Technological facilities

  • Scanning Electron Microscopy & X-Rays Microanalysis

  • 3D Digital Microscope

  • X-Rays Microtomography

  • Glow Discharge Optical Emission Spectrometry

  • Vibrational spectrometry

  • X-ray diffraction

  • Non-contact surface topography measurements

  • Laser granulometry

  • Microhardness

  • Differential Scanning Calorimetry (DSC)

  • Salt spray chambers


  • Analyses et surface
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    Glow Discharge Optical Emission Spectrometry



    Definition :

    Glow Discharge Optical Emission Spectrometry (GDOES) is used to perform chemical analysis and surface profiles on solid conductive materials.

    Principle :

    A GDOES is made up of a discharge lamp, an optical spectrometer, and a data acquisition & processing system.
    The sample is put on a copper electrode (so the sample is the cathode, the copper the anode).

    The discharge is applied between the anode and the cathode, that triggers off a sample surface erosion. Atoms ejected are then excited by an Argon plasma, and finally come back to their fundamental energy level, emitting a characteristic X photon.

    Emitted photons, whose energy is characteristic of a chemical element’s energy level, are then collected by photomultipliers, that allows to quantify elemental composition of a material.

    Two types of analyses can be performed :
    - surface profile analysis : signal from each chemical element as a function of erosion time
    - bulk analysis : global chemical analysis

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    Principle of the GD-OES analysis
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    WC/C + TiAlN multilayer on steel substrate

    Set-up :

    Jobin Yvon 5000 RF

    Bulk analysis programs : steels, cast irons, stainless steels, aluminum alloys, brazing alloys, copper-aluminum alloys

    Elements detected from Hydrogen

    Detection limits : depending on each program, contact us for more information

    Qualitative programs for all types of conductive samples (up to 10 µm deep).


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