TY  - JOUR
AU  - Petrović, Suzana M
AU  - Perusko, Davor B
AU  - Radovic-Bogdanović, I
AU  - Branković, Goran
AU  - Cekada, M
AU  - Gaković, Biljana M
AU  - Jaksic, M
AU  - Trtica, Milan S
AU  - Milosavljević, Momir S
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/532
AB  - In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.
PB  - Korean Inst Metals Materials, Seoul
T2  - Metals and Materials International
T1  - Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser
EP  - 463
IS  - 3
SP  - 457
VL  - 18
DO  - 10.1007/s12540-012-3012-4
ER  - 

@article{
author = "Petrović, Suzana M and Perusko, Davor B and Radovic-Bogdanović, I and Branković, Goran and Cekada, M and Gaković, Biljana M and Jaksic, M and Trtica, Milan S and Milosavljević, Momir S",
year = "2012",
abstract = "In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.",
publisher = "Korean Inst Metals Materials, Seoul",
journal = "Metals and Materials International",
title = "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser",
pages = "463-457",
number = "3",
volume = "18",
doi = "10.1007/s12540-012-3012-4"
}

Petrović, S. M., Perusko, D. B., Radovic-Bogdanović, I., Branković, G., Cekada, M., Gaković, B. M., Jaksic, M., Trtica, M. S.,& Milosavljević, M. S.. (2012). Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International
Korean Inst Metals Materials, Seoul., 18(3), 457-463.
https://doi.org/10.1007/s12540-012-3012-4

Petrović SM, Perusko DB, Radovic-Bogdanović I, Branković G, Cekada M, Gaković BM, Jaksic M, Trtica MS, Milosavljević MS. Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International. 2012;18(3):457-463.
doi:10.1007/s12540-012-3012-4 .

Petrović, Suzana M, Perusko, Davor B, Radovic-Bogdanović, I, Branković, Goran, Cekada, M, Gaković, Biljana M, Jaksic, M, Trtica, Milan S, Milosavljević, Momir S, "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser" in Metals and Materials International, 18, no. 3 (2012):457-463,
https://doi.org/10.1007/s12540-012-3012-4 . .

TY  - JOUR
AU  - Stasic, J.
AU  - Trtica, Milan S
AU  - Gaković, B.
AU  - Batani, D.
AU  - Desai, T.
AU  - Branković, Goran
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/329
AB  - Interaction of Nd:YAG laser, operating at 266 nm wavelength and a pulse duration of 40 ps, with AISI 1045 steel was studied. Surface damage threshold was estimated to be 0.14 J/cm(2). The steel surface modi. cation was studied at the laser fluence of similar to 1.0 J/cm(2). The energy absorbed from Nd: YAG laser beam is partially converted to thermal energy, which generates a series of effects, such as melting, vaporization of the molten material, shock waves, etc. The following AISI 1045 steel surface morphological changes and processes were observed: (i) intensive damage of the target in the central zone of irradiated area; (ii) appearance of periodic surface structures at nano-level, with periodicity in agreement with the used wavelength; (iii) reduction of oxygen concentration in irradiated area; and (iv) development of plasma in front of the target. Generally, interaction of laser beam with AISI 1045 steel (at 266 nm) results in a near-instantaneous creation of damage, meaning that large steel surfaces can be modified in short times.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses
EP  - 8225
IS  - 19
SP  - 8221
VL  - 255
DO  - 10.1016/j.apsusc.2009.05.049
ER  - 

@article{
author = "Stasic, J. and Trtica, Milan S and Gaković, B. and Batani, D. and Desai, T. and Branković, Goran",
year = "2009",
abstract = "Interaction of Nd:YAG laser, operating at 266 nm wavelength and a pulse duration of 40 ps, with AISI 1045 steel was studied. Surface damage threshold was estimated to be 0.14 J/cm(2). The steel surface modi. cation was studied at the laser fluence of similar to 1.0 J/cm(2). The energy absorbed from Nd: YAG laser beam is partially converted to thermal energy, which generates a series of effects, such as melting, vaporization of the molten material, shock waves, etc. The following AISI 1045 steel surface morphological changes and processes were observed: (i) intensive damage of the target in the central zone of irradiated area; (ii) appearance of periodic surface structures at nano-level, with periodicity in agreement with the used wavelength; (iii) reduction of oxygen concentration in irradiated area; and (iv) development of plasma in front of the target. Generally, interaction of laser beam with AISI 1045 steel (at 266 nm) results in a near-instantaneous creation of damage, meaning that large steel surfaces can be modified in short times.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses",
pages = "8225-8221",
number = "19",
volume = "255",
doi = "10.1016/j.apsusc.2009.05.049"
}

Stasic, J., Trtica, M. S., Gaković, B., Batani, D., Desai, T.,& Branković, G.. (2009). Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses. in Applied Surface Science
Elsevier, Amsterdam., 255(19), 8221-8225.
https://doi.org/10.1016/j.apsusc.2009.05.049

Stasic J, Trtica MS, Gaković B, Batani D, Desai T, Branković G. Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses. in Applied Surface Science. 2009;255(19):8221-8225.
doi:10.1016/j.apsusc.2009.05.049 .

Stasic, J., Trtica, Milan S, Gaković, B., Batani, D., Desai, T., Branković, Goran, "Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses" in Applied Surface Science, 255, no. 19 (2009):8221-8225,
https://doi.org/10.1016/j.apsusc.2009.05.049 . .