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Tribological properties of nematic and smectic liquid crystalline mixtures used as lubricants

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Abstract

The paper presents the description and analysis of the results obtained in the investigation performed on disc—ball tribotester T-11. Samples of 100Cr6 (European) steel were tested, while as a lubricant, liquid crystalline mixtures in nematic as well as smectic A, B and E phases were used. The friction force and the wear of sample and counter-sample were measured. The analysis of values of friction coefficients has shown that the friction coefficient of liquid crystalline mixtures is lower than that of paraffin oil. Nematic mixtures have a low friction coefficient under a load of 50 N and smectic B mixtures have low friction coefficient under 20 N, 30 N and 40 N load.

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Acknowledgments

The authors wish to thank Professor Roman Dąbrowski from Military University of Technology for providing the compounds and Professor Włodzimierz Sułek from Technical University of Radom for offering facilities for measuring.

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Authors and Affiliations

  1. Faculty of Materials Science and Footwear Technology, Radom Technical University, Chrobrego 27, 26-600, Radom, Poland

    B. Ważyńska

  2. Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland

    J.A. Okowiak

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  1. B. Ważyńska
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  2. J.A. Okowiak
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Correspondence to B. Ważyńska.

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Ważyńska, B., Okowiak, J. Tribological properties of nematic and smectic liquid crystalline mixtures used as lubricants. Tribol Lett 24, 1–5 (2006). https://doi.org/10.1007/s11249-006-9049-0

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  • DOI: https://doi.org/10.1007/s11249-006-9049-0

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