The friction and wear behavior of the composites of polyetheretherketone(PEEK) reinforced by carbon fiber is decribed in this work. Both the friction coefficient and wear rate of the composites were found to be dependent on the carbon fiber content with a mininum at 10%～20%

and dependent on the load. Although carbon fiber has a reducing effect on the friction and wear of PEEK

its breakage and debonding with the matrix

occuring in the process

may also lead to high friction coefficient and wear rate. The side effect caused by the fiber can be controlled

in a certain degree

by changing the processing of the composites.