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Dry Sliding Wear Behaviour of Plasma Sprayed Flyash-Al2O3 and Flyash-SiC Coatings on the Al6061 Aluminum Alloy

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Abstract

In the present work, flyash-Al2O3 and flyash-SiC composite feedstock powders were plasma coated with equal weight ratios on the surface of Al6061 alloy substrate. NiCr material was used as a bond coat to enhance bond strength between coatings and substrate. The dry wear performance of the coated and uncoated substrates were examined by means of a pin-on-disk test rig and effects of varying operating parameters like applied load, sliding distance and sliding velocity on the wear behaviors of the developed coatings were examined. Wear mechanisms were identified using scarred surfaces via scanning electron microscopy (SEM), indicate sever plastic flow for bare substrate and brittle fracture in the case of coated substrates. The results revealed that, the flyash-Al2O3 coated specimens possessing superior wear resistance when compared to flyash-SiC coated and bare substrate.

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Authors and Affiliations

  1. Department of Automobile Engineering, Dayananda Sagar College of Engineering, Bangalore, 560078, Karnataka, India

    B. E. Naveena & N. Sekhar

  2. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, 560078, Karnataka, India

    R. Keshavamurthy

Authors
  1. B. E. Naveena
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  2. R. Keshavamurthy
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  3. N. Sekhar
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Correspondence to R. Keshavamurthy.

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Naveena, B.E., Keshavamurthy, R. & Sekhar, N. Dry Sliding Wear Behaviour of Plasma Sprayed Flyash-Al2O3 and Flyash-SiC Coatings on the Al6061 Aluminum Alloy. Silicon 11, 1575–1584 (2019). https://doi.org/10.1007/s12633-018-9978-x

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  • DOI: https://doi.org/10.1007/s12633-018-9978-x

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