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Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy

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Abstract

Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix.

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Acknowledgements

This work has been performed as a part of activities within the Projects OI 172005, TR 35021 and TR 35045. These projects are supported by the Republic of Serbia, Ministry of Education, Science and Technological Development, whose financial help is gratefully acknowledged. Petr Svoboda acknowledges the Project FSI-S-14-2336 from the Ministry of Education, Youth and Sports of Czech Republic.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, Belgrade 35, 11120, Serbia

    Aleksandar Vencl, Filip Vučetić & Vladimir Popović

  2. Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, 11000, Serbia

    Biljana Bobić

  3. Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69, Brno, Czech Republic

    Petr Svoboda

  4. Institute of Nuclear Sciences “Vinca”, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia

    Ilija Bobić

Authors
  1. Aleksandar Vencl
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  2. Biljana Bobić
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  3. Filip Vučetić
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  4. Petr Svoboda
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  5. Vladimir Popović
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  6. Ilija Bobić
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Correspondence to Aleksandar Vencl.

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Technical Editor: Paulo de Tarso Rocha de Mendonça, Ph.D.

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Vencl, A., Bobić, B., Vučetić, F. et al. Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. J Braz. Soc. Mech. Sci. Eng. 40, 513 (2018). https://doi.org/10.1007/s40430-018-1441-9

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  • DOI: https://doi.org/10.1007/s40430-018-1441-9

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