PVD Ce-coating to mitigate intergranular oxidation of additively manufactured Ni-base alloy IN625
Abstract 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 Cr 2 O 3 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.
Authors
- Mohammad Sattari (ORCID: https://orcid.org/0000-0001-5817-4212)
- Mattias Thuvander (ORCID: https://orcid.org/0000-0002-6097-6895)
- E. Wessel
- Krystyna Stiller (ORCID: https://orcid.org/0000-0001-5825-4351)
- A. Chyrkin (ORCID: https://orcid.org/0000-0002-4355-3030)
- M. Halvarsson
- Andrea Fazi (ORCID: https://orcid.org/0000-0002-2838-6799)
- D. Naumenko (ORCID: https://orcid.org/0000-0001-9026-8585)
- Jan Froitzheim (ORCID: https://orcid.org/0000-0001-6339-6004)
Institutions
- Forschungszentrum Jülich (DE)
- Chalmers University of Technology (SE)
Publication Details
- Journal
- npj Materials Degradation
- Published
- 2025-09-29
- DOI
- https://doi.org/10.1038/s41529-025-00677-5
- Citations
- 1
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 0.71
Funders
- European Commission
- Chalmers Tekniska Högskola
- Energimyndigheten