ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The rotating components in the hot sections of land-based gas turbine are exposed tosevere environment during several tens thousand hours at above 1100則 operating temperature. Toprotect such components from high temperature oxidation, an intermediate bond coat is applied,typical of a MCrAlY-type metal alloy. Various processing methods have been studied for bond coatdeposition. This study is concerned with the thermal cyclic behavior of thermal barrier coatings.The MCrAlY bond coatings are deposited by a vacuum plasma, low vacuum plasma and highvelocityoxygen fuel spray on a nickel-based superalloy (GTD-111). Thermal cyclic tests at 1100則in still air for various periods of time were used to evaluate the thermal cyclic resistance of the TBCcoating with the various processing sprayed bond coating layer. The microstructure andmorphology of as-sprayed and of thermal cycled coatings were characterized by scanning electronmicroscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and X-ray diffraction(XRD). The order of thermal cyclic resistance was YSZ-VPS bond coat, YSZ-LVPS and YSZHVOF.The influence of bond coat spray methods on durability of TBCs is discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.631.pdf
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