OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 1 2025 Ta b l e 5 Experimental Observation Table for Pin-on-Disk Wear Test Material Type Normal Load (N) Sliding Speed (m/s) Sliding Distance (m) Wear Rate (mm3/N∙m) Coefficient of Friction SEM observations Base Acrylate 10 1 1,000 1.2 × 10−6 0.45 Smooth surface with slight wear tracks; minor material removal observed 5 % wt. PEEK in Acrylate composites 10 1 1,000 0.9 × 10−6 0.4 Increased uniformity: moderate wear marks but reduced material loss compared to base Acrylate 10 % wt. PEEK in Acrylate composites 10 1 1,000 0.7 × 10−6 0.35 Enhanced surface homogeneity; minimal wear tracks, indicating higher wear resistance The 10 wt. % PEEK in Acrylate composite demonstrated the best wear resistance among the tested materials, with a wear rate of 0.7×10−6 mm3/N⋅m and a friction coefficient of 0.35. SEM images of the 10 wt. % PEEK in Acrylate composite surface revealed high uniformity and minimal wear tracks, indicating a significant improvement in wear resistance at this reinforcing component concentration. This improvement is likely due to the uniform distribution of reinforcing particles, which effectively prevents material degradation under friction and load. Increasing the degree of reinforcement from base Acrylate to the 10 wt. % PEEK composite leads to an improvement in both wear resistance and frictional properties. This indicates that increasing the degree of reinforcement enhances the structural integrity of the composite, reducing erosion and friction under highload conditions. Fig. 12 shows a liner fabricated via DLP 3D-printing from the 10 wt. % PEEK in Acrylate composite biomaterial. This allows for the conclusion that the 10 wt. % PEEK in Acrylate biomaterial is suitable for 3D-printing at room temperature in order to obtain the desired geometry for orthopedic implants. Fig. 12. DLP 3D-printed hip joint implant liner made from Acrylate composite with 10 wt % PEEK
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