Pokusova, Marcela

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orcid::0000-0002-1525-2521
  • Pokusova, Marcela (2)

Author's Bibliography

Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles

Vencl, Aleksandar; Šljivić, Veljko; Pokusova, Marcela; Kandeva, Mara; Sun, HongGuang; Zadorozhnaya, Elena; Bobić, Ilija

(Springer Int Publ Ag, Cham, 2021)

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Šljivić, Veljko
AU  - Pokusova, Marcela
AU  - Kandeva, Mara
AU  - Sun, HongGuang
AU  - Zadorozhnaya, Elena
AU  - Bobić, Ilija
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3615
AB  - The investigated metal-metal composites were produced by the compocasting process using the standard zinc-aluminium alloy ZA-27 as a matrix and titanium microparticles (particle size approx. 10 mu m) as a secondary phase. The amount of Ti microparticles was 1 and 2 wt%. Small amount (0.5 wt%) of alumina nanoparticles (particle size 20-30 nm) is also used, as reinforcement. The aim of the presented research was to evaluate the possibility of producing such composites, as well as to see the effect of the addition of Ti microparticles and/or alumina nanoparticles on their microstructure, mechanical and tribological properties. Microstructure and worn surfaces analysis were performed by scanning electron microscope, and mechanical properties were analysed through the Vickers microhardness values. Tribological properties were determined on tribometer with line contact, under mixed lubrication conditions. Microstructural analysis showed that the distribution of Ti microparticles has been improved due to the addition of Al2O3 nanoparticles. This better distribution did not show any significant influence on the microhardness values or coefficient of friction values of the composites, but it induced higher wear resistance of metal-metal composites reinforced with Al2O3 nanoparticles. Better distribution and higher amount of Ti particles increased the surface area of the matrix that was protected with Ti particles during sliding and reduced wear.
PB  - Springer Int Publ Ag, Cham
T2  - International Journal of Metalcasting
T1  - Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles
EP  - 1411
IS  - 4
SP  - 1402
VL  - 15
DO  - 10.1007/s40962-020-00565-5
ER  - 
@article{
author = "Vencl, Aleksandar and Šljivić, Veljko and Pokusova, Marcela and Kandeva, Mara and Sun, HongGuang and Zadorozhnaya, Elena and Bobić, Ilija",
year = "2021",
abstract = "The investigated metal-metal composites were produced by the compocasting process using the standard zinc-aluminium alloy ZA-27 as a matrix and titanium microparticles (particle size approx. 10 mu m) as a secondary phase. The amount of Ti microparticles was 1 and 2 wt%. Small amount (0.5 wt%) of alumina nanoparticles (particle size 20-30 nm) is also used, as reinforcement. The aim of the presented research was to evaluate the possibility of producing such composites, as well as to see the effect of the addition of Ti microparticles and/or alumina nanoparticles on their microstructure, mechanical and tribological properties. Microstructure and worn surfaces analysis were performed by scanning electron microscope, and mechanical properties were analysed through the Vickers microhardness values. Tribological properties were determined on tribometer with line contact, under mixed lubrication conditions. Microstructural analysis showed that the distribution of Ti microparticles has been improved due to the addition of Al2O3 nanoparticles. This better distribution did not show any significant influence on the microhardness values or coefficient of friction values of the composites, but it induced higher wear resistance of metal-metal composites reinforced with Al2O3 nanoparticles. Better distribution and higher amount of Ti particles increased the surface area of the matrix that was protected with Ti particles during sliding and reduced wear.",
publisher = "Springer Int Publ Ag, Cham",
journal = "International Journal of Metalcasting",
title = "Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles",
pages = "1411-1402",
number = "4",
volume = "15",
doi = "10.1007/s40962-020-00565-5"
}
Vencl, A., Šljivić, V., Pokusova, M., Kandeva, M., Sun, H., Zadorozhnaya, E.,& Bobić, I.. (2021). Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles. in International Journal of Metalcasting
Springer Int Publ Ag, Cham., 15(4), 1402-1411.
https://doi.org/10.1007/s40962-020-00565-5
Vencl A, Šljivić V, Pokusova M, Kandeva M, Sun H, Zadorozhnaya E, Bobić I. Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles. in International Journal of Metalcasting. 2021;15(4):1402-1411.
doi:10.1007/s40962-020-00565-5 .
Vencl, Aleksandar, Šljivić, Veljko, Pokusova, Marcela, Kandeva, Mara, Sun, HongGuang, Zadorozhnaya, Elena, Bobić, Ilija, "Production, microstructure and tribological properties of Zn-Al/Ti metal-metal composites reinforced with alumina nanoparticles" in International Journal of Metalcasting, 15, no. 4 (2021):1402-1411,
https://doi.org/10.1007/s40962-020-00565-5 . .
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Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings

