Role of Pt in improving the oxidation and spallation resistance of Al0.7CrFeCoNi high-entropy alloy coatings at 1200 °C
A Pt + Al0.7CrFeCoNi high-entropy alloy (Pt + HEA) coating is designed to address the degradation of conventional coatings at 1200 °C. It allows a uniform distribution of Pt inside the coating under 1200 °C oxidation, demonstrating superior oxidation resistance and service stability through synergistic mechanisms: (1) suppresses oxide spallation by chemical oxide stabilization and mechanical stress alleviation, (2) retards elemental interdiffusion and depletion by Pt-induced lattice distortion and (3) decreases the thermodynamic driving force for topologically close-packed (TCP) phase precipitation. These effects, collectively stabilizing adherent α-Al2O3 scales while inhibiting TCP formation, effectively achieve a coating’s service life extension, establishing a framework for designing coatings with enhanced ultrahigh-temperature performance.
Authors
- Shusuo Li (ORCID: https://orcid.org/0000-0001-9771-9510)
- Hang Su (ORCID: https://orcid.org/0000-0003-4072-2529)
- Jianwei Shao
- Antong Zhi
- Jiarui Zhang (ORCID: https://orcid.org/0000-0003-1593-444X)
- Yuan Liu (ORCID: https://orcid.org/0000-0003-3081-696X)
- Heng Zhang (ORCID: https://orcid.org/0000-0003-1825-8256)
- Fan Qu
- Yanling Pei (ORCID: https://orcid.org/0000-0003-4415-1735)
- Shengkai Gong (ORCID: https://orcid.org/0009-0002-8962-6183)
- Geng Li (ORCID: https://orcid.org/0000-0002-7342-4539)
Publication Details
- Journal
- Journal of Materials Research and Technology
- Published
- 2025-11-01
- DOI
- https://doi.org/10.1016/j.jmrt.2025.11.105
- Primary Topic
- High Entropy Alloys Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00