LI Zhuan*, XIAO Peng, XIONG Xiang

(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)

Abstract: Carbon fibre reinforced carbon and SiC dual-matrice (C/C-SiC) brake composites are fabricated by the combination of chemical vapor infiltration with liquid silicon infiltration. The tribological behavior and mechanism of C/C-SiC composites are investigated. The results show that when the brake speed increases from 5 000 to 7 500 r/min, the brake system of C/C-SiC and 30CrMoSiVA alloy steel shows good stability, the coefficient of friction is reduced from 0.33 to 0.29, and the line wear rate increases from 2.01 μm per brake to 3.40 μm per brake. The friction between the C/C-SiC and 30CrMoSiVA alloy steel plate is controlled by the combined action of plowing and adhesive effect. The main wear mechanism of C/C-SiC composites are abrasive wear, adhesive wear, oxidation and fatigue wear.

Key words: C/C-SiC; chemical vapor infiltration; liquid silicon infiltration; brake composites

E-mail: li_zhuan@yahoo.com.cn 

Tribology, Vol. 32, Issue 4, 2012, 332~337