Microstructure Control and Wear of Al2O3-SiC-(Al, Si) Composites Made by Melt Oxidation

Authors

  • Vikram Jayaram,

    1. Department of Metallurgy and Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560 012, India
    Search for more papers by this author
    • Department of Metallurgy.

  • Rampada Manna,

    1. Department of Metallurgy and Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560 012, India
    Search for more papers by this author
    • Department of Metallurgy.

  • Manjunath G. Kshetrapal,

    1. Department of Metallurgy and Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560 012, India
    Search for more papers by this author
    • Department of Mechanical Engineering.

  • Jaydeep Sarkar,

    1. Department of Metallurgy and Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560 012, India
    Search for more papers by this author
    • Department of Metallurgy.

  • Sanjay K. Biswas

    1. Department of Metallurgy and Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560 012, India
    Search for more papers by this author
    • Department of Mechanical Engineering.


  • N. E. Claussen—contributing editor

  • Supported by the planning commission, Government of India.

Abstract

Ceramic matrix composites of Al2O3-SiC-(Al, Si) have been fabricated by directed melt oxidation of aluminum alloys into SiC particulate preforms. The proportions of AI2O3, alloy, and porosity in the composite can be controlled by proper selection of SiC particle size and the processing temperature. The wear resistance of composites was evaluated in pin-on-disk experiments against a hard steel substrate. Minimum wear rate comparable to conventional ceramics such as ZTA is recorded for the composition containing the highest fraction of alloy, owing to the development of a thin and adherent tribofilm with a low coefficient of friction.

Ancillary