Journal
ACTA MATERIALIA
Volume 89, Issue -, Pages 396-407Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.01.038
Keywords
Thermal barrier coating; Delamination; CMAS; Thermal gradient; Infiltration
Funding
- Office of Naval Research [N00014-08-1-0522]
- NSF-DMR [1105672]
- NSF MRSEC Program [DMR 1121053]
- NSF-funded Materials Research Facilities Network
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1105672] Funding Source: National Science Foundation
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This paper examines the effect of temperature gradients on the interaction between silicate deposits and thermal barrier coating (TBC) systems. A dedicated test facility, in which a CO2 laser is employed to impose a controllable thermal gradient through the coating and underlying substrate, is used to investigate the interaction between two silicate compositions with state-of-the-art 7YSZ EB-PVD TBCs. The experimental results are then used to guide the development of expressions that describe the nature of silicate infiltration in the TBCs, the evolution of coating elastic modulus, and the generation and release of stresses. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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