Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11007804 | Corrosion Science | 2018 | 45 Pages |
Abstract
The cyclic oxidation behaviour of several compositions of Pt-rich γ-γ' bond-coatings on AM1 superalloy was studied at 1100â°C and was compared to the β-(Ni,Pt)Al coated and uncoated superalloy. AM1 superalloy exhibited an outstanding performance due to an optimized Hf doping and a low sulfur content. The Pt-rich γ-γ' bond-coatings showed a better cyclic oxidation resistance than the reference system with a β-(Ni,Pt)Al coating. Aluminium addition during fabrication was found to be beneficial to improve the oxidation behaviour of Pt-rich γ-γ' bond-coatings. Their breakaway resulted from an insufficient aluminium content below the TGO whereas the reference system suffered from rumpling.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Pauline Audigié, Aurélie Rouaix-Vande Put, André Malié, Daniel Monceau,