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Adsorption and desorption of oxygen at metal-oxide interfaces: Two-dimensional modeling approaches

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Abstract

A numerical approach is presented for the segregation of atomic oxygen at Ag-MgO interfaces for a system of MgO particles dispersed in an Ag matrix. General segregation kinetics is considered, and the coupled system of partial differential equations is solved using a two-dimensional finite element scheme. An indirect integration procedure for the oxygen surface coverage has been implemented into a commercial code. This numerical approach allows for the consideration of general boundary conditions, specimen sizes, and time- or concentration-dependent material and process parameters. The method is applied to periodic and stochastic model oxide distributions.

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Authors and Affiliations

  1. Centre for Mechanical Technology and Automation, University of Aveiro and Department of Mechanical Engineering, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal

    A. Öchsner & J. Grácio

  2. Centre for Mechanical Technology and Automation, University of Aveiro Campus Universitário de Santiago, 3810-193, Aveiro, Portugal

    M. Stasiek

Authors
  1. A. Öchsner
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  2. J. Grácio
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  3. M. Stasiek
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Correspondence to A. Öchsner.

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Öchsner, A., Grácio, J. & Stasiek, M. Adsorption and desorption of oxygen at metal-oxide interfaces: Two-dimensional modeling approaches. JPED 27, 644–650 (2006). https://doi.org/10.1007/BF02736567

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  • DOI: https://doi.org/10.1007/BF02736567

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