Comprehensive damage evaluation of localized spallation of thermal barrier coatings
نویسندگان
چکیده
منابع مشابه
Erosion and Foreign Object Damage of Thermal Barrier Coatings
Thermal barrier coating are perceived as an enabling technology to increase the performance of, improve efficiency within, and lower the emissions from, modern gas turbines. To fully utilise this capability one has to be able to accurately predict the life of these coatings under conditions relevant to gas turbine service. This paper addresses the failure of TBC systems as a result of erosion a...
متن کاملDevelopment of Nondestructive Evaluation Methods for Thermal Barrier Coatings
Nondestructive evaluation (NDE) methods are being developed at Argonne National Laboratory for thermal barrier coatings (TBCs) applied to components in the hot-gas path of advanced high-efficiency and low-emission gas turbines, including syn-gas fired turbines. As TBCs become “prime reliant,” it becomes important to know their conditions nondestructively to assure the reliability of these compo...
متن کاملMicrostructural investigations of EBPVD thermal barrier coatings
This paper deals with the morphology, constitutive phases and fine microstructures of some EBPVD processed yttria partially stabilized zirconia thermal barrier coatings. This study has been performed by X-ray diffraction and scanning and transmission electron microscopy. It was shown that the coatings studied were constituted of a single metastable tetragonal t' phase, as expected if one refers...
متن کاملThermophysical properties of thermal barrier coatings
Thin layers of thermal barrier coating (TBCs) are applied to metallic components of heat engines to reduce metal temperatures and to provide environmental protection. This results in increased engine efficiency and prolonged operational life. Of special current interest is the use of TBCs in aircraft engines. The TBCs, often yttria-stabilized zirconia (YSZ), are deposited on nickel or cobalt-ba...
متن کاملDelamination of multilayer thermal barrier coatings
Multilayer thermal barrier coatings (TBCs) on superalloy substrates are comprised of an intermetallic bond coat, a thermally grown oxide (TGO) layer, and a porous zirconia top coat that provides thermal protection. The TGO attains a thickness of 1±10 lm prior to failure, while the bond coat and zirconia layer are each about 50±100 lm thick. The preferred method for manufacturing TBCs comprises ...
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ژورنال
عنوان ژورنال: Journal of Advanced Ceramics
سال: 2017
ISSN: 2226-4108,2227-8508
DOI: 10.1007/s40145-017-0234-4