Startseite Technik (Fe, Cr)6Nb6Ox phase of the filled Ti2Ni type with × ± 0.75 in the quaternary Cr–Fe–Nb–O system
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(Fe, Cr)6Nb6Ox phase of the filled Ti2Ni type with × ± 0.75 in the quaternary Cr–Fe–Nb–O system

  • A. Malfliet , F. Chassagne , J.-D. Mithieux , B. Blanpain und P. Wollants
Veröffentlicht/Copyright: 11. Juni 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 102 Heft 1

Abstract

The effect of O on the phase equilibria in Nb–Fe–Cr alloys, more specifically on the formation of a Ti2Ni type phase, has been studied. Nb–xFe–yCr alloys with × = 37.4 – 41.4 at.%, y = 7.6 – 8.6 at.% were subjected to long term annealing experiments at 950 8C after oxygenation. The phases were identified and characterized using scanning electron microscopy, X-ray diffraction and wavelength dispersive spectroscopy. In the pure Nb-37Fe-8Cr and Nb-41Fe-9Cr alloys respectively a two phase equilibrium between (Nb) and l FeNb and a three phase equilibrium between (Nb), l FeNb and Fe2Nb are established. In the oxygenated alloys a Ti2Ni type phase with composition (Fe, Cr)6Nb6Ox appears mainly at the expense of the l FeNb phase. With respect to composition and crystallographic parameters the (Fe, Cr)6Nb6Ox phase has large similarities with the Fe2.4Nb3.6O and Fe6Nb6O phase. From wavelength dispersive spectroscopy measurements, it is concluded that × equals 0.75 when (Fe, Cr)6Nb6Ox is in equilibrium with (Nb), l FeNb and Fe2Nb. × is higher when this phase is in equilibrium with NbO. The structure of (Fe, Cr)6Nb6Ox is also analyzed with Rietveld refinement. This analysis reveals that Cr atoms partially replace Fe atoms only on the 16d site and not on the 32e site.

Keywords: Intermetallic compounds; Non-binary oxides; Phase diagrams; Electron microprobe; X-ray diffraction
* Correspondence address, Dr. ir. Annelies Malfliet, Katholieke Universiteit Leuven, Department of Metallurgy and Material Engineering, Kasteelpark Arenberg 44 – Box 2450, B-3001 Heverlee (Belgium), Tel.: +32 16 321279, Fax: +32 16 321991, E-mail:

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Received: 2009-8-13
Accepted: 2010-10-27
Published Online: 2013-06-11
Published in Print: 2011-01-01

© 2011, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial January 2011
  5. Short Communications
  6. Observation of stacking faults in a scanning electron microscope by electron channelling contrast imaging
  7. Original Contributions
  8. Experimental investigation and thermodynamic calculation of the Fe–Mg–Mn and Fe–Mg–Ni systems
  9. Critical investigation of high temperature gas nitriding of a PM tool steel
  10. Tracing the growth rate changes during vertical directional solidification by electrical resistance measurements
  11. Microstructure and properties of hard magnetic FeCr30Co8 alloy subjected to plastic deformation by complex loading
  12. Microstructural evolution through hot working of the single-phase and two-phase Ti-6Al-4V alloy
  13. Tensile properties of ultrafine grained Mg-3%Al alloy studied at elevated temperature
  14. Microstructural evolution and mechanical properties of Cu-10Cr-0.4Zr filamentary in-situ composites
  15. Al–Fe alloy formation by aluminium underpotential deposition from AlCl3 + NaCl melts on iron substrate
  16. A new approach to monitoring thermal fatigue cracks in die casting moulds
  17. The ability of cast composite technology to enhance ductility of wrought magnesium and alloys
  18. Hot rolling of binary Ti–Nb alloys Part 1: evolution of microstructure and texture
  19. Thermochemical investigations in the tin–phosphorus system*
  20. Luminescence properties of Tb3+-activated silicate glass scintillator
  21. (Fe, Cr)6Nb6Ox phase of the filled Ti2Ni type with × ± 0.75 in the quaternary Cr–Fe–Nb–O system
  22. DGM News
  23. DGM News
https://doi.org/10.3139/146.110445
Schlagwörter für diesen Artikel
Intermetallic compounds; Non-binary oxides; Phase diagrams; Electron microprobe; X-ray diffraction

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial January 2011
  5. Short Communications
  6. Observation of stacking faults in a scanning electron microscope by electron channelling contrast imaging
  7. Original Contributions
  8. Experimental investigation and thermodynamic calculation of the Fe–Mg–Mn and Fe–Mg–Ni systems
  9. Critical investigation of high temperature gas nitriding of a PM tool steel
  10. Tracing the growth rate changes during vertical directional solidification by electrical resistance measurements
  11. Microstructure and properties of hard magnetic FeCr30Co8 alloy subjected to plastic deformation by complex loading
  12. Microstructural evolution through hot working of the single-phase and two-phase Ti-6Al-4V alloy
  13. Tensile properties of ultrafine grained Mg-3%Al alloy studied at elevated temperature
  14. Microstructural evolution and mechanical properties of Cu-10Cr-0.4Zr filamentary in-situ composites
  15. Al–Fe alloy formation by aluminium underpotential deposition from AlCl3 + NaCl melts on iron substrate
  16. A new approach to monitoring thermal fatigue cracks in die casting moulds
  17. The ability of cast composite technology to enhance ductility of wrought magnesium and alloys
  18. Hot rolling of binary Ti–Nb alloys Part 1: evolution of microstructure and texture
  19. Thermochemical investigations in the tin–phosphorus system*
  20. Luminescence properties of Tb3+-activated silicate glass scintillator
  21. (Fe, Cr)6Nb6Ox phase of the filled Ti2Ni type with × ± 0.75 in the quaternary Cr–Fe–Nb–O system
  22. DGM News
  23. DGM News
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