Kandeva, Mara; Svoboda, Petr; Nikolov, N.; Todorov, T.; Sofronov, Y.; Pokusova, Marcela; Vencl, Aleksandar

(Scibulcom Ltd., 2020)

TY  - JOUR
AU  - Kandeva, Mara
AU  - Svoboda, Petr
AU  - Nikolov, N.
AU  - Todorov, T.
AU  - Sofronov, Y.
AU  - Pokusova, Marcela
AU  - Vencl, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3438
AB  - The nickel coatings were produced by electroless plating process, without and with addition of 5-7 vol.% SiC nanoparticles of five different sizes (10, 45, 100, 150 and 700 nm in diameter). Coatings were tested in as-deposited and in heat treated (heating at 300 degrees C for 6 h) condition, with two different surface textures preparation. This type of coatings was previously tested and showed improved abrasive wear resistance. Coefficients of friction testing of electroless nickel coatings in contact with bronze counter-body were determined in ambient air and unlubricated conditions. Static and kinetic coefficient of friction, as well as the difference between them, were analysed and discussed. The influence of size of embedded SiC particles in composite coatings, on tested friction properties of these coatings was also determined.
PB  - Scibulcom Ltd.
T2  - Journal of Environmental Protection and Ecology
T1  - Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings
EP  - 1325
IS  - 4
SP  - 1314
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3438
ER  - 
@article{
author = "Kandeva, Mara and Svoboda, Petr and Nikolov, N. and Todorov, T. and Sofronov, Y. and Pokusova, Marcela and Vencl, Aleksandar",
year = "2020",
abstract = "The nickel coatings were produced by electroless plating process, without and with addition of 5-7 vol.% SiC nanoparticles of five different sizes (10, 45, 100, 150 and 700 nm in diameter). Coatings were tested in as-deposited and in heat treated (heating at 300 degrees C for 6 h) condition, with two different surface textures preparation. This type of coatings was previously tested and showed improved abrasive wear resistance. Coefficients of friction testing of electroless nickel coatings in contact with bronze counter-body were determined in ambient air and unlubricated conditions. Static and kinetic coefficient of friction, as well as the difference between them, were analysed and discussed. The influence of size of embedded SiC particles in composite coatings, on tested friction properties of these coatings was also determined.",
publisher = "Scibulcom Ltd.",
journal = "Journal of Environmental Protection and Ecology",
title = "Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings",
pages = "1325-1314",
number = "4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3438"
}
Kandeva, M., Svoboda, P., Nikolov, N., Todorov, T., Sofronov, Y., Pokusova, M.,& Vencl, A.. (2020). Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings. in Journal of Environmental Protection and Ecology
Scibulcom Ltd.., 21(4), 1314-1325.
https://hdl.handle.net/21.15107/rcub_machinery_3438
Kandeva M, Svoboda P, Nikolov N, Todorov T, Sofronov Y, Pokusova M, Vencl A. Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings. in Journal of Environmental Protection and Ecology. 2020;21(4):1314-1325.
https://hdl.handle.net/21.15107/rcub_machinery_3438 .
Kandeva, Mara, Svoboda, Petr, Nikolov, N., Todorov, T., Sofronov, Y., Pokusova, Marcela, Vencl, Aleksandar, "Effect of silicon carbide nanoparticles size on friction properties of electroless nickel coatings" in Journal of Environmental Protection and Ecology, 21, no. 4 (2020):1314-1325,
https://hdl.handle.net/21.15107/rcub_machinery_3438 .
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