This paper investigated the wear performances of Y2O3 doped MA6000 (Ni-Cr-Al)
alloy produced by mechanical alloying (MA). Produced, all powders were
pre-formed by cold pressing and sintered in a vacuum environment. Sintered
MA6000-X% Y2O3 superalloys were characterized by scanning electron
microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction
(XRD) analysis, density, and hardness measurements. Wear tests of Y2O3 added
MA6000 alloys were carried out in a block-on-ring type wear device. In the
wear tests, the sliding speed of 1 ms-1 at room temperature (RT) was
performed under five different sliding distances (200-1000m) and three
different loads (5 N, 10 N, and 15 N). As a result of the studies, it was
determined that the MA?ed MA6000 superalloy powders were homogeneous and
flake shape. With the increase amount of Y2O3, hardness of these superalloys
increased from 267 to 431 Hv, but the density slightly decreased. Different
intermetallic/carbur phases such as Ni3Al, MoC are observed in all
compositions. Wear tests show that weight loss and wear rate decreased, and
friction coefficient (?) increased with the increasing amount of Y2O3
additive. Besides, it was determined that as the applied load increased in
the wear test, the weight loss increased, but the wear rate and friction
coefficient (?) decreased.