Abstract: Carbon fiber reinforced carbon (C/C) performs with a density of 1.45g/cm3 was prepared by densification of needled carbon fiber felts with furan resin pressure infiltration in combination with pressure curing and carbonization. The carbon fiber reinforced carbon/silicon carbide dual matrix composites (C/C-SiC) with a density of 2.37g/cm3 were manufactured by liquid silicon infiltration (LSI) into the obtained C/C performs. Microstructure, mechanical and tribological characteristics of the C/C-SiC composites were investigated. SiC matrix was found inside the short-cut fabric, around the needing fibers and among the fiber bundles in the non-woven web. The C/C-SiC composites exhibited excellent mechanical properties and tribological characteristics. The average dynamic friction coefficient and static friction coefficient of the composites were 0.38 and 0.40, respectively. The linear wear rate of the composites and its counterpart were 5.6μm side-1cycle-1 and 3.7μm side-1cycle-1, respectively. The wear mechanisms of C/C-SiC composites were abrasive wear, adhesive wear and and oxidation wear.
Key words: C/C-SiC, reactive melt infiltration, infiltration/carbonization, friction and wear behavior
Author: LI Zhuan, State Key Laboratory of Powder Metallurgy, Centeral South University, Chngsha 410083, China
E-mail: li_zhuan@yahoo.com.cn
Tribology, Vol. 30, Issue 3, 2010, 273~278
