High-entropy carbonitrides with superior oxidation resistance: Fabrication and investigation of oxidation behavior under non-isothermal and isothermal conditions

In this work, the influence of refractory Zr and Ti and their combination (Zr,Ti) on the oxidation behavior of the (Hf,Ta,Nb)(C,N) carbonitride under non-isothermal and isothermal conditions at 1200 °C was studied, the effect of nitrogen addition was demonstrated, and a possible oxidation mechanisms...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2025-03, Vol.45 (3), p.116980, Article 116980
Main Authors: Suvorova, Veronika, Suvorov, Dmitrii, Volodko, Sergey, Poliakov, Maksim, Volkova, Lidiya, Nepapushev, Andrey, Moskovskikh, Dmitry
Format: Article
Language:English
Subjects:
Carbonitride
High-entropy ceramics
High-temperature
Kinetics
Oxidation
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Summary:In this work, the influence of refractory Zr and Ti and their combination (Zr,Ti) on the oxidation behavior of the (Hf,Ta,Nb)(C,N) carbonitride under non-isothermal and isothermal conditions at 1200 °C was studied, the effect of nitrogen addition was demonstrated, and a possible oxidation mechanisms were identified. The best result was achieved for high-entropy carbonitride (Hf,Ta,Nb,Zr,Ti)(C,N). The introduction of nitrogen into the of high-entropy carbide lattice contributed to a decrease in the specific weight gain by 12 %, and the addition of Ti, Zr, and (Zr,Ti) to the (Hf,Ta,Nb)(C,N) – a decrease of 47, 65, and 83 %, respectively. [Display omitted]
ISSN:0955-2219
DOI:10.1016/j.jeurceramsoc.2024.116980