Szczegóły publikacji
Opis bibliograficzny
Tailoring Al-Cr-Fe-Ni high entropy systems for optimal high-temperature oxidation properties / Richard GAWEŁ, Zbigniew GRZESIK // Corrosion Science ; ISSN 0010-938X . — 2026 — vol. 264 art. no. 113786, s. 1-17. — Bibliogr. s. 16-17, Abstr. — Publikacja dostępna online od: 2026-03-17
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 166866 |
|---|---|
| Data dodania do BaDAP | 2026-04-01 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.corsci.2026.113786 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Corrosion Science |
Abstract
The goal of this work is to determine the influence of increasing and decreasing individual elements in selected AlCrFeNi high entropy alloys (HEAs) on their oxidation properties, microstructure and phase composition. To that end, AlCrFeNi HEAs were synthesized and subjected to cyclic temperature changes (room temperature – 1000 °C) in air for several hundred hours. Scanning electron microscopy combined with energy dispersive X-ray spectroscopy and X-ray diffraction were performed on the studied samples before and after the oxidation process to determine all changes that occurred in the materials. The combined studies indicated that two of the HEAs with nominal compositions (in at%): Al20Cr30Fe10Ni40 and Al25Cr25Fe25Ni25 could grow a pure alumina protective scale, whereas the scales formed on the remaining samples (Al30Cr15Fe15Ni40, Al25Cr25Fe15Ni35 and Al20Cr10Fe30Ni40) consisted of an outer spinel oxide, an intermediate Cr2O3 and an Al2O3 inner layer. Additionally, significant internal oxidation and nitridation was observed for the Ni-rich alloys with Al content ≥ 25 at%, in contrast to the equimolar Al25Cr25Fe25Ni25 alloy. The highest weight gain during the oxidation process was determined for Al30Cr15Fe15Ni40 (highest internal oxidation and nitridation), and largest mass loss for Al20Cr10Fe30Ni40 due to poor outer scale adhesion, indicating the negative impact of excessive Fe content in the system. In conclusion, Al25Cr25Fe25Ni25 and Al20Cr30Fe10Ni40 exhibited superior oxidation properties compared to the other HEAs in this work. Additionally, Al25Cr25Fe25Ni25 demonstrated the least visible changes in microstructure and phase composition among the studied HEAs.
