Tribological characteristics of A356 Al alloy-SiCP composite discs

R. C. Shivamurthy, M. K. Surappa

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The dry sliding wear and friction behaviour of A356 Al alloy and its composites containing 10 and 20vol.% SiCP have been studied using pin-on-disc set up. In these tests, A356 Al alloy and its composites are used as disc whereas brake pad was used in the form of pins. Wear tests were carried out at a load of 192N and the sliding speed was varied from 1 to 5m/s. Tests were done for a sliding distance of 15km. The effects of sliding velocity on the wear rate, coefficient of friction and nature of tribolayers formed on discs have been studied. Wear rates of composites as calculated by weight loss method, found to be negative at sliding speed of more than 2m/s. Worn surfaces of pins and discs have been analyzed using scanning electron microscope. SEM and EDAX analysis of worn surfaces of composite discs showed formation of tribolayers, consisting of mixture of oxides of Al, Si, Cu, Ca, Ba, Mg, and Fe. In these layers, copper and barium content found to be increase with sliding speed in the case of composites.

Original languageEnglish
Pages (from-to)1946-1950
Number of pages5
Issue number9-10
Publication statusPublished - 29-07-2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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