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Nanoporous surfaces via impact of molten metallic droplets

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Abstract

Here we describe a new pathway for the production of nanoporous surfaces, by recourse to molten droplet impact and solidification. The nanopores in this case are frozen in bubbles that nucleate in the melt due to gas supersaturation within 100 nanoseconds of impact. Initial observations and previous analysis are presented, as well as ongoing work to control or pattern porosity via process variation and substrate pre-treatment. This method is presumably not limited in material, and has potential to create large area, functional surfaces.

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Author notes

  1. Meng Qu

    Present address: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA

Authors and Affiliations

  1. Center for Thermal Spray Research, State University of New York at Stony Brook, Stony Brook, NY, USA

    Jose R. Colmenares & Alfredo Valarezo

  2. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA

    Andrew Gouldstone

Authors
  1. Meng Qu
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  2. Jose R. Colmenares
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  3. Alfredo Valarezo
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  4. Andrew Gouldstone
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Corresponding author

Correspondence to Andrew Gouldstone.

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Qu, M., Colmenares, J.R., Valarezo, A. et al. Nanoporous surfaces via impact of molten metallic droplets. Appl. Phys. A 96, 391–397 (2009). https://doi.org/10.1007/s00339-009-5192-4

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  • DOI: https://doi.org/10.1007/s00339-009-5192-4

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