ABSTRACT
Metal matrix composites (MMCs) combine diverse properties from the metal matrix and ceramic reinforcements. MMCs can be made lighter by judicious choice of metal matrix and light-density ceramic fiber or whisker or particles. Significant improvements such as heat resistance, creep properties, wear resistance, friction stability, specific strength, and stiffness are the highlights of MMCs. In this chapter, the focus is on giving a general overview of MMCs and specific discussion of the tribological properties of MMCs. Classification of MMCs and applications are discussed. The wear and friction behavior of MMCs in dry and wet conditions is discussed based on the latest research literature. The relationship between the surface hardness of MMC layer and specific wear is presented along with discussions. Characterization techniques used for conducting tribological research on MMCs are surveyed. Schematic diagrams of adhesive, abrasive, plastic deformation, oxidative wear, and delamination wear mechanisms are included with discussions. Reinforcements preferred for use in MMCs are shown. Finally, theoretical approaches and simulation techniques for predicting tribological properties of MMCs are critically reviewed.
