729756.fig.002
Figure 2: Wear intensity (I) of specimens: pure UHMWPE (1), nanocomposites UHMWPE +0.1 (2), 0.5 (3), 1 (4), 2 (5) wt.% HA and microcomposites UHMWPE +5 (6), 10 (7), 20 (8), 40 (9) wt.% HA at the steady-state wearing stage.