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Optimizing Compliance and Thermal Conductivity of Plasma Sprayed Thermal Barrier Coatings via Controlled Powders and Processing Strategies

Tan, Yang and Srinivasan, Vasudevan and Nakamura, Toshio and Sampath, Sanjay and Bertrand, Pierre and Bertrand, Ghislaine Optimizing Compliance and Thermal Conductivity of Plasma Sprayed Thermal Barrier Coatings via Controlled Powders and Processing Strategies. (2012) Journal of Thermal Spray Technology, 21 (5). 950-962. ISSN 1059-9630

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Official URL: http://dx.doi.org/10.1007/s11666-012-9780-z

Abstract

The properties and performance of plasma-sprayed thermal barrier coatings (TBCs) are strongly dependent on the microstructural defects, which are affected by starting powder morphology and processing conditions. Of particular interest is the use of hollow powders which not only allow for efficient melting of zirconia ceramics but also produce lower conductivity and more compliant coatings. Typical industrial hollow spray powders have an assortment of densities resulting in masking potential advantages of the hollow morphology. In this study, we have conducted process mapping strategies using a novel uniform shell thickness hollow powder to control the defect microstructure and properties. Correlations among coating properties, microstructure, and processing reveal feasibility to produce highly compliant and low conductivity TBC through a combination of optimized feedstock and processing conditions. The results are presented through the framework of process maps establishing correlations among process, microstructure, and properties and providing opportunities for optimization of TBCs.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://link.springer.com The original PDF of the article can be found at Springer website : http://link.springer.com/article/10.1007%2Fs11666-012-9780-z
HAL Id:hal-01178708
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Université de Technologie de Belfort-Montbéliard - UTBM (FRANCE)
Other partners > Stony Brook University (USA)
Laboratory name:
Funders:
National Science FoundationIndustrial Consortium for Thermal Spray Technology
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Deposited By: cirimat webmestre
Deposited On:20 Jul 2015 14:52

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