Journal of Thermal Spray Technology

, Volume 21, Issue 3–4, pp 441–447

Deposition of La1−xSrxFe1−yCoyO3−δ Coatings with Different Phase Compositions and Microstructures by Low-Pressure Plasma Spraying-Thin Film (LPPS-TF) Processes

  • N. Zotov
  • A. Hospach
  • G. Mauer
  • D. Sebold
  • R. Vaßen
Peer Reviewed

Abstract

Perovskite-type materials with the general chemical formula A1−xA′xB1−yB′yO3−δ have received considerable attention as candidates for oxygen separation membranes. Preparation of La1−xSrxFe1−yCoyO3−δ (LSFC) coatings by low-pressure plasma spraying-thin film processes using different plasma spray parameters is reported and discussed. Deposition with Ar-He plasma leads to formation of coatings containing a mixture of cubic LSFC perovskite, SrLaFeO4, FeCo, and metal oxides. Coatings deposited at higher oxygen partial pressures by pumping oxygen into the vacuum chamber contain more than 85% perovskite and only a few percent Fe3−xCoxO4, and/or CoO. The microstructures of the investigated LSFC coatings depend sensitively on the oxygen partial pressure, the substrate temperature, the plasma jet velocities, and the deposition rate. Coatings deposited with Ar-rich plasma, relatively low net torch power, and with higher plasma jet velocities are most promising for applications as oxygen permeation membranes.

Keywords

low pressure plasma spraying-thin film (LPPS-TF) LSFC oxygen permeation membranes plasma jet velocities x-ray diffraction 

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Copyright information

© ASM International 2012

Authors and Affiliations

  • N. Zotov
    • 1
  • A. Hospach
    • 1
  • G. Mauer
    • 1
  • D. Sebold
    • 1
  • R. Vaßen
    • 1
  1. 1.IEK-1, Forschungszentrum Jülich GmbHJülichGermany

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