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Laser Remelting of Plasma-Sprayed Tungsten Coatings

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Abstract

Laser surface melting was applied on plasma-sprayed tungsten coatings, with the aim to eliminate intersplat voids and improve thermal conductivity. A variety of laser parameters was tested and the morphology and melt depth were evaluated. With the most promising conditions, 2D areas were remelted and thermal conductivity was determined. Improvements in conductivity were observed, but the depth of the remelted layer was quite limited under current conditions. Advantages and limitations of this method, as well as possible directions for improvement are discussed.

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Acknowledgments

This work has been carried out within the framework of the Integrated European Project “ExtreMat” (contract NMP-CT-2004-500253) with financial support from the European Community. It reflects the views of the authors only and the European Community is not liable for any use of the information contained herein. Financial support from the Czech Science Foundation though grant no. P108/12/1872 for the final characterization is also acknowledged.

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Authors and Affiliations

  1. Institute of Plasma Physics, Za Slovankou 3, 182 00, Praha, Czech Republic

    Jiří Matějíček

  2. Indet Safety Systems, Bobrky 462, 755 01, Vsetín, Czech Republic

    Petr Holub

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  1. Jiří Matějíček
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  2. Petr Holub
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Correspondence to Jiří Matějíček.

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Matějíček, J., Holub, P. Laser Remelting of Plasma-Sprayed Tungsten Coatings. J Therm Spray Tech 23, 750–754 (2014). https://doi.org/10.1007/s11666-014-0067-4

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  • DOI: https://doi.org/10.1007/s11666-014-0067-4

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