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Tribological Behaviour of Multi-Walled Carbon Nanotubes (MWCNT) Filled Polybutylene Terephthalate (PBT) Nanocomposites

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Abstract

This paper focuses on evaluating the tribological properties of PBT/MWCNT nanocomposites at low CNT concentrations of 0.1, 0.2, 0.3, 0.4 and 0.5 wt%. The composites were prepared by melt-compounding and samples were tested in a pin-on-disc sliding configuration under different load conditions. It was found that the friction coefficient of the composites reduced with increasing CNT content, irrespective of the test load. Meanwhile, the specific wear rate of the composites first decreased and later increased with increasing CNT content. SEM of the worn out surfaces indicated that ploughing and peeling phenomenon of PBT was suppressed at lower CNT addition, but with increasing CNT content the surface seemed to be more damaged. The transfer film formed on the counter-face was also investigated by SEM. It was revealed that the PBT/MWCNT composites formed a thin and more uniform film as compared to the thick and grainy films deposited by virgin polymers. But at higher CNT concentrations, the transfer film once again became lumpy. These findings could be attributed to the presence of CNT agglomerates within PBT matrix at higher CNT concentrations due to non-uniform dispersion.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology, Nagpur, 440010, India

    Swamini Chopra, Saisha Batthula, Kavita Deshmukh & Dilip Peshwe

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  1. Swamini Chopra
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  2. Saisha Batthula
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  3. Kavita Deshmukh
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  4. Dilip Peshwe
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Correspondence to Swamini Chopra.

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Chopra, S., Batthula, S., Deshmukh, K. et al. Tribological Behaviour of Multi-Walled Carbon Nanotubes (MWCNT) Filled Polybutylene Terephthalate (PBT) Nanocomposites. Trans Indian Inst Met 70, 801–807 (2017). https://doi.org/10.1007/s12666-017-1055-4

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  • DOI: https://doi.org/10.1007/s12666-017-1055-4

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