Friction and Wear Properties of AlN_P/Al and TiB_(2P)/Al Composites

The friction and wear properties of two composites and matrix alloy under oil-lubricated conditions were investigated, and related wear mechanisms were analyzed. Results show that, under lubricated conditions, friction coefficient of AlN_P/Al composite changes from low to high and gradually becomes steady, but just the reverse is that of TiB_(2P)/Al composite due to the formation of lubricating oil film. As particles strength increases, 50% (volume fraction) TiB_(2P)/Al composite has lower friction coefficient and higher wear resistance than that of 50% AlN_P/Al composite. In addition, because of introduction of particle reinforcements, adhesion resistance of composites is obviously improved and better than that of matrix alloy.