Femtosecond Laser Surface Micro- and Nanotexturing …
247
Fig. 7 SEM images with different magnifications of unpolished surface of zirconium ceramics
treated with femtosecond laser with the wavelength of 800 nm at scanning velocity of 1 mm/s
a, b at pulse irradiation energy density of 1.13 J/cm 2 ; c, d at pulse irradiation energy density of
0.65 J/cm 2
processing mode is rather gentle but precise treatment without producing mechanical
degradation of the material.
An analysis of the morphology of obtained structures on polished and unpolished
zirconia ceramics reveals in the laser-modified parts of the samples the features that
resemble pores, cavities, and tracks of initial processing. Diameters of cavities are
in the range of 240–600 nm. At nanoscale range, the fine ripples of 120–140 nm in
diameter are observed. Femtosecond laser processing of the polished zirconia surface
can also lead to the smoothing of the surface, as well as to the formation of cavities
with a complex nanostructure inside (see Fig. 8c, d).
247
Fig. 7 SEM images with different magnifications of unpolished surface of zirconium ceramics
treated with femtosecond laser with the wavelength of 800 nm at scanning velocity of 1 mm/s
a, b at pulse irradiation energy density of 1.13 J/cm 2 ; c, d at pulse irradiation energy density of
0.65 J/cm 2
processing mode is rather gentle but precise treatment without producing mechanical
degradation of the material.
An analysis of the morphology of obtained structures on polished and unpolished
zirconia ceramics reveals in the laser-modified parts of the samples the features that
resemble pores, cavities, and tracks of initial processing. Diameters of cavities are
in the range of 240–600 nm. At nanoscale range, the fine ripples of 120–140 nm in
diameter are observed. Femtosecond laser processing of the polished zirconia surface
can also lead to the smoothing of the surface, as well as to the formation of cavities
with a complex nanostructure inside (see Fig. 8c, d).