TY  - CONF
AU  - Laketić, Slađana
AU  - Rakin, Marko
AU  - Momčilović, Miloš
AU  - Ciganović, Jovan
AU  - Veljović, Đorđe
AU  - Cvijović, Ivana
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6009
AB  - Titanium alloys are finding increasing use as biomaterials due to their low elastic modulus and high damage tolerance. However, the somewhat inadequate alloy surface performance can impede their biomedical application. Surface modification methods have been therefore developed to improve the alloys' surface bioactivity and osseointegration. Laser treatment allows the alloy surface to be modified, providing it with new functionalized surface chemistry and morphology, without compromising the rest of the material properties. Thus, the aim of the study was to examine the laser-induced alterations generated on the Ti-45Nb alloy surface by an ultrashort pulsed laser. The obtained results reveal that laser beam interaction with the target material led to the formation of significant alterations in surface morphology. Surface craters, microcracks, and surface features in the form of periodic and rippled structures and solidified droplets can be observed in the irradiated area. Also, it was found that the higher damage degree along with the material depth and the higher surface roughness were achieved during the irradiation in the argon atmosphere due to the formation of the more pronounced morphological changes on the alloy surface that are induced by higher laser ablation. Furthermore, obtained results showed that alloy surface modification in air, argon, and nitrogen atmosphere additionally caused changes in the surface chemical composition. Namely, after irradiation, the presence of oxygen was observed in the central irradiated area indicating the formation of bioactive Ti-oxide surface film with content that varies with the irradiation parameters variation. Therefore, laser beam irradiation can be singled out as the surface modification method for efficient inducement of the specific surface characteristics that can provide titanium alloys with enhanced osseointegration properties.
PB  - Materials Research Society of Serbia – MRS-Serbia
C3  - TWENTY THIRD ANNUAL CONFERENCE - YUCOMAT
T1  - Laser-induced chemical and mophological changes of the titanium alloy surface under different irradiation parameters
SP  - 92
VL  - XLV
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6009
ER  - 

@conference{
author = "Laketić, Slađana and Rakin, Marko and Momčilović, Miloš and Ciganović, Jovan and Veljović, Đorđe and Cvijović, Ivana",
year = "2022",
abstract = "Titanium alloys are finding increasing use as biomaterials due to their low elastic modulus and high damage tolerance. However, the somewhat inadequate alloy surface performance can impede their biomedical application. Surface modification methods have been therefore developed to improve the alloys' surface bioactivity and osseointegration. Laser treatment allows the alloy surface to be modified, providing it with new functionalized surface chemistry and morphology, without compromising the rest of the material properties. Thus, the aim of the study was to examine the laser-induced alterations generated on the Ti-45Nb alloy surface by an ultrashort pulsed laser. The obtained results reveal that laser beam interaction with the target material led to the formation of significant alterations in surface morphology. Surface craters, microcracks, and surface features in the form of periodic and rippled structures and solidified droplets can be observed in the irradiated area. Also, it was found that the higher damage degree along with the material depth and the higher surface roughness were achieved during the irradiation in the argon atmosphere due to the formation of the more pronounced morphological changes on the alloy surface that are induced by higher laser ablation. Furthermore, obtained results showed that alloy surface modification in air, argon, and nitrogen atmosphere additionally caused changes in the surface chemical composition. Namely, after irradiation, the presence of oxygen was observed in the central irradiated area indicating the formation of bioactive Ti-oxide surface film with content that varies with the irradiation parameters variation. Therefore, laser beam irradiation can be singled out as the surface modification method for efficient inducement of the specific surface characteristics that can provide titanium alloys with enhanced osseointegration properties.",
publisher = "Materials Research Society of Serbia – MRS-Serbia",
journal = "TWENTY THIRD ANNUAL CONFERENCE - YUCOMAT",
title = "Laser-induced chemical and mophological changes of the titanium alloy surface under different irradiation parameters",
pages = "92",
volume = "XLV",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6009"
}

