Exceptional hardness in multiprincipal element alloys via hierarchical oxygen heterogeneities.

Autor: Beaudry DC; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA., Waters MJ; Department of Materials Science & Engineering, Northwestern University, Evanston, IL, USA., Valentino GM; Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA., Foley DL; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA., Anber E; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA., Rakita Y; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA.; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA., Brandenburg CJ; Department of Materials Science & Engineering, University of Virginia, Charlottesville, VA, USA., Couzinié JP; Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France., Perrière L; Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France., Aoki T; Irvine Materials Research Institute (IMRI), University of California, Irvine, Irvine, CA, USA., Knipling KE; Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, DC, USA., Callahan PG; Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, DC, USA., Redemann BWY; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA.; Department of Chemistry, Johns Hopkins University, Baltimore, MD, USA.; William H. Miller III Department of Physics and Astronomy, Institute for Quantum Matter, Johns Hopkins University, Baltimore, MD, USA., McQueen TM; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA.; Department of Chemistry, Johns Hopkins University, Baltimore, MD, USA.; William H. Miller III Department of Physics and Astronomy, Institute for Quantum Matter, Johns Hopkins University, Baltimore, MD, USA., Opila EJ; Department of Materials Science & Engineering, University of Virginia, Charlottesville, VA, USA., Rondinelli JM; Department of Materials Science & Engineering, Northwestern University, Evanston, IL, USA., Taheri ML; Department of Materials Science & Engineering, Johns Hopkins University, Baltimore, MD, USA.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2024 Sep 20; Vol. 10 (38), pp. eado9697. Date of Electronic Publication: 2024 Sep 20.
DOI: 10.1126/sciadv.ado9697
Abstrakt: Refractory multiprincipal element alloys (RMPEAs) are potential successors to incumbent high-temperature structural alloys, although efforts to improve oxidation resistance with large additions of passivating elements have led to embrittlement. RMPEAs containing group IV and V elements have a balance of properties including moderate ductility, low density, and the necessary formability. We find that oxidation of group IV-V RMPEAs induces hierarchical heterogeneities, ranging from nanoscale interstitial complexes to tertiary phases. This microstructural hierarchy considerably enhances hardness without indentation cracking, with values ranging between 12.1 and 22.6 GPa from the oxide-adjacent metal to the surface oxides, a 3.7 to 6.8× increase over the interstitial-free alloy. Our fundamental understanding of the oxygen influence on phase formation informs future alloy design to enhance oxidation resistance and obtain exceptional hardness while preserving plasticity.
Databáze: MEDLINE