Laser Surface nanotexturing for INDUSTRIAL applications

Laser Surface nanotexturing for INDUSTRIAL applications
The method we are proposing permits the nanotexturing virtually all kind of surfaces. It employs femtosecond laser to generate pattern with periods between 400 and 700 nm working with Infrared Lasers ( about 1030 nm ). Moreover secondary structures with periods well below 100 nm can be generated. A proportional decreasing in the periods is expected by switching to green or UV lasers. Our experiences were mainly performed on pure metals and metal alloy ( steels, stainless steels, titanium, nickel, molybdenum, gold, aluminum, copper, tungsten, ... ) dielectric and semiconductors ( ITO, silicon, sapphire ) and almost all kind of industrial coatings.

Process rate in laboratory condition: 200 mm^2 / min ( theorical max rate 5000 mm^2/min ), no vacuum required.

Demostrated applications of Laser nanotexturing:

• Coefficient of Friction and wear improvement on stainless steels

• Flow control in plastic injection

• Hydrophobic and hydrophilic induced surfaces

• Anisotropic wettability

Other possible applications:

• microfluidic

• optical waveguides

• THz generation

• oleodynamic

• advance marking and anticounterfeiting

Publications:

1. M. Sorgato, D. Masato, G. Lucchetta, L. ORAZI “Effect of different laser-induced periodic surface structures on polymer slip in PET injection moulding” CIRP ANNALS 2018, vol 67, 2018

2. I. Gnilitskyi, T. J. Y. Derrien, Y. Levy, N. M. Bulgakova, T. Mocek, and L. ORAZI, “High-speed manufacturing of highly regular femtosecond laser- induced periodic surface structures: Physical origin of regularity,” SCIENTIFIC REPORTS, vol. 7, pp. 1–11, 2017.

3. L. ORAZI, I. Gnilitskyi, and A. P. Serro, “Laser nanopatterning for wettability applications,” JOURNAL OF MICRO- AND NANO- MANUFACTURING, vol. 5, pp. 021008–021016, 2017.

4. G. Rotella, L. ORAZI, M. Alfano, S. Candamano, and I. Gnilitskyi, “Innovative high-speed femtosecond laser nano-patterning for improved adhesive bonding of ti6al4v titanium alloy,” CIRP - JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY, vol. 18, pp. 101–106, 2017.

5. I. Gnilitskyi et al. "Nano patterning of AISI 316L stainless steel with Nonlinear Laser Lithography: Sliding under dry and oil-lubricated conditions" Tribology International, Volume 99, July 2016, pp. 67-76

6. L. ORAZI, I. Gnilitskyi, I. Pavlov, A. P. Serro, S. Ilday, and F. O. Ilday, “Nonlinear laser lithography to control surface properties of stainless steel,” CIRP ANNALS, vol. 65, pp. 193–196, 2015.