Laketić, S., Rakin, M., Momčilović, M., Ciganović, J., Veljović, Đ.,& Cvijović, I.. (2022). Laser-induced chemical and mophological changes of the titanium alloy surface under different irradiation parameters. in TWENTY THIRD ANNUAL CONFERENCE - YUCOMAT
Materials Research Society of Serbia – MRS-Serbia., XLV, 92.
https://hdl.handle.net/21.15107/rcub_technorep_6009

Laketić S, Rakin M, Momčilović M, Ciganović J, Veljović Đ, Cvijović I. Laser-induced chemical and mophological changes of the titanium alloy surface under different irradiation parameters. in TWENTY THIRD ANNUAL CONFERENCE - YUCOMAT. 2022;XLV:92.
https://hdl.handle.net/21.15107/rcub_technorep_6009 .

Laketić, Slađana, Rakin, Marko, Momčilović, Miloš, Ciganović, Jovan, Veljović, Đorđe, Cvijović, Ivana, "Laser-induced chemical and mophological changes of the titanium alloy surface under different irradiation parameters" in TWENTY THIRD ANNUAL CONFERENCE - YUCOMAT, XLV (2022):92,
https://hdl.handle.net/21.15107/rcub_technorep_6009 .

TY  - CONF
AU  - Cvijović-Alagić, Ivana
AU  - Laketić, Slađana
AU  - Momčilović, Miloš
AU  - Ciganović, Jovan
AU  - Veljović, Đorđe
AU  - Rakin, Marko
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6011
AB  - Hard-tissue replacements are most commonly made from the Ti-based materials, such as
commercially pure titanium (CP-Ti) and Ti-6Al-4V (mass%) alloy, because of their exceptional
biocompatible properties combined with the excellent corrosive and mechanical characteristics [1].
More recently, efforts have been made to additionally enhance the properties of the metallic
implants through the careful selection of the alloy composition and surface modification technics
[2,3]. As a result, second-generation β-type Ti alloys, containing non-toxic elements, have been
developed. One of the promising β-type implant alloys is Ti-13Nb-13Zr (mass%). Even though the
corrosion resistance and mechanical properties of this alloy are improved in comparison to the
commonly used metallic implant materials, its biocompatible and osseointegration properties can
and must be additionally enhanced. For that purpose several surface modification technics can be
used, however, laser irradiation stands out as the most promising one. Because of that scope of the
present research was to investigate the possibility of successful surface modification of the most
commonly used implant material, i.e. CP-Ti, and the second-generation Ti-13Nb-13Zr alloy by
utilizing the easy-to-apply laser irradiation method in order to obtain improved implant tribocorrosive
properties and enhanced biointegration and bioactivity.
Laser surface modifications were conducted using the Nd:YAG system in the air and argon
atmosphere under different laser output energies. Implant materials surface morphologies after the
laser irradiation treatment were investigated using the field-emission scanning electron microscopy
(FE-SEM) and optical profilometry, while the impact of the laser irradiation on the implant
materials surface characteristics were examined using the energy dispersive spectrometry (EDS)
and microhardness measurements.
Conducted research showed that utilization of the Nd:YAG laser irradiation resulted in significant
alterations of the CP-Ti and Ti-13Nb-13Zr alloy surface chemistry, morphology and microhardness.
Laser irradiation of both investigated materials led to the formation of visible microcracks and
hydrodynamic effects in the central part of the irradiated area, while traces of melted and solidified
material were observed at its periphery. More pronounced morphological changes were induced
during the laser irradiation in an argon atmosphere, while a higher degree of texturing was recorded
at the surface of the Ti-13Nb-13Zr alloy. At the irradiated surfaces, the formation of the oxide layer,
predominantly composed of Ti-oxide particles, was detected. Surface oxides are desirable since
their presence can improve the implant material bioactivity with a simultaneous increase of the
tribo-corrosive properties through the formation of the hard corrosion resistance surface film. Laserinduced
chemical and morphological alterations were more distinctive in the case of the Ti-13Nb-
13Zr alloy.
PB  - Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - 1st International Conference on Innovative Materials in Extreme Conditions (IMEC2022)
T1  - Laser irradiation as an easy-to-apply method for Ti-based implant materials enhancement
SP  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6011
ER  - 

