ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Thermal barrier coatings(TBCs) are used in high temperature gas turbines to reduce the surfacetemperature of cooled metal parts such as turbine blades[1]. TBC consist of a bondcoat (e.g.MCrAlY where M is Co, Ni, CoNi, etc.) and a partially stabilized zirconia ceramic topcoat.Usually, the MCrAlY bondcoat is applied by LPPS (low pressure plasma spray) or HVOF(highvelocity oxi-fuel spray). The topcoat is applied by APS (atmospheric plasma splay) or EB-PVD(electron beam-physical vapor deposition). High temperature oxidation properties, thermal barrierproperties and durability of TBC are very important to increase the reliability in high temperatureservice. In this study, new TBC has been investigated. The new TBC consists of a two-layeredbondcoat (LPPS-MCrAlY plus dense PVD overlay MCrAlY) and the EB-PVD type YSZ columnarstructure topcoat. As a result of evaluation tests, it was confirmed that the new TBC had betteroxidation properties and durability than a conventional TBC system
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.522-523.247.pdf
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