Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Extending the Passive Region of CrFeNi-Based High Entropy Alloys
Uppsala University, Sweden.
RISE Research Institutes of Sweden, Säkerhet och transport, Elektrifiering och pålitlighet. Jönköping University, Sweden.ORCID-id: 0000-0002-2788-960x
Uppsala University, Sweden.
Uppsala University, Sweden.
Visa övriga samt affilieringar
2023 (Engelska)Ingår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 33, nr 51, artikel-id 2307897Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study provides principles for designing new corrosion resistant high entropy alloys. The theoretical framework is a percolation model developed by Newman and Sieradzki that predicts the ability of an alloy to passivate, i.e., to form a protective surface oxide, based on its composition. Here, their model is applied to more complex materials than previously, namely amorphous CrFeNiTa and CrFeNiW alloys. Furthermore, the model describes a more complex passivation process: reforming the oxide layer above the transpassive potential of Cr. The model is used to predict the lowest concentration of Ta or W required to extend the passive region, yielding 11–14 at% Ta and 14–17 at% W. For CrFeNiTa, experiments reveal a threshold value of 13–15 at% Ta, which agrees with the prediction. For CrFeNiW, the experimentally determined threshold value is 37–45 at% W, far above the predicted value. Further investigations explore why the percolation model fails to describe the CrFeNiW system; key factors are the higher nobility and the pH sensitivity of W. These results demonstrate some limitations of the percolation model and offer complementary passivation criteria, while providing a design route for combining the properties of the 3d transition metal and refractory metal groups. 

Ort, förlag, år, upplaga, sidor
John Wiley and Sons Inc , 2023. Vol. 33, nr 51, artikel-id 2307897
Nyckelord [en]
Cobalt alloys; Corrosion resistance; Entropy; Functional materials; High-entropy alloys; Iron alloys; Passivation; Refractory metals; Tantalum alloys; Ternary alloys; Complex materials; Corrosion-resistant; High entropy alloys; Materials design; Passivation process; Percolation models; Percolation theory; Surface oxide; Theoretical framework; Threshold-value; Solvents
Nationell ämneskategori
Materialkemi
Identifikatorer
URN: urn:nbn:se:ri:diva-67359DOI: 10.1002/adfm.202307897Scopus ID: 2-s2.0-85170376146OAI: oai:DiVA.org:ri-67359DiVA, id: diva2:1799412
Anmärkning

The authors acknowledged Myfab Uppsala for providing facilities and experimental support. Myfab is funded by the Swedish Research Council (2019‐00207) as a national research infrastructure. This study was performed in the framework of the competence center FunMat‐II which is financially supported by Vinnova (Grant No. 2016‐05156). L.M. and P.L. acknowledged the funding from Swedish Foundation for Strategic Research (Project No. ARC19‐0026) and the Smart Industry Sweden project funded by the Swedish Knowledge Foundation.

Tillgänglig från: 2023-09-22 Skapad: 2023-09-22 Senast uppdaterad: 2024-06-10Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Person

Mølmen, LiveLeisner, Peter

Sök vidare i DiVA

Av författaren/redaktören
Mølmen, LiveLeisner, Peter
Av organisationen
Elektrifiering och pålitlighet
I samma tidskrift
Advanced Functional Materials
Materialkemi

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 21 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf