J. Mater. Sci. Technol. ›› 2025, Vol. 205: 191-203.DOI: 10.1016/j.jmst.2024.04.006

• Research Article • Previous Articles     Next Articles

Unveiling nano-scale chemical inhomogeneity in surface oxide films formed on V- and N-containing martensite stainless steel by synchrotron X-ray photoelectron emission spectroscopy/microscopy and microscopic X-ray absorption spectroscopy

Xiaoqi Yuea, Dihao Chena,b, Anantha Krishnanc, Isac Lazard, Yuran Niue, Evangelos Goliase, Carsten Wiemannf, Andrei Gloskovskiig, Christoph Schlueterg, Arno Jeroming, Thomas F. Kellerg,h, Haijie Tongi, Sebastian Ejnermarkc, Jinshan Pana,*   

  1. aKTH Royal Institute of Technology, Division of Surface and Corrosion Science, Stockholm, 100 44 Sweden;
    bUniversity of Science & Technology Beijing, Institute of Advanced Materials & Technology, Beijing 100083 China;
    cUddeholms AB, Hagfors, 683 85 Sweden;
    dLund University, Division of Synchrotron Radiation Research, Lund, 221 00 Sweden;
    eMAX IV Laboratory, Lund University, Lund, 221 00 Sweden;
    fPeter Grünberg Institute (PGI-6), Research Center Jülich, Jülich, D-52425 Germany;
    gGermany Centre for X-ray and Nano Science (CXNS), Deutsches Elektronen-Synchrotron DESY, Hamburg, 226 07, Germany;
    hDepartment of Physics, Hamburg University, Hamburg, 201 48 Germany;
    iInstitute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht, 215 02 Germany
  • Received:2024-02-13 Revised:2024-03-28 Accepted:2024-04-01 Published:2025-01-10 Online:2024-04-21
  • Contact: *E-mail address: jinshanp@kth.se (J. Pan)

Abstract: Nano-scale chemical inhomogeneity in surface oxide films formed on a V- and N-containing martensite stainless steel and tempering heating induced changes are investigated by a combination of synchrotron- based hard X-ray Photoelectron emission spectroscopy (HAXPES) and microscopy (HAXPEEM) as well as microscopic X-ray absorption spectroscopy (µ-XAS) techniques. The results reveal the inhomogeneity in the oxide films on the micron-sized Cr2N- and VN-type particles, while the inhomogeneity on the martensite matrix phase exists due to localised formation of nano-sized tempering nitride particles at 600 °C. The oxide film formed on Cr2N-type particles is rich in Cr2O3 compared with that on the martensite matrix and VN-type particles. With the increase of tempering temperature, Cr2O3 formation is faster for the oxidation of Cr in the martensite matrix than the oxidation of Cr nitride-rich particles.

Key words: Synchrotron X-ray photoelectron emission microscopy, Hard X-ray photoelectron emission spectroscopy, Synchrotron microscopic X-ray absorption spectroscopy, Martensite stainless steel, Surface oxide film