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Cold Spraying of Ti2AlC MAX-Phase Coatings

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Abstract

Cold spraying was applied to deposit Ti2AlC on different substrate materials. The study of single impacts by scanning electron microscopy indicates that bonding of the first layer is mainly attributed to the deformation and shear instabilities occurring at substrate sites. Nevertheless, as compared to the feedstock particles, the splats appear flattened by the impact. This deformation seems to be attributed not only to local, internal shear but also to internal fracture. By applying up to five passes under optimized spray parameters, Ti2AlC-coatings with thicknesses of about 110-155 μm were achieved. XRD analysis of the coating proved that the crystallographic structure of the feedstock was retained during cold spraying. The coating microstructures show rather low porosity of about <2%, but several cracks between spray layers. Successful build-up of more than one layer can probably be attributed to local deformation of the highly anisotropic Ti2AlC-phase.

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Acknowledgments

The authors would like to thank the laboratory staff, in alphabetical order Thomas Breckwoldt, Dieter Müller, Norbert Németh, Camilla Schulze, Matthias Schulze, and Uwe Wagener for their support in the presented work.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Helmut Schmidt University, Hamburg, Germany

    H. Gutzmann, F. Gärtner & T. Klassen

  2. Department of Corrosion and Magnesium Surface Technology, Helmholtz-Zentrum Geesthacht GmbH, Geesthacht, Germany

    D. Höche & C. Blawert

  3. Institute for Materials Research, Centre for Materials and Coastal Research GmbH, Helmholtz-Zentrum Geesthacht GmbH, Hamburg, Germany

    T. Klassen

Authors
  1. H. Gutzmann
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  2. F. Gärtner
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  3. D. Höche
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  4. C. Blawert
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  5. T. Klassen
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Corresponding author

Correspondence to F. Gärtner.

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Gutzmann, H., Gärtner, F., Höche, D. et al. Cold Spraying of Ti2AlC MAX-Phase Coatings. J Therm Spray Tech 22, 406–412 (2013). https://doi.org/10.1007/s11666-012-9843-1

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  • DOI: https://doi.org/10.1007/s11666-012-9843-1

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