Resin Matrix Brake Materials Reinforced by Nano-Al₂O₃ for Mining Equipment

Abstract

To verify the effect of Al₂O₃ particle content and size as an abrasive on resin matrix friction materials for mining equipment, the tribological performance of friction materials was studied by using a blockon- ring tribotester over a wide range of applied load and sliding speed. The testing conditions simulated brake conditions of mining equipment. The antiwear property of nano-Al₂O₃ was superior to that of micro- Al₂O₃ for friction materials. The friction coefficients of specimens increased with the increase of nano-Al₂O₃ content. The wear rates decreased with increasing nano-Al₂O₃ content. The wear rates of specimens containing nano-Al₂O₃ was about 2–8 times lower than that of specimen with micro-Al₂O₃. The specimen with 10.5 vol% nano-Al₂O₃ showed the best tribological properties. The wear mechanism of specimens with nano-Al₂O₃ was abrasive wear and plastic deformation.

Keywords

composite / brakes / friction / wear

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