Journal
SCRIPTA MATERIALIA
Volume 113, Issue -, Pages 71-74Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.09.029
Keywords
Thermal barrier coatings; Air-plasma spray; Buckling; Liquid infiltration; Calcium-magnesium-alumino-silicate
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Funding
- 1000 Plan Program
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [SHDP201303]
- National Natural Science Foundation of China [51271120]
- Key Program for Basic Research of Shanghai Science and Technology Committee [12DJ1400400]
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buckling phenomenon in air-plasma sprayed yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) induced by calcium-magnesium-alumino-silicate (CMAS) attack was investigated. The liquid CMAS infiltration due to capillary force weakened the interface and introduced a significant volume expansion (32%) in the top coat, leading to a large scale buckling of the TBC at high temperature. The dissolution and tetragonalmononiclic phase transformation of YSZ induced by CMAS only has a negligible contribution. (C) 2015 Elsevier Ltd. All rights reserved.
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