Water vapor oxidation behavior and mechanism of high-entropy (TiZrNbTaCr)C at 1200°C
Source abstract
Abstract
High-entropy (TiZrNbTaCr)C ceramics with different Cr content were oxidized at 1200°C in water vapor. Zr 6(Nb, Ta) 2O 17, (Nb, Ta) 2O 5 and (Ti, Nb, Ta, Cr)O 2 were initial oxidation products. After a 4-h oxidation, TiO 2-(Nb, Ta) 2O 5 was produced and changed from Ti(Nb, Ta) 2O 7 to Ti 2(Nb, Ta) 10O 29 with increasing Cr content, resulting in better oxidation resistance. TiO 2-(Nb, Ta) 2O 5 with large size and relatively dense microstructure impeded the inward diffusion of water vapor, slowing down the oxidation rate and causing the change of oxidation kinetics from linear to parabolic. The formation process of the oxide scale was discussed and the corrosion mechanism was proposed.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · High Entropy Alloys Studies · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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