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Träfflista för sökning "WFRF:(Öberg Åke) ;pers:(Lewin Erik)"

Sökning: WFRF:(Öberg Åke) > Lewin Erik

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1.
  • Lauridsen, Jonas, et al. (författare)
  • Deposition of Ti-Si-C-Ag nanocomposite coatings as electrical contact material
  • 2010
  • Ingår i: Proceedings of the 56th IEEE Holm Conference on Electrical Contacts (HOLM). - : IEEE. - 9781424481743 ; , s. 288-294
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • This paper is a brief review of our recent work and a follow up study on nanocomposite coatings comprising nanocrystalline TiC embedded in an amorphous SiC matrix (nc-TiC/a-SiC) with and without Ag additions applied as electrical contacts. These coating materials are deposited at very high deposition rates (>10 μm/h), to meet industrial demands of high productivity. Here we consider Ti-Si-C-Ag nanocomposite coatings with Ag content in the range of 0-22 at.% deposited in a pilot-plant or an industrial deposition system by dc magnetron sputtering from compound targets onto Si(100) and SiO2(100) substrates. The microstructure, electrical, and mechanical properties of the coatings were studied with transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, electrical contact resistance, resistivity, and nanoindentation measurements. Varying the deposition parameters bias and pressure within ranges typical of coating processing had no effect on the structure. A variation was, however, observed for the contact resistance, that was determined to be in the range 400-900 mΩ at a contact force between 1.9-2.65 N. The coatings with highest Ag content had the lowest contactresistance.
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2.
  • Lewin, Erik, et al. (författare)
  • Industrialisation Study of Nanocomposite nc-TiC/a-C Coatings for Electrical Contact Applications
  • 2009
  • Ingår i: Plasma Processes and Polymers. - : WILEY-VCH Verlag GmbH & Co. - 1612-8850. ; 6:S1, s. S928-S934
  • Tidskriftsartikel (refereegranskat)abstract
    • Nanocomposite nc-TiC/a-C coatings were prepared by non-reactive magnetron sputtering in industrial scale equipment, under varying deposition conditions in order to investigate upscaling and possible industrialisation. The coatings were found to have similar microstructure and performance compared to previous laboratory scale experiments. The samples were characterised with XRD, XPS and SEM as well with ball-on-disc, nanoindentation and electrical measurements. Coatings containing a small fraction of a-C matrix phase were found to have promising both electrical properties (rho < 400 mu Omega cm and contact resistances down to 0.34 m Omega at 40 N) and tribological properties (f < 0.3 for 10 000 laps).
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  • Resultat 1-3 av 3

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