期刊
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
卷 22, 期 1, 页码 40-47出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2011.12.007
关键词
Calcium-magnesium-alumino-silicate; Thermal barrier coatings; Plasma spray; Impedance spectroscopy
资金
- New Century Excellent Talents in University (NCET)
- National Nature Science Foundation of China (NSFC) [50771009 50731001]
The yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) prepared by atmospheric plasma spraying with different heat treatment period at the temperature of 1250 degrees C were studied in the present investigation. Electrochemical impedance spectroscopy (EIS) was employed to non-destructively examine the impedance and capacitance behavior of free standing YSZ coatings deposited by plasma spray with CMAS (calcium-magnesium-alumino-silicate) infiltration. Equivalent circuit was established on the basis of the biomodal structure in coatings. The sintering behavior of the coatings can be reflected by the changes of resistance and capacitance of the coating. By EIS, the microstructure evolution of the coating with CMAS deposits was discussed in detail. (C) 2012. Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.
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