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Selective atomic sieving across metal/oxide interface for super-oxidation resistance.
Li, Shuang; Yang, Li; Christudasjustus, Jijo; Overman, Nicole R; Wirth, Brian D; Sushko, Maria L; Simonnin, Pauline; Schreiber, Daniel K; Gao, Fei; Wang, Chongmin.
Afiliación
  • Li S; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA.
  • Yang L; Department of Nuclear Engineering, University of Tennessee, Knoxville, TN, USA.
  • Christudasjustus J; Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
  • Overman NR; Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
  • Wirth BD; Department of Nuclear Engineering, University of Tennessee, Knoxville, TN, USA.
  • Sushko ML; Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
  • Simonnin P; Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
  • Schreiber DK; Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, USA. Daniel.Schreiber@pnnl.gov.
  • Gao F; Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, USA. gaofeium@umich.edu.
  • Wang C; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA. chongmin.wang@pnnl.gov.
Nat Commun ; 15(1): 6149, 2024 Jul 21.
Article en En | MEDLINE | ID: mdl-39034317
ABSTRACT
Surface passivation, a desirable natural consequence during initial oxidation of alloys, is the foundation for functioning of corrosion and oxidation resistant alloys ranging from industrial stainless steel to kitchen utensils. This initial oxidation has been long perceived to vary with crystal facet, however, the underlying mechanism remains elusive. Here, using in situ environmental transmission electron microscopy, we gain atomic details on crystal facet dependent initial oxidation behavior in a model Ni-5Cr alloy. We find the (001) surface shows higher initial oxidation resistance as compared to the (111) surface. We reveal the crystal facet dependent oxidation is related to an interfacial atomic sieving effect, wherein the oxide/metal interface selectively promotes diffusion of certain atomic species. Density functional theory calculations rationalize the oxygen diffusion across Ni(111)/NiO(111) interface, as contrasted with Ni(001)/NiO(111), is enhanced. We unveil that crystal facet with initial fast oxidation rate could conversely switch to a slow steady state oxidation.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido