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Analysis of tantalum coatings produced by the kinetic spray process

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Abstract

Tantalum (Ta) coatings have been produced using a relatively new process, kinetic spray. Ta starting powders having particle diameters greater than 65 µm are injected into a de Laval-type nozzle, entrained in a supersonic gas stream, and accelerated to high velocities due to drag effects. The particles’ kinetic energy is transformed via plastic deformation into strain and heat on impact with the substrate surface. Particles are not thermally softened or melted, producing relatively low oxide, reduced residual stress, high adhesion and low porosity coatings. Analysis of the mechanical and physical properties of these Ta coatings demonstrated increasing hardness, cohesive adhesion, and decreasing porosity as a function of particle velocity. Comparison between kinetically sprayed coatings and coatings produced using conventional coating methods will be discussed.

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  1. Delphi Research Laboratories, 48315, Shelby Township, MI

    T. Van Steenkiste & D. W. Gorkiewicz

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  1. T. Van Steenkiste
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  2. D. W. Gorkiewicz
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Van Steenkiste, T., Gorkiewicz, D.W. Analysis of tantalum coatings produced by the kinetic spray process. J Therm Spray Tech 13, 265–273 (2004). https://doi.org/10.1361/10599630419418

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  • DOI: https://doi.org/10.1361/10599630419418

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