Oxidation model for construction materials in supercritical water: estimation of kinetic and transport parameters

Sami Penttilä, Iva Betova, Martin Bojinov, Petri Kinnunen, Aki Toivonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    In the present paper, the kinetic and transport parameters of inner and outer layer growth on two ODS (Oxide Dispersion Strengthened) alloys, PM2000 and MA956, is presented. Parameters are estimated using an upgraded model that assumes that the growth of the outer layer is governed by the transport of cations through the inner layer via an interstitialcy mechanism. The updated model is able to reproduce accurately the depth profiles of individual constituent elements in the inner and outer layers, as well as in the diffusion/transition layer of the alloy situated between the inner layer and the bulk substrate. As a result of the calculations, kinetic and transport parameters of inner and outer layer growth are estimated for oxidation times from 600 to 2000 h at 650 °C. The main conclusion that can be drawn from the calculations is that the most of the rate constants and also the diffusion coefficients tend to decrease with time of oxidation at a constant temperature.
    Original languageEnglish
    Title of host publication Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015)
    PublisherVTT Technical Research Centre of Finland
    Number of pages13
    EditionUSB stick
    ISBN (Electronic)978-951-38-8289-1
    ISBN (Print)978-951-38-8290-7
    Publication statusPublished - 2015
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7 - Helsinki, Finland
    Duration: 15 Mar 201518 Mar 2015

    Publication series

    SeriesVTT Technology
    Number216

    Conference

    Conference7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7
    Abbreviated titleISSCWR-7
    CountryFinland
    CityHelsinki
    Period15/03/1518/03/15

    Fingerprint

    oxidation
    kinetics
    water
    transition layers
    diffusion coefficient
    cations
    oxides
    profiles
    temperature

    Cite this

    Penttilä, S., Betova, I., Bojinov, M., Kinnunen, P., & Toivonen, A. (2015). Oxidation model for construction materials in supercritical water: estimation of kinetic and transport parameters. In Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015) (USB stick ed.). [2064] VTT Technical Research Centre of Finland. VTT Technology, No. 216
    Penttilä, Sami ; Betova, Iva ; Bojinov, Martin ; Kinnunen, Petri ; Toivonen, Aki. / Oxidation model for construction materials in supercritical water : estimation of kinetic and transport parameters. Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick. ed. VTT Technical Research Centre of Finland, 2015. (VTT Technology; No. 216).
    @inproceedings{c69739de801749ea925a81745be2b65a,
    title = "Oxidation model for construction materials in supercritical water: estimation of kinetic and transport parameters",
    abstract = "In the present paper, the kinetic and transport parameters of inner and outer layer growth on two ODS (Oxide Dispersion Strengthened) alloys, PM2000 and MA956, is presented. Parameters are estimated using an upgraded model that assumes that the growth of the outer layer is governed by the transport of cations through the inner layer via an interstitialcy mechanism. The updated model is able to reproduce accurately the depth profiles of individual constituent elements in the inner and outer layers, as well as in the diffusion/transition layer of the alloy situated between the inner layer and the bulk substrate. As a result of the calculations, kinetic and transport parameters of inner and outer layer growth are estimated for oxidation times from 600 to 2000 h at 650 °C. The main conclusion that can be drawn from the calculations is that the most of the rate constants and also the diffusion coefficients tend to decrease with time of oxidation at a constant temperature.",
    author = "Sami Penttil{\"a} and Iva Betova and Martin Bojinov and Petri Kinnunen and Aki Toivonen",
    year = "2015",
    language = "English",
    isbn = "978-951-38-8290-7",
    series = "VTT Technology",
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    booktitle = "Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015)",
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    Penttilä, S, Betova, I, Bojinov, M, Kinnunen, P & Toivonen, A 2015, Oxidation model for construction materials in supercritical water: estimation of kinetic and transport parameters. in Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick edn, 2064, VTT Technical Research Centre of Finland, VTT Technology, no. 216, 7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7, Helsinki, Finland, 15/03/15.

    Oxidation model for construction materials in supercritical water : estimation of kinetic and transport parameters. / Penttilä, Sami; Betova, Iva; Bojinov, Martin; Kinnunen, Petri; Toivonen, Aki.

    Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick. ed. VTT Technical Research Centre of Finland, 2015. 2064 (VTT Technology; No. 216).

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    TY - GEN

    T1 - Oxidation model for construction materials in supercritical water

    T2 - estimation of kinetic and transport parameters

    AU - Penttilä, Sami

    AU - Betova, Iva

    AU - Bojinov, Martin

    AU - Kinnunen, Petri

    AU - Toivonen, Aki

    PY - 2015

    Y1 - 2015

    N2 - In the present paper, the kinetic and transport parameters of inner and outer layer growth on two ODS (Oxide Dispersion Strengthened) alloys, PM2000 and MA956, is presented. Parameters are estimated using an upgraded model that assumes that the growth of the outer layer is governed by the transport of cations through the inner layer via an interstitialcy mechanism. The updated model is able to reproduce accurately the depth profiles of individual constituent elements in the inner and outer layers, as well as in the diffusion/transition layer of the alloy situated between the inner layer and the bulk substrate. As a result of the calculations, kinetic and transport parameters of inner and outer layer growth are estimated for oxidation times from 600 to 2000 h at 650 °C. The main conclusion that can be drawn from the calculations is that the most of the rate constants and also the diffusion coefficients tend to decrease with time of oxidation at a constant temperature.

    AB - In the present paper, the kinetic and transport parameters of inner and outer layer growth on two ODS (Oxide Dispersion Strengthened) alloys, PM2000 and MA956, is presented. Parameters are estimated using an upgraded model that assumes that the growth of the outer layer is governed by the transport of cations through the inner layer via an interstitialcy mechanism. The updated model is able to reproduce accurately the depth profiles of individual constituent elements in the inner and outer layers, as well as in the diffusion/transition layer of the alloy situated between the inner layer and the bulk substrate. As a result of the calculations, kinetic and transport parameters of inner and outer layer growth are estimated for oxidation times from 600 to 2000 h at 650 °C. The main conclusion that can be drawn from the calculations is that the most of the rate constants and also the diffusion coefficients tend to decrease with time of oxidation at a constant temperature.

    M3 - Conference article in proceedings

    SN - 978-951-38-8290-7

    T3 - VTT Technology

    BT - Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015)

    PB - VTT Technical Research Centre of Finland

    ER -

    Penttilä S, Betova I, Bojinov M, Kinnunen P, Toivonen A. Oxidation model for construction materials in supercritical water: estimation of kinetic and transport parameters. In Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick ed. VTT Technical Research Centre of Finland. 2015. 2064. (VTT Technology; No. 216).