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Microstructure and properties of graphite-reinforced copper matrix composites

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Abstract

In this study, copper matrix composites reinforced with graphite (5, 10, 15 wt%) were produced using powder metallurgy process. Milled powders were compacted under 637 MPa pressure to produce cylindrical specimens of approximate dimension of 10 mm diameter and 30 mm length. Cylindrical specimens were sintered under vacuum at 900, 950, 1000 °C for 2 h holding time at highest temperature. Hardness and compression strength of composite samples were determined. The microstructures of specimens were investigated by optical microscope, scanning electron microscope and energy-dispersive spectroscopy. Homogeneous distribution of reinforcement phase in copper matrix composites was observed. Graphite reinforcement improved the compression strength of composites of around 108% with 5 wt%, around 34% with 10 wt% of reinforcement. However, significant decrease of compression strength was observed with 15 wt% of graphite reinforcement in the copper matrix. Reinforcement of graphite into copper matrix has improved the wear property of the composite materials.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Institute of Technical Teachers’ Training and Research (NITTTR), Kolkata, FC Block, Sector III, Salt Lake City, Kolkata, West Bengal, 700106, India

    Jhulan Kumar & Subrata Mondal

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  1. Jhulan Kumar
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  2. Subrata Mondal
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Correspondence to Subrata Mondal.

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The authors declare that they have no conflict of interest.

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Technical Editor: Márcio Bacci da Silva.

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Kumar, J., Mondal, S. Microstructure and properties of graphite-reinforced copper matrix composites. J Braz. Soc. Mech. Sci. Eng. 40, 196 (2018). https://doi.org/10.1007/s40430-018-1115-7

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  • DOI: https://doi.org/10.1007/s40430-018-1115-7

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