The incorporation of Cr in enhancing the corrosion resistance, mechanical property and thermal stability of NbMoTaCrx coatings
Rattachement africain : cn, gb. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Refractory high-entropy alloy (RHEA) coatings with superior corrosion, mechanical properties and thermal stability are promising for complex environments such as high-temperature and multi-factor coupled corrosion conditions. The effects of Cr (Chromium) on the corrosion and thermal stability of NbMoTaCr x coatings are investigated. Results demonstrates that NbMoTaCr 1.4 coating has the optimal corrosion performance, with the highest corrosion potential of −0.16 V and lowest corrosion current density of 0.01 μA cm −2 . The passive film of NbMoTaCr 1.4 coating is relatively more stable due to its higher reduction potential and lower semiconductor Fermi level. BCC (body-centered cubic) solid solution structures are retained even annealed at 800 °C, revealing good thermal stability of NbMoTaCr x coatings. 400 °C-annealed NbMoTaCr 1.4 coating with fine grain sizes has a higher hardness of 11.4 GPa. Solid solution strengthening effects are dominated by modulus distortion of all NbMoTaCr x coatings, and smallest atomic size distortion exhibits in equiatomic NbMoTaCr coating. In conclusion, the incorporation of Cr significantly enhances the corrosion and mechanical properties, and the NbMoTaCr x coatings possesses excellent thermal stability. • NbMoTaCr x coatings with varying Cr contents are deposited using magnetron co-sputtering. • NbMoTaCr 1.4 possesses the superior corrosion resistance with higher E corr and lower i corr . • The passive film on the NbMoTaCr 1.4 coating is stabler with higher reduction potential and lower semiconductor Fermi level. • NbMoTaCr x coatings exhibit excellent thermal stability with BCC structure maintaining stable up to 800 °C. • Modulus distortion predominates in the solid solution strengthening of NbMoTaCr x coatings.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- The incorporation of Cr in enhancing the corrosion resistance, mechanical property and thermal stability of NbMoTaCrx coatings
- Date Crossref
- 01/05/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Henan Academy of Sciences pays non établi dans la noticeStructure de recherche
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University of Leeds pays non établi dans la noticeUniversité ou école supérieure
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North China University of Water Resources and Electric Power pays non établi dans la noticeUniversité ou école supérieure
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Xi'an Jiaotong University State Key Laboratory for Mechanical Behavior of Materials pays non établi dans la noticeUniversité ou école supérieure
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Institute of Chemistry pays non établi dans la noticeStructure de recherche
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School of Mechanical Engineering Institute of Functional Surfaces pays non établi dans la noticeUniversité ou école supérieure
Henan Academy of Sciences, University of Leeds et North China University of Water Resources and Electric Power, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.