Femtosecond laser nanostructuring of metals: sub100-nm one-dimensional surface gratings

One-dimensional quasi-periodic structures whose period is much smaller than the wavelength of exciting optical radiation have been obtained on a titanium surface under the multi-shot action of linearly polarized femtosecond laser radiation at various surface energy densitiesyesBelgorod State Universit

Ultrafast changes in the optical properties of a titanium surface and femtosecond laser writing of one-dimensional quasi-periodic nanogratings of its relief

One-dimensional quasi-periodic nanogratings with spacings in the range from 160 to 600 nm are written on a dry or wet titanium surface exposed to linearly polarized femtosecond IR and UV laser pulses with different surface energy densitiesye

Formation of periodic nanostructures on aluminum surface by femtosecond laser pulses

One-dimensional periodic nanostructures have been produced on the surface of an aluminum specimen using femtosecond laser pulses at wavelengths of 744 and 248 nm. The nanostructurization of the specimen has been conducted in water and in air in the preablation regime. We investigate the dependence that the surface topology has on the parameters of laser radiation, as well as on the medium in contact with the specimen surfaceye

Evolution of black silicon nano- and micro-scale surface topologies upon femtosecond laser irradiation

Gradual evolution of silicon surface topology from one-dimensional to two-dimensional nanogratings and then to isotropic sets of nanospikes was observed by increasing IR and UV femtosecond laser irradiation dose (the variable number of incident laser pulses at the constant laser fluence). The fundamental mechanisms of these topological transformations are discussedyesBelgorod State Universit

Topological evolution of self-induced silicon nanogratings during prolonged femtosecond laser irradiation

Gradual evolution of self-induced silicon surface topology from one-dimensional ridge-like to twodimensional spike-like nanogratings and then to isotropic sets of micro-columns was observed by evenly increasing IR and UV femtosecond laser irradiation doseye

Structure and corrosion properties of stainless steel after high-power ion beam processing

In this study, the surfaces of AISI 321 stainless steel samples were irradiated with one shot of a high-power ion beam (HPIB) at pulse energy densities of 1 and 3 J/cm2. The surface morphology and structural-phase state in the near-surface layers of the treated samples were analyzed using scanning electron microscopy and electron backscatter diffraction. Additionally, the influence of HPIB processing on the resistance to intergranular corrosion was investigated using electrochemical experiment

Study of the structure of crater at the surface of 12Cr18Ni10Ti steel irradiated by high-power pulsed ion beam

The topography of surface layers of 12Cr18Ni10Ti (AISI 321) steel after pulsed high-power Cn+ ion beams irradiation was investigated by scanning electron microscopy. A thin foil was prepared from the cross section of a crater with the use of a focused ion beam in the column of a two-beam electron-ion microscope. The microstructure and chemical composition of the crater were studied by transmission electron microscop

Effect of high-power ion beams on the surface topography and structure of the subsurface layer of sun microcrystalline titanium alloys

A rather homogeneous grain structure with equiaxial grains is formed for both alloys already after the effect of one pulse of the high-power ion bea

Study of craters formed on surface of AISI 321 stainless steel after high power ion-beam exposure

Based on the applied processing parameters, it is established that titanium sulfide or titanium carbosulfide inclusions are the preferred crater sites. Furthermore, the crater structure is examined through electron backscatter diffraction analysis. The structure and phase composition of the craters formed on steel as a result of exposure to a pulsed ion beam do not differ from the structural-phase state of the crater-free region

Effect of pulsed soft X-ray radiation on the surface topography of some metals

Effect of the pulsed soft X-ray fluxes (PSXF) on the surface topography of metals (Mg and Cu) has been investigated. Soft pulse X-ray irradiation (energy quanta of 0.1-1.0 keV) were carried out on a high-current MIG generator. The sample of magnesium was located at a distance of 10 cm from the X-ray source. Since the distance to the sample significantly exceeded the size of the X-ray beam, it can be assumed that the density of the X-ray radiation flow to the magnesium sample was unifor