Effect of initial powder morphology on thermal and mechanical properties of stand-alone plasma-sprayed 7 wt.% Y2O3-ZrO2 coatings

Ercan B., Bowman K. J., Trice R. W., Wang H., Porter W.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, cilt.435, ss.212-220, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 435
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.msea.2006.07.085
  • Dergi Adı: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.212-220
  • Anahtar Kelimeler: thermal barrier coatings, zirconia, thermal properties, mechanical properties, yttria-stabilized zirconia, BARRIER COATINGS, MICROSTRUCTURAL CHARACTERIZATION, ZIRCONIA, DEPOSITS, YSZ, EVOLUTION, BEHAVIOR
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

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.