Tribological Properties of Al 65Cu 20 Cr 15 QuasicrystallineParticles/Al Matrix Composite Alloys

In this paper the tribological properties and hardness of Al 65Cu 20Cr 15 quasicrystalline particles/Al composite alloys are reported. It was found that the hardness of the alloys increases with increasing volume fraction of quasicrystalline particles and the maximum hardness is as high as 1 200 MPa, being 4 times of that of Al. At our test conditions, frictional coefficient and wear rate are lower than that of Al and decrease with increasing volume fraction of quasicrystalline particles in a range from 15% to 20%, when volume fraction reaches 25%, the frictional coefficient and wear rate increase to some extent.