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Scopus: 2 cites, Web of Science: 2 cites,
Nanomechanical behavior of 3D porous metal–ceramic nanocomposite Bi/Bi2 O3 films
Domingo Roca, Roger (Universitat Autònoma de Barcelona. Departament de Física)
Esqué-de los Ojos, D. (Universitat Autònoma de Barcelona. Departament de Física)
Guerrero Hernández, Miguel (Universitat Autònoma de Barcelona. Departament de Física)
Pellicer Vilà, Eva M. (Universitat Autònoma de Barcelona. Departament de Física)
Baró, M.D. (Universitat Autònoma de Barcelona. Departament de Física)
Suriñach, Santiago (Suriñach Cornet) (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Data: 2015
Resum: The nanomechanical properties of three-dimensional (3D) porous metal/metal oxide composite (Bi/Bi2O3) films grown by direct current electrodeposition have been studied by nanoindentation at two different loading rates. The synthesized films exhibit a mixture of crystallographic phases of metallic Bi and α-Bi2O3, as evidenced by X-ray diffraction. An in-situ compaction of the sample during the nanoindentation assays has been observed. This in-situ compaction has an influence over both the hardness and elastic modulus of the material, being more important on the latter and, therefore, on the determination of the degree of porosity of the composite film. The influence of the loading rate on the mechanical properties has been investigated. In addition, time-dependent deformation processes (creep tests) have been also performed, revealing an anelastic behavior irrespective of the loading rate. From these creep tests, a viscoelastic non-Newtonian behavior of the sample is evidenced, which is well-described by a three-element Voigt model.
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Metal/metal oxide composite ; Nanoindentation ; Loading rate ; Mechanical properties ; Viscoelastic non-Newtonian behavior ; Finite element simulations
Publicat a: Materials science & engineering A, Vol. 626 (Feb. 2015) , p. 150-158, ISSN 0921-5093

DOI: 10.1016/j.msea.2014.12.042

25 p, 2.1 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
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 Registre creat el 2015-01-13, darrera modificació el 2016-09-05

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