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

NameVTT Technology
Number216
ISSN (Electronic)2242-1211

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).
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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.",
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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).