Wear mechanisms of the C/SiC brake materials

The C/SiC brake materials were fabricated by chemical vapor infiltration combined with liquid melt infiltration. The wear mechanisms of C/SiC brake materials were investigated. The main wear mechanisms were grain-abrasion, oxidation-abrasion, fatigue wear, and adhesive wear. These wear mechanisms always occurred simultaneously , and showed mutual enhancing effects between them. Grain-abrasion mainly was the result of hard SiC grain action. Adhesive wear could cause high wear rates and a large unstable friction coefficient. Si was the significant factor on the adhesive wear, so Si in the C/SiC brake materials must be removed. ►The main wear mechanisms of the C/SiC brake materials were grain-abrasion, oxidation-abrasion, fatigue wear, and adhesive wear. ►Adhesive wear could lead to high wear rate and unstable friction coefficient. ►The Si was the significant factor on the adhesive wear. Si in the C/SiC brake materials must be removed.