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:
Conventional two-layered structure thermal barrier coatings (TBCs) with different pre-oxidelayer thicknesses were produced by EB-PVD onto Ni-based superalloy. The pre-oxide layer with differentthicknesses was formed after vacuum heat treatment for 2 hours and before ceramic deposition by heatingthe bond coat to 1323K in air for different times. It has been found that with pre-oxide layer thicknessincreasing from 1μm to 3.1μm, the growth rate of thermally grown oxide (TGO) increased during thermalcycling test and the thermal cyclic lifetime of TBCs decreased from 730hs to 400hs Two failure modeswere observed for TBCs with different pre-oxide layer thicknesses and different TGO layer growth rates
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1746.pdf
