Details
| Original language | English |
|---|---|
| Article number | 2400960 |
| Journal | Advanced engineering materials |
| Early online date | 14 Oct 2024 |
| Publication status | E-pub ahead of print - 14 Oct 2024 |
Abstract
In this study, oxidation behavior in as-cast polycrystalline HfNbTaTi3, HfNbTaTiZr, HfMoTaTiZr, and NbMoTaTiZr refractory high-entropy alloys (RHEAs), and the amorphous form of NbMoTaTiZr RHEA, is investigated. Herein, the surfaces of samples undergoing static oxidation experiments at 700, 800, and 900 °C using scanning electron microscopy, energy-dispersive X-Ray spectroscopy, X-Ray photoelectron spectroscopy, and X-Ray diffraction are explored. In the corresponding findings, the presence of three different oxidation behaviors in the studied RHEAs is shown: formation of a non-protective scale, powderization and pesting of the sample, and a distinct amorphous oxidation behavior compared to its polycrystalline counterpart. Notably, Nb appears to induce a detrimental effect on the oxidation properties of samples due to the high ratio of volume change between the oxide and the metal. In the current findings, it is also evidenced that Mo can cause catastrophic failure in RHEAs that lack a protective oxide layer. Overall, the results constitute a step forward in enhancing the understanding of oxidation behavior in RHEAs and developing novel oxidation-resistant RHEAs.
Keywords
- oxidation behaviors, oxide layers, refractory high-entropy alloys, volatile oxides, X-Ray photoelectron spectroscopies
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Advanced engineering materials, 14.10.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On the Surface Property–Oxidation Relationship in Refractory High-Entropy Alloys
AU - Nazarahari, Alireza
AU - Ozdemir, Huseyin Can
AU - Barienti, Khemais
AU - Unal, Ugur
AU - Canadinc, Demircan
AU - Maier, Hans Jürgen
N1 - Publisher Copyright: © 2024 The Author(s). Advanced Engineering Materials published by Wiley-VCH GmbH.
PY - 2024/10/14
Y1 - 2024/10/14
N2 - In this study, oxidation behavior in as-cast polycrystalline HfNbTaTi3, HfNbTaTiZr, HfMoTaTiZr, and NbMoTaTiZr refractory high-entropy alloys (RHEAs), and the amorphous form of NbMoTaTiZr RHEA, is investigated. Herein, the surfaces of samples undergoing static oxidation experiments at 700, 800, and 900 °C using scanning electron microscopy, energy-dispersive X-Ray spectroscopy, X-Ray photoelectron spectroscopy, and X-Ray diffraction are explored. In the corresponding findings, the presence of three different oxidation behaviors in the studied RHEAs is shown: formation of a non-protective scale, powderization and pesting of the sample, and a distinct amorphous oxidation behavior compared to its polycrystalline counterpart. Notably, Nb appears to induce a detrimental effect on the oxidation properties of samples due to the high ratio of volume change between the oxide and the metal. In the current findings, it is also evidenced that Mo can cause catastrophic failure in RHEAs that lack a protective oxide layer. Overall, the results constitute a step forward in enhancing the understanding of oxidation behavior in RHEAs and developing novel oxidation-resistant RHEAs.
AB - In this study, oxidation behavior in as-cast polycrystalline HfNbTaTi3, HfNbTaTiZr, HfMoTaTiZr, and NbMoTaTiZr refractory high-entropy alloys (RHEAs), and the amorphous form of NbMoTaTiZr RHEA, is investigated. Herein, the surfaces of samples undergoing static oxidation experiments at 700, 800, and 900 °C using scanning electron microscopy, energy-dispersive X-Ray spectroscopy, X-Ray photoelectron spectroscopy, and X-Ray diffraction are explored. In the corresponding findings, the presence of three different oxidation behaviors in the studied RHEAs is shown: formation of a non-protective scale, powderization and pesting of the sample, and a distinct amorphous oxidation behavior compared to its polycrystalline counterpart. Notably, Nb appears to induce a detrimental effect on the oxidation properties of samples due to the high ratio of volume change between the oxide and the metal. In the current findings, it is also evidenced that Mo can cause catastrophic failure in RHEAs that lack a protective oxide layer. Overall, the results constitute a step forward in enhancing the understanding of oxidation behavior in RHEAs and developing novel oxidation-resistant RHEAs.
KW - oxidation behaviors
KW - oxide layers
KW - refractory high-entropy alloys
KW - volatile oxides
KW - X-Ray photoelectron spectroscopies
UR - http://www.scopus.com/inward/record.url?scp=85206209007&partnerID=8YFLogxK
U2 - 10.1002/adem.202400960
DO - 10.1002/adem.202400960
M3 - Article
AN - SCOPUS:85206209007
JO - Advanced engineering materials
JF - Advanced engineering materials
SN - 1438-1656
M1 - 2400960
ER -