MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol.435, pp.212-220, 2006 (SCI-Expanded)
Article / Article
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Science Citation Index Expanded (SCI-EXPANDED), Scopus
thermal barrier coatings, zirconia, thermal properties, mechanical properties, yttria-stabilized zirconia, BARRIER COATINGS, MICROSTRUCTURAL CHARACTERIZATION, ZIRCONIA, DEPOSITS, YSZ, EVOLUTION, BEHAVIOR
Middle East Technical University Affiliated:
The effects of starting powder morphology on the thermal and mechanical properties of stand-alone plasma-sprayed 7 wt.% Y2O3-ZrO2 (YSZ) coatings were studied. Two powder morphologies were investigated: an agglomerated and sintered powder (referred to presently as "AS") and a powder manufactured using plasma spheroidization to create hollow spheres (referred to presently as "HS"). Coatings made from AS powders contained 0.21 wt.% SiO2 impurity, twice as much as observed in coatings made from HS powders. Properties of coatings made from each powder type were compared in the as-sprayed state and after 50 h heat treatments at temperatures ranging from 1000 to 1400 degrees C.