Formation of rutile (Cr,Ta,Ti)O2 oxides during oxidation of refractory high entropy alloys in Ta-Mo-Cr-Ti-Al system

Schellert, Steven; Weber, M.; Christ, H.‐J.; Wiktor, C.; Butz, Benjamin; Galetz, Mathias C.; Laube, Stephan; Kauffmann, Alexander; Heilmaier, Martin; Gorr, Bronislava

doi:10.1016/j.corsci.2022.110885

Cited by 18 publications

(2 citation statements)

References 80 publications

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“…-Oxidized TMCA (Figure 7 present diffraction peaks at similar positions [54]) were also identified. Two wide peaks are attributed to the TMCTA substrate beneath the oxide layers.…”

Section: Tmca and Tmcta Samplesmentioning

confidence: 73%

Influence of the oxidation on the optical properties of Mo-Si-Ti, Ta-Mo-Cr-Al and Ta-Mo-Cr-Ti-Al alloys

Charpentier,

Kauffmann,

Bêche

et al. 2023

Materials Today Communications

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“…-Oxidized TMCA (Figure 7 present diffraction peaks at similar positions [54]) were also identified. Two wide peaks are attributed to the TMCTA substrate beneath the oxide layers.…”

Section: Tmca and Tmcta Samplesmentioning

confidence: 73%

Influence of the oxidation on the optical properties of Mo-Si-Ti, Ta-Mo-Cr-Al and Ta-Mo-Cr-Ti-Al alloys

Charpentier,

Kauffmann,

Bêche

et al. 2023

Materials Today Communications

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“…Refractory HEAs present excellent mechanical properties at high temperature; however, the oxidation resistance is a limitation for most of the refractory elements [18]. Despite this, rutile-type oxides (Cr,Ta,Ti)O 2 seem to protect refractory alloys at temperatures as high as 1500 • C, considerably surpassing the application temperatures of chromia-forming superalloys [19]. Regarding manufacturing processes, additive manufacturing technologies took shape and developed rapidly as a commercial tool in the last decades.…”

mentioning

confidence: 99%

Advanced Corrosion and High-Temperature Protection through Surface Modification and Coatings

Fernandes,

Baldan,

de Sousa Malafaia

2023

Coatings

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On the Surface Property–Oxidation Relationship in Refractory High‐Entropy Alloys

Nazarahari,

Ozdemir,

Barienti

et al. 2024

Adv Eng Mater

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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.

show abstract

Formation of rutile (Cr,Ta,Ti)O2 oxides during oxidation of refractory high entropy alloys in Ta-Mo-Cr-Ti-Al system

Cited by 18 publications

References 80 publications

Influence of the oxidation on the optical properties of Mo-Si-Ti, Ta-Mo-Cr-Al and Ta-Mo-Cr-Ti-Al alloys

Influence of the oxidation on the optical properties of Mo-Si-Ti, Ta-Mo-Cr-Al and Ta-Mo-Cr-Ti-Al alloys

Advanced Corrosion and High-Temperature Protection through Surface Modification and Coatings

On the Surface Property–Oxidation Relationship in Refractory High‐Entropy Alloys

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