Effect of Nb Addition on Oxidation Mechanisms of High Cr Ferritic Steel in Ar-H2-H2O

被引:19
|
作者
Vayyala, A. [1 ]
Povstugar, I [1 ]
Galiullin, T. [2 ]
Naumenko, D. [2 ]
Quadakkers, W. J. [2 ]
Hattendorf, H. [3 ]
Mayer, J. [4 ]
机构
[1] Forschungszentrum Julich, Cent Inst Engn Elect & Analyt ZEA 3, Julich, Germany
[2] Forschungszentrum Julich, Microstruct & Properties Mat IEK 2, Julich, Germany
[3] VDM Met Grp, Werdohl, Germany
[4] Rhein Westfal TH Aachen, Cent Facil Electron Microscopy GFE, Aachen, Germany
来源
OXIDATION OF METALS | 2019年 / 92卷 / 5-6期
关键词
Ferritic steels; High-temperature oxidation; Atom probe tomography; Chromia; Grain boundaries; SOEC; GRAIN-BOUNDARIES; ATOM-PROBE; METALLIC INTERCONNECTS; VACANCY INJECTION; STAINLESS-STEEL; CO-ELECTROLYSIS; SCALE FORMATION; SPACE-CHARGE; SOFC STACK; OXIDE;
D O I
10.1007/s11085-019-09933-x
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
High chromium ferritic steels are being used as construction materials for interconnects in solid oxide electrolysis cells (SOEC). Addition of niobium in the range of a few tenths of a percent is suitable for increasing the high-temperature creep strength of this type of ferritic steel. In the present work, the high-temperature isothermal oxidation behavior of a niobium containing ferritic steel at 800 degrees C was investigated in Ar-4%H-2-4%H2O gas simulating the service environment in an SOEC (cathode side) and compared with that of a Nb-free counterpart alloy. Gravimetric data were correlated with the results from microstructural analyses using, among others, scanning and transmission electron microscopy as well as glow discharge optical emission spectroscopy. Atom probe tomography was used for obtaining atomic-scale insight into the segregation processes in external oxides and their interfaces. The oxidation rate was substantially higher for the Nb-containing than for the Nb-free alloy. Both alloys formed double-layered oxide scales consisting of inner chromia and outer MnCr2O4 spinel. Additionally, a thin layer of rutile-type Nb(Ti,Cr)O-2 oxide of 200-300 nm thickness was observed at the scale-alloy interface in the Nb-containing steel. Nb addition to the alloy led to its segregation at chromia grain boundaries which affected the diffusion of Cr and other solute species such as Ti, Mn and Si.
引用
收藏
页码:471 / 491
页数:21
相关论文
共 50 条
  • [1] Effect of Nb Addition on Oxidation Mechanisms of High Cr Ferritic Steel in Ar–H2–H2O
    A. Vayyala
    I. Povstugar
    T. Galiullin
    D. Naumenko
    W. J. Quadakkers
    H. Hattendorf
    J. Mayer
    Oxidation of Metals, 2019, 92 : 471 - 491
  • [2] Temperature dependence of oxide scale formation on high-Cr ferritic steels in Ar-H2-H2O
    Young, D. J.
    Zurek, J.
    Singheiser, L.
    Quadakkers, W. J.
    CORROSION SCIENCE, 2011, 53 (06) : 2131 - 2141
  • [3] The effect of gas flow rate on the oxide scale morphology of a 10%Cr-ferritic steels in Ar-H2O and Ar-H2-H2O mixtures
    Zurek, J.
    Michalik, M.
    Singheiser, L.
    Quadakkers, W. J.
    HIGH-TEMPERATURE OXIDATION AND CORROSION 2005, 2006, 522-523 : 155 - 162
  • [4] Oxidation properties of ferritic stainless steel in dual Ar-H2-H2O/air atmosphere exposure with regard to SOFC interconnect application
    Stygar, Miroslaw
    Brylewski, Tomasz
    Kruk, Andrzej
    Przybylski, Kazimierz
    SOLID STATE IONICS, 2014, 262 : 449 - 453
  • [5] Oxidation Properties of Metal/Ceramic Interconnectors for SOFC's in Air, Ar-H2-H2O and Ar-CH4-H2O Atmospheres
    Prybylski, Kazimierz
    HIGH-TEMPERATURE OXIDATION AND CORROSION 2010, 2011, 696 : 400 - 405
  • [6] Effect of H2/H2O ratio on thermally grown chromia scales formed on Ni25Cr alloy in Ar-H2-H2O atmospheres at 1000°C
    Haensel, M.
    Garcia-Fresnillo, L.
    Tobing, S. L.
    Shemet, V.
    MATERIALS AT HIGH TEMPERATURES, 2012, 29 (03) : 187 - 192
  • [7] Oxidation kinetics and electrical properties of oxide scales formed under exposure to air and Ar-H2-H2O atmospheres on the Crofer 22 H ferritic steel for high-temperature applications such as interconnects in solid oxide cell stacks
    Brylewski, Tomasz
    Molin, Sebastian
    Stygar, Miroslaw
    Bik, Maciej
    Jelen, Piotr
    Sitarz, Maciej
    Gil, Aleksander
    Chen, Ming
    Hendriksen, Peter Vang
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2024, 94 : 209 - 222
  • [8] Influence of Gaseous Media Flow in the Dual Ar-H2-H2O/air Atmosphere Setup on the Scale Growth Kinetics of Crofer 22APU Ferritic Stainless Steel
    Stygar, Miroslaw
    Dabrowa, Juliusz
    Dziembaj, Piotr
    Brylewski, Tomasz
    JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2017, 26 (02) : 540 - 546
  • [9] Influence of Gaseous Media Flow in the Dual Ar-H2-H2O/air Atmosphere Setup on the Scale Growth Kinetics of Crofer 22APU Ferritic Stainless Steel
    Mirosław Stygar
    Juliusz Dąbrowa
    Piotr Dziembaj
    Tomasz Brylewski
    Journal of Materials Engineering and Performance, 2017, 26 : 540 - 546
  • [10] The Effect of Water-Vapor Content and Gas Flow Rate on the Oxidation Mechanism of a 10%Cr-Ferritic Steel in Ar-H2O Mixtures
    J. Żurek
    M. Michalik
    F. Schmitz
    T. -U. Kern
    L. Singheiser
    W. J. Quadakkers
    Oxidation of Metals, 2005, 63 : 401 - 422