PVD Ce-coating to mitigate intergranular oxidation of additively manufactured Ni-base alloy IN625
Journal article, 2025
Additively manufactured Ni-base alloy IN625 suffered from intergranular oxidation (IGO) during air exposure at 900 °C. IGO is triggered by oxide buckling over the alloy’s grain boundaries (GBs), followed by oxidation of the open intergranular voids. Application of a 10 nm thick PVD coating of Ce induced a slower inward growth of the Cr2O3 scale, better oxide adherence and as a result strongly suppressed IGO. The main beneficial effect provided by Ce is improved oxide adherence preventing oxide buckling and oxidation of intergranular voids.
Author
Anton Chyrkin
Materials Chemistry
Andrea Fazi
Massachusetts Institute of Technology (MIT)
Chalmers, Physics, Microstructure Physics
Mohammad Sattari
Chalmers, Physics, Microstructure Physics
Mattias Thuvander
Chalmers, Physics, Microstructure Physics
Marta Krystyna Stiller
Chalmers, Physics, Microstructure Physics
Mats Halvarsson
Chalmers, Physics, Microstructure Physics
E. Wessel
Jülich Research Centre
D. Naumenko
Jülich Research Centre
Jan Froitzheim
Chalmers, Chemistry and Chemical Engineering, Energy and Material
npj Materials Degradation
2397-2106 (eISSN)
Vol. 9 1 117Subject Categories (SSIF 2025)
Metallurgy and Metallic Materials
DOI
10.1038/s41529-025-00677-5