@conference{
author = "Cvijović-Alagić, Ivana and Laketić, Slađana and Momčilović, Miloš and Ciganović, Jovan and Veljović, Đorđe and Rakin, Marko",
year = "2022",
abstract = "Hard-tissue replacements are most commonly made from the Ti-based materials, such as
commercially pure titanium (CP-Ti) and Ti-6Al-4V (mass%) alloy, because of their exceptional
biocompatible properties combined with the excellent corrosive and mechanical characteristics [1].
More recently, efforts have been made to additionally enhance the properties of the metallic
implants through the careful selection of the alloy composition and surface modification technics
[2,3]. As a result, second-generation β-type Ti alloys, containing non-toxic elements, have been
developed. One of the promising β-type implant alloys is Ti-13Nb-13Zr (mass%). Even though the
corrosion resistance and mechanical properties of this alloy are improved in comparison to the
commonly used metallic implant materials, its biocompatible and osseointegration properties can
and must be additionally enhanced. For that purpose several surface modification technics can be
used, however, laser irradiation stands out as the most promising one. Because of that scope of the
present research was to investigate the possibility of successful surface modification of the most
commonly used implant material, i.e. CP-Ti, and the second-generation Ti-13Nb-13Zr alloy by
utilizing the easy-to-apply laser irradiation method in order to obtain improved implant tribocorrosive
properties and enhanced biointegration and bioactivity.
Laser surface modifications were conducted using the Nd:YAG system in the air and argon
atmosphere under different laser output energies. Implant materials surface morphologies after the
laser irradiation treatment were investigated using the field-emission scanning electron microscopy
(FE-SEM) and optical profilometry, while the impact of the laser irradiation on the implant
materials surface characteristics were examined using the energy dispersive spectrometry (EDS)
and microhardness measurements.
Conducted research showed that utilization of the Nd:YAG laser irradiation resulted in significant
alterations of the CP-Ti and Ti-13Nb-13Zr alloy surface chemistry, morphology and microhardness.
Laser irradiation of both investigated materials led to the formation of visible microcracks and
hydrodynamic effects in the central part of the irradiated area, while traces of melted and solidified
material were observed at its periphery. More pronounced morphological changes were induced
during the laser irradiation in an argon atmosphere, while a higher degree of texturing was recorded
at the surface of the Ti-13Nb-13Zr alloy. At the irradiated surfaces, the formation of the oxide layer,
predominantly composed of Ti-oxide particles, was detected. Surface oxides are desirable since
their presence can improve the implant material bioactivity with a simultaneous increase of the
tribo-corrosive properties through the formation of the hard corrosion resistance surface film. Laserinduced
chemical and morphological alterations were more distinctive in the case of the Ti-13Nb-
13Zr alloy.",
publisher = "Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "1st International Conference on Innovative Materials in Extreme Conditions (IMEC2022)",
title = "Laser irradiation as an easy-to-apply method for Ti-based implant materials enhancement",
pages = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6011"
}

Cvijović-Alagić, I., Laketić, S., Momčilović, M., Ciganović, J., Veljović, Đ.,& Rakin, M.. (2022). Laser irradiation as an easy-to-apply method for Ti-based implant materials enhancement. in 1st International Conference on Innovative Materials in Extreme Conditions (IMEC2022)
Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 20.
https://hdl.handle.net/21.15107/rcub_technorep_6011

Cvijović-Alagić I, Laketić S, Momčilović M, Ciganović J, Veljović Đ, Rakin M. Laser irradiation as an easy-to-apply method for Ti-based implant materials enhancement. in 1st International Conference on Innovative Materials in Extreme Conditions (IMEC2022). 2022;:20.
https://hdl.handle.net/21.15107/rcub_technorep_6011 .

Cvijović-Alagić, Ivana, Laketić, Slađana, Momčilović, Miloš, Ciganović, Jovan, Veljović, Đorđe, Rakin, Marko, "Laser irradiation as an easy-to-apply method for Ti-based implant materials enhancement" in 1st International Conference on Innovative Materials in Extreme Conditions (IMEC2022) (2022):20,
https://hdl.handle.net/21.15107/rcub_technorep_6011 .