Friction and wear property of CNT-SiC hybrid reinforced aluminum matrix composites prepared by powder metallurgy

Abstract

Silicon carbide (SiC) particles,carbon nanotubes (CNT), SiC and CNT hybrid reinforced 7055Al composites were prepared by powder metallurgy with 7055Al as matrix. The dry sliding friction and wear behavior of the three composites were studied. The results show that the wear mass loss increases and the friction coefficient decreases slightly with the increase of the load.The wear mass loss of the SiC-CNT/7055Al composite is lower than that of the single SiC/7055Al and CNT/7055Al reinforced composites at 0.5 MPa and 1.0 MPa.The wear mass loss of the SiC-CNT/7055Al composite increases rapidly at 2.0 MPa. With the increase of the load,the wear resistance of CNT/7055Al composite increases gradually;under medium and high load,the composite owns better wear resistance.The wear amount of SiC/7055Al composite increases gradually with the increase of the load, and the wear mass loss increases little at load of 2.0 MPa.

Keywords

• powder metallurgy
• hybrid reinforced aluminum matrix composite
• dry sliding friction and wear
• wear mechanism