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2. Material surface modification by ns, ps and fs laser pulses

Author

Krmpot A Krmpot A, Stasic J Stasic J, Petrovic S Petrovic S, Jelenkovic B Jelenkovic B, Radak B B Radak B B, Gakovic B M Gakovic B M, Batani D Batani D, Trtica M S Trtica M S, Milovanovic D Milovanovic D, and Tarasenko V F Tarasenko V F

Subjects
Materials science, business.industry, Metallurgy, chemistry.chemical_element, Plasma, Conical surface, engineering.material, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, chemistry, Coating, law, engineering, Surface modification, Optoelectronics, Irradiation, Tin, Inconel, business
Abstract

The laser surface modifications of a bulk material Inconel 600 and a multilayered titanium-aluminium-nitride/titanium-nitride(TiAlN/TiN) coating are of great interest for fundamental and practical aspects.Observation of surface changes of the Inconel 600 and TiAlN/TiN induced by ultra-short(fs and ps) and short(ns) lasers is considered.It is shown that all laser systems can stimulate morphological changes at the target surface,and the irradiation with ultra-short pulses results in a better definition of the damage.Fs laser pulses can produce a sharper destruction in comparison to the ps pulses and it gives the conical cross section of the crater,which is in contrast to the semispherical shapes ps laser beams.Furthermore,thermal effects are dominant in the case of ns pulse,and all irradiations are accompanied by the plasma.

Published
2011
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4. Material surface modification by ns, ps and fs laser pulses

Author

TRTICA M S, TRTICA M S, primary, GAKOVIC B M, GAKOVIC B M, additional, RADAK B B, RADAK B B, additional, BATANI D, BATANI D, additional, TARASENKO V F, TARASENKO V F, additional, PETROVIC S, PETROVIC S, additional, STASIC J, STASIC J, additional, MILOVANOVIC D, MILOVANOVIC D, additional, KRMPOT A, KRMPOT A, additional, and JELENKOVIC B, JELENKOVIC B, additional

Published
2011
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5. Material Surface Modification by nano-, pico- and femto- second Laser Pulses

Author

Trtica, Milan, Gaković, Biljana, Radak, B. B., Batani, Dimitri, Tarasenko, V. F., Petrović, S., Stašić, Jelena, Milovanović, D., Krmpot, Aleksandar, Jelenković, Branislav, Trtica, Milan, Gaković, Biljana, Radak, B. B., Batani, Dimitri, Tarasenko, V. F., Petrović, S., Stašić, Jelena, Milovanović, D., Krmpot, Aleksandar, and Jelenković, Branislav

Published
2010

10. Ionization energies of K2X (X=F, Cl, Br, I) clusters.

Author

Veličković SR, Veljković FM, Perić-Grujić AA, Radak BB, and Veljković MV

Abstract

The electronic structure and properties of dipotassiummonohalides are important for understanding the unique physical and chemical behavior of M(n)X systems. In the present study, K(2) X (here X=F, Cl, Br, I) clusters were generated in the vapor over salts of the corresponding potassium halide, using a magnetic sector thermal ionization mass spectrometer. The ionization energies obtained for K(2)F, K(2)Cl, K(2)Br, and K(2)I molecules were 3.82 ± 0.1 eV, 3.68 ± 0.1 eV, 3.95 ± 0.1 eV, and 3.92 ± 0.1, respectively. These experimental values of ionization energies for K(2) X (X=F, Br, and I) are presented for the first time. The ionization energy of K(2)Cl determined by thermal ionization corresponds to previous results obtained by photoionization mass spectrometry, and it agrees with the theoretical ionization energy calculated by the ab initio method. The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters., (Copyright © 2011 John Wiley & Sons, Ltd.)

Published
2011
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