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Revisiting thermody...
Revisiting thermodynamics and kinetic diffusivities of uranium-niobium with Bayesian uncertainty analysis
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Duong, Thien C. (författare)
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Hackenberg, Robert E. (författare)
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Landa, Alex (författare)
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visa fler...
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Honarmandi, Pejman (författare)
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Talapatra, Anjana (författare)
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Volz, Heather M. (författare)
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Llobet, Anna (författare)
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Smith, Alice I. (författare)
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King, Graham (författare)
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Bajaj, Saurabh (författare)
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Ruban, Andrei (författare)
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- Vitos, Levente (författare)
- KTH,Tillämpad materialfysik
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Turchi, Patrice E. A. (författare)
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Arroyave, Raymundo (författare)
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visa färre...
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(creator_code:org_t)
- Elsevier, 2016
- 2016
- Engelska.
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Ingår i: CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY. - : Elsevier. - 0364-5916. ; 55, s. 219-230
- Relaterad länk:
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http://manuscript.el...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work, thermodynamic and kinetic diffusivities of uranium-niobium (U-Nb) are re-assessed by means of the CALPHAD (CALculation of PHAse Diagram) methodology. In order to improve the consistency and reliability of the assessments, first-principles calculations are coupled with CALPHAD. In particular, heats of formation of gamma-U-Nb are estimated and verified using various density-functional theory (DFT) approaches. These thermochemistry data are then used as constraints to guide the thermodynamic optimization process in such a way that the mutual-consistency between first-principles calculations and CALPHAD assessment is satisfactory. In addition, long-term aging experiments are conducted in order to generate new phase equilibria data at the gamma(2)/alpha + gamma(2) boundary. These data are meant to verify the thermodynamic model. Assessment results are generally in good agreement with experiments and previous calculations, without showing the artifacts that were observed in previous modeling. The mutual-consistent thermodynamic description is then used to evaluate atomic mobility and diffusivity of gamma-U-Nb. Finally, Bayesian analysis is conducted to evaluate the uncertainty of the thermodynamic model and its impact on the system's phase stability.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- DFT
- CALPHAD
- Bayesian
- Uncertainty analysis
- Metallic fuels
- U-Nb
- Thermodynamics
- Kinetic diffusivity
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Till lärosätets databas
- Av författaren/redakt...
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Duong, Thien C.
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Hackenberg, Robe ...
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Landa, Alex
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Honarmandi, Pejm ...
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Talapatra, Anjan ...
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Volz, Heather M.
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visa fler...
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Llobet, Anna
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Smith, Alice I.
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King, Graham
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Bajaj, Saurabh
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Ruban, Andrei
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Vitos, Levente
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Turchi, Patrice ...
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Arroyave, Raymun ...
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Annan fysik
- Artiklar i publikationen
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CALPHAD-COMPUTER ...
- Av lärosätet
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Kungliga Tekniska Högskolan