ISSN:
1662-9752
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:
10mol% Nd2O3 and Yb2O3 co-doped YSZ thermal barrier coatings were produced byelectron beam physical vapor deposition (EB-PVD). Compared to the traditional YSZ coating, thedeposited coating has shown tree-like microstructure in each column. Due to this, the co-dopedcoating is more porous than the YSZ coating. The microstructure evolution of the coating during hightemperature exposure at 1373 K was studied. The tree-like microstructure disappeared due to joiningof sub-grains during sintering. Thermal growth oxide (TGO) grew quickly at the first few hours andthen the growth of TGO became slow in the subsequent high temperature exposure. Cracks generatedand propagated in the ceramic top coat and along the interface of the top coat and TGO layer. Finally,the coalescence of such cracks resulted in failure of the TBCs
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1735.pdf