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Large mechanical properties enhancement in ceramics through vacancy-mediated unit cell disturbance.
Chen, Zhuo; Huang, Yong; Koutná, Nikola; Gao, Zecui; Sangiovanni, Davide G; Fellner, Simon; Haberfehlner, Georg; Jin, Shengli; Mayrhofer, Paul H; Kothleitner, Gerald; Zhang, Zaoli.
Afiliación
  • Chen Z; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, A-8700, Leoben, Austria.
  • Huang Y; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, A-8700, Leoben, Austria.
  • Koutná N; Institute of Materials Science and Technology, TU Wien, A-1060, Vienna, Austria.
  • Gao Z; Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden.
  • Sangiovanni DG; Institute of Materials Science and Technology, TU Wien, A-1060, Vienna, Austria.
  • Fellner S; Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden.
  • Haberfehlner G; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, A-8700, Leoben, Austria.
  • Jin S; Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Steyrergasse 17, 8010, Graz, Austria.
  • Mayrhofer PH; Chair of Ceramics, Montanuniversität Leoben, Peter-Tunner Strasse 5, 8700, Leoben, Austria.
  • Kothleitner G; Institute of Materials Science and Technology, TU Wien, A-1060, Vienna, Austria.
  • Zhang Z; Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Steyrergasse 17, 8010, Graz, Austria.
Nat Commun ; 14(1): 8387, 2023 Dec 16.
Article en En | MEDLINE | ID: mdl-38104109
ABSTRACT
Tailoring vacancies is a feasible way to improve the mechanical properties of ceramics. However, high concentrations of vacancies usually compromise the strength (or hardness). We show that a high elasticity and flexural strength could be achieved simultaneously using a nitride superlattice architecture with disordered anion vacancies up to 50%. Enhanced mechanical properties primarily result from a distinctive deformation mechanism in superlattice ceramics, i.e., unit-cell disturbances. Such a disturbance substantially relieves local high-stress concentration, thus enhancing deformability. No dislocation activity involved also rationalizes its high strength. The work renders a unique understanding of the deformation and strengthening/toughening mechanism in nitride ceramics.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Reino Unido