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Correlation of Microstructures and Tribological Properties of Ferrous Coatings Deposited by Atmospheric Plasma Spraying on Al-Si Cast Alloy Substrate

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Abstract

The microstructure and tribological properties of ferrous coatings applicable to cylinder bores were investigated in this study. Two kinds of ferrous powders were sprayed on Al-Si cast alloy (EN AlSi10Mg) substrate by atmospheric plasma spraying. Microstructural analysis showed that various Fe oxides were formed in the coatings. The presence of pores, unmelted particles, and Fe precipitates was also noticed. The pin-on-ring tribometer was used to carry out tribological tests under lubricated sliding conditions: sliding speed of 0.5 m/s, sliding distance of 5000 m, and normal load of 450 N. High porosity and the presence of larger and irregularly shaped pores as well as the amount of oxides were the controlling factors for the crack initiations and, consequently, the wear rate. Tribological properties of the coatings were compared with gray cast iron as a standard material for cylinder blocks and showed that, for the investigated conditions, both coatings could be an adequate substitution.

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Acknowledgments

This work was performed under the EUREKA program project E! 3240. The assistance of the partners of the project (Petar Drapšin, Serbia, for providing and preparing the test specimens), as well as the financial support received from the Republic of Serbia, Ministry of Science and Environmental Protection, is gratefully acknowledged.

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Authors and Affiliations

  1. Tribology Laboratory, Mechanical Engineering Faculty, University of Belgrade, 11120, Belgrade 35, Serbia

    Aleksandar Vencl (Assistant Professor)

  2. Material Science Laboratory, Aeronautical Plant “Moma Stanojlović,”, 11000, Belgrade, Serbia

    Mihailo Mrdak (Research Guide)

  3. Laboratory for Thermodynamics, Mechanical Engineering Faculty, University of Belgrade, 11120, Belgrade 35, Serbia

    Miloš Banjac (Assistant Professor)

Authors
  1. Aleksandar Vencl
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  2. Mihailo Mrdak
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  3. Miloš Banjac
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Correspondence to Aleksandar Vencl.

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Manuscript submitted January 30, 2008.

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Vencl, A., Mrdak, M. & Banjac, M. Correlation of Microstructures and Tribological Properties of Ferrous Coatings Deposited by Atmospheric Plasma Spraying on Al-Si Cast Alloy Substrate. Metall Mater Trans A 40, 398–405 (2009). https://doi.org/10.1007/s11661-008-9693-0

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  • DOI: https://doi.org/10.1007/s11661-008-9693-0

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