parameters

Published online by Cambridge University Press:  26 February 2011

Yajie Liu ,
Toshio Nakamura ,
Vasudevan Srinivasan ,
Andrew Gouldstone  and
Sanjay Sampath
Yajie Liu
Affiliation:
[email protected], State University of New York at Stony Brook, Mechanical Engineering, 006 Light Engineering, Department of Mechanical Engineering, Stony Brook, NY, 11790, United States
Toshio Nakamura
Affiliation:
[email protected], State University of New York, Mechanical Engineering, Stony Brook, NY, 11794, United States
Vasudevan Srinivasan
Affiliation:
[email protected], State University of New York, Materials Science and Engineering, Stony Brook, NY, 11794, United States
Andrew Gouldstone
Affiliation:
[email protected], State University of New York, Materials Science and Engineering, Stony Brook, NY, 11794, United States
Sanjay Sampath
Affiliation:
[email protected], State University of New York, Materials Science and Engineering, Stony Brook, NY, 11794, United States
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Abstract

Low-temperature thermal cycling of plasma sprayed zirconia coatings via curvature measurements is used to quantify their nonlinear mechanical behavior. The nonlinear feature arises from the unique layered, porous and cracked morphology of thermal sprayed ceramic materials. With this procedure, various specimens were tested to investigate the effects of processing condition. The measured nonlinear properties are interpreted in the context of microstructural changes in the plasma sprayed coatings due to differences in particle state upon impact and coating build-up. The implications of this study are significant for thermo-mechanical design of strain-tolerant ceramic coatings in thermal barrier applications.

Keywords

plasma depositioncoatingZr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 977: Symposium FF – Processing-Structure-Mechanical Property Relations in Composite Materials , 2006 , 977-FF14-01
Copyright
Copyright © Materials Research Society 2007

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