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Esters M, Oses C, Hicks D, Mehl MJ, Jahnátek M, Hossain MD, Maria JP, Brenner DW, Toher C, Curtarolo S. Settling the matter of the role of vibrations in the stability of high-entropy carbides. Nat Commun 2021; 12:5747. [PMID: 34593798 PMCID: PMC8484556 DOI: 10.1038/s41467-021-25979-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/08/2021] [Indexed: 12/02/2022] Open
Abstract
High-entropy ceramics are attracting significant interest due to their exceptional chemical stability and physical properties. While configurational entropy descriptors have been successfully implemented to predict their formation and even to discover new materials, the contribution of vibrations to their stability has been contentious. This work unravels the issue by computationally integrating disorder parameterization, phonon modeling, and thermodynamic characterization. Three recently synthesized carbides are used as a testbed: (HfNbTaTiV)C, (HfNbTaTiW)C, and (HfNbTaTiZr)C. It is found that vibrational contributions should not be neglected when precursors or decomposition products have different nearest-neighbor environments from the high-entropy carbide. The contribution of vibrations to the stability of high-entropy ceramics is still controversial. Here the authors computationally integrate disorder parameterization, phonon modelling, and thermodynamic characterization to investigate the role of vibrations to the stability of high-entropy carbides.
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Affiliation(s)
- Marco Esters
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA
| | - Corey Oses
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA
| | - David Hicks
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA
| | - Michael J Mehl
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA
| | - Michal Jahnátek
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Mohammad Delower Hossain
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Jon-Paul Maria
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Donald W Brenner
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC, 27695, USA
| | - Cormac Toher
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA
| | - Stefano Curtarolo
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA. .,Center for Autonomous Materials Design, Duke University, Durham, NC, 27708, USA.
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Manley ME, Fultz B, Nagel LJ. Heat capacity and microstructure of ordered and disordered Pd3V. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810008208589] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. E. Manley
- a Division of Engineering and Applied Science , Mail 138-78, California Institute of Technology, Pasadena , CA , 91125 , USA
| | - B. Fultz
- a Division of Engineering and Applied Science , Mail 138-78, California Institute of Technology, Pasadena , CA , 91125 , USA
| | - L. J. Nagel
- b Engineering Technology, West Texas A&M University , Canyon , TX , 79016 , USA
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