Picosecond Laser Micro-welded Similar and Dissimilar Material

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Abstract

We report the successful picoseconds laser welding of a range of similar and dissimilar materials. The welds are formed by a tightly focused 1030 nm, 5.9 ps, 400 kHz laser system which induces microplasma formation. With suitably well prepared samples the plasma is confined and re-solidifies into a weld. Due to the speed of the interaction time between laser and material the heat affected zone is restricted to a few 100 µm around the weld making it an essentially cold process. We specifically report the capability to weld fused silica, borosilicate and sapphire to aluminium, copper, stainless steel, silicon and silicon carbide. Analysis of material mobility in fused silica welds has been investigated through confocal fluorescent microscopy of an Nd doped sample welded to an undoped sample. The results indicate limited mobility in the head affected zone but high mobility in the microplasma region. While the process requires significant surface preparation (Ra < 60nm) the versatility of the process allows a wide range of materials to be welded with essentially the same laser system.
Original languageEnglish
Title of host publicationProceedings of LPM2014 - the 15th International Symposium on Laser Precision Microfabrication
Publication statusPublished - 2014
Event15th International Symposium on Laser Precision Microfabrication 2014 - Radisson BLU Hotel Lietuva, Vilnius, Lithuania
Duration: 17 Jun 201420 Jun 2014

Conference

Conference15th International Symposium on Laser Precision Microfabrication 2014
CountryLithuania
CityVilnius
Period17/06/1420/06/14

Keywords

  • microwelding
  • Picosecond
  • Ultrafast
  • material processing

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  • Cite this

    Carter, R., Chen, J., Shephard, J. D., Thomson, R. R., & Hand, D. P. (2014). Picosecond Laser Micro-welded Similar and Dissimilar Material. In Proceedings of LPM2014 - the 15th International Symposium on Laser Precision Microfabrication