Abstract
The thermal barrier coating (TBC) systems, which improves the potential of gas turbine efficiency by increasing the inlet temperature and reducing the amount of cooling air, are discussed. The lifetime of TBC systems of commercial quality reduces with increasing temperature with a dependence which is broadly that for the growth of an alumina thermally grown oxide (TGO) between the bond coat and the partially-stabilized zirconia top coat. It is found that time at temperature and the growth of a bond coat TGO, are the dominant parameters that results in TBC degradation. A factor contributing to the large spread in TBC lifetimes is the variations in the roughness of the bond coat surface.
| Original language | English |
|---|---|
| Journal | Journal of Corrosion Science and Engineering |
| Volume | 6 |
| Publication status | Published - 2003 |
Keywords
- Chemical failure
- Oxidation
- TBC lifing
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry