High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime

Pauline Audigié (1) , Aurélie Vande Put (1) , André Malié (2) , Carole Thouron (1) , Daniel Monceau (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 SAFRAN Group

Three kinds of Pt-rich γ-γ’ bond-coating were processed with different contents in Pt and Al. The cyclic oxidation tests performed at 1100 °C on TBC systems showed the superiority of the Pt-rich γ-γ’ coatings when compared with the β-(Ni,Pt)Al reference system. TBCs with a Pt-only bond-coating provided the highest performance. Whatever the bond-coating, the failure occurred at the TGO/bond-coating interface which appeared to be the weak point of these γ-γ’ bond-coating based systems. Al addition during bond-coating fabrication did not improve the durability. A decrease of 2 μm of electroplated Pt thickness led to a higher performance than the reference systems.

Mots clés: Metal coatings; Platinum; Aluminium; Superalloys; Oxidation

Domaines: Matériaux

Pauline Audigié, Aurélie Vande Put, André Malié, Carole Thouron, Daniel Monceau. High-temperature cyclic oxidation of Pt-rich γ-γ’ bond-coatings. Part II: Effect of Pt and Al on TBC system lifetime. Corrosion Science, 2019, 150, pp.1-8. ⟨10.1016/j.corsci.2019.01.003⟩. ⟨hal-03020039⟩