Abstract
Thermal barrier coatings (TBC) consisting of atmospheric plasma-sprayed ZrO2-8 wt.% Y2O3 and a high velocity oxygen fuel-sprayed metallic bond coat were subjected to CO2 continuous wave laser treatments. The effects of laser power on TBCs were investigated as was the thermally grown oxide (TGO) layer development of all as-sprayed and laser-treated coatings after thermal oxidation tests in air environment for 50, 100, and 200 h at 1100 °C. The effects of laser power on TBCs were investigated. TGO layer development was examined on all as-sprayed and laser-treated coatings after thermal oxidation tests in air environment for 50,100, and 200 h at 1100 °C. Melted and heat-affected zone regions were observed in all the laser-treated samples. Oxidation tests showed a stable alumina layer and mixed spinel oxides in the TGO layers of the as-sprayed and laser-treated TBCs.
| Original language | English |
|---|---|
| Pages (from-to) | 2500-2509 |
| Number of pages | 10 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 22 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sept 2013 |
Funding
The authors are grateful for the financial support of the Scientific Research Project Office of Istanbul Technical University (ITU) for this project.
| Funders | Funder number |
|---|---|
| Istanbul Teknik Üniversitesi |
Keywords
- Laser treatment
- Plasma spraying
- Thermal barrier coatings
- Thermally grown oxide
- Yttria-stabilized zirconia