JOM

, Volume 58, Issue 11, pp 87–91 | Cite as

Co-continuous composite materials for friction and braking applications

  • Glenn S. Daehn
  • Michael C. Breslin
Overview Low-Cost Composites in Vehicle Manufacture

Abstract

Reactive infiltration of precursor ceramics (e.g., the formation of an alumina-aluminum composite by reaction of silica in liquid aluminum) is a low-cost and versatile method of creating materials with interpenetrating co-continuous ceramic and metal phases. By controlling the composition and microstructure of the precursor and the composition of the reaction bath, one can control the structure and properties of the resulting material. This paper summarizes preliminary attempts to use these routes to create next-generation materials for automotive brake rotors. Two types of materials were tested. The first is a two-level composite of a co-continuous alumina-aluminum structure that surrounds SiC particles that provide thermal conductivity. For higher-temperature use, the aluminum alloy is replaced with aluminum-bronze. Both materials show friction and wear properties similar to cast iron, but with half the density and better thermal conductivity.

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Copyright information

© TMS 2006

Authors and Affiliations

  • Glenn S. Daehn
    • 1
    • 2
  • Michael C. Breslin
    • 1
  1. 1.Excera Materials Group in Worthington
  2. 2.Department of Materials Science and Engineering at Ohio State University in Columbus

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