2001•Journal of Central South University of Technology(Natural Science)Requires access
Frictional and wear behaviors of C/C composites from a needled felt at different braking speeds
Huang Bai
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Abstract
Frictional and wear behaviors of C/C composites from a needled felt were investigated at different braking speeds by simulating the aircraft braking with pairs of small circle samples. The frictional surfaces were examined with optical metallograph. The braking speeds increased from 0 in step of 5 m/s. At the speed 5 m/s or at static the friction coefficient is very low, but then it reaches to the maximum at the speed 10 m/s rapidly. At this moment the braking energy is low. When the speed is over 20 m/s the friction coefficient goes constant but keeps high enough, demonstrating its excellent high energy and high temperature braking property. On the other hand, except at the speed 28 m/s, its wear property is also excellent. At the speed 15 m/s there appears a small wear peak. Wear debris and braking speeds have influence on the microstructures of friction surfaces. Wear debris and the base carbon on the surface are preferentially oxidized during braking.