Research on surface modification and wear resistance of aluminum bronze for architectural decoration
In order to improve the surface wear resistance of aluminum bronze alloy for decoration,a combination of unbalanced magnetron sputtering and plasma nitriding was used to prepare modified film layers with different compositions and film thicknesses on the surface of aluminum bronze alloy.The microstructure,phase composition and wear resistance of the modified film layers were compared and analyzed.The results showed that the Ti/Cu atomic ratio of the Cu-Ti film sputtered on the surface of aluminum bronze alloy for decoration was close to 6.7(M1),1.7(M2),and 0.5(M3),with preset film thicknesses of 3.4 µm,3.4 µm,and 2.8 µm,respectively.The cross-sectional thicknesses of M1,M2,and M3 film layers after nitriding treatment at 660℃/2 h were 7.2 µm,5.8 µm,and 2.7 µm,with wear rates of 0.21 m3·N-1·m-1,6.27 m3·N-1·m-1 and 9.98×10-14 m3·N-1·m-1,respectively.After nitriding treatment at 660℃/5 h,there was no significant change in the cross-sectional thickness of M1,M2,and M3 film layers,and the wear rates were 0.47 m3·N-1·m-1,0.22 m3·N-1·m-1 and 3.94×10-14 m3·N-1·m-1,respectively.The wear rate of the film layer after 660℃/2 h and 660℃/5 h nitriding treatment is signifi-cantly reduced compared to the copper alloy matrix.The wear rate of the M1 film layer after 660℃/2 h nitriding treatment is smallest with the best wear resistance,and the wear mechanism is oxidation wear and adhesive wear.
aluminum bronzesurface modification layernitridingmicroscopic morphologyfriction and wear
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