Through the powder metallurgy method

the short carbon fiber reinforced copper matrix composites with different content of short carbon fiber were prepared including 2.5%、5.0%、7.5%、10.0%、12.5% and 15.0% in volumetric fraction

respectively.By means of MZL-500H friction wear testing machine

the effects of the short carbon fiber volume fraction and current density on tribological properties of the composites prepared were investigated.The results show that under the conditions of the fixed current density 0.315 A/mm2 and the fixed sliding speed 25 m/s as well as loading of 30 N

with the increase of carbon fiber content

the frictional coefficient of the composites is decreased firstly and then increased.Meanwhile

the composites prepared with copper coated short carbon fiber exhibit the more excellent friction coefficient than those without the copper coated short carbon fiber.The volume wear rate of the composites prepared with copper coated short carbon fiber is decreased firstly and then increased while the volume wear rate of the composites prepared without copper coated short carbon fiber is increased.With loading of 30 N and sliding speed of 25 m/s

the friction coefficient of the composites is decreased while the volume wear rate is increased with the increase of the current density.In addition

wear mechanism is transformed gradually toward the arc erosion.The composites with the 12.5% copper coated short carbon fiber exhibit the lower friction coefficient and volume wear rate than those with the 5% copper coated short carbon fiber.