ZrO 2-(2-8mol%)Y 2O 3 coatings were deposited on zirconia substrates by EB-PVD. The coated layer had a columnar microstructure with intercolumnar gaps between columnar grains. Nanosized pores could be observed around feather-like grains as well as inside the columnar grains. The main phase of all coated specimens was the tetragonal phase. However, the monoclinic and cubic phase of the second phase could be detected for ZrO 2-2mol%Y 2O 3 coatings and ZrO 2-(6-8mol%)Y 2O 3 coatings, respectively. The thermal conductivity of coatings was successfully evaluated with the pulsed thermal imaging method using a combined sample of coatings and a substrate. Both the thermal conductivity and heat capacity of Y 2O 3-doped ZrO 2 coatings tended to decrease with increasing amounts of Y 2O 3.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry