OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 1 2025 carbon, chlorine, iron, and calcium. The presence of iron and calcium is likely related to the wear of the steel disks and the transfer of wear debris to the sample surfaces. Figs. 6, a–d show the presence of bentonite, carbon, and chlorine, which confirms the inclusion of polyphenylene sulfide (PPS) and glass fiber in the composite. The EDS analysis also shows an increase in the concentration of aluminum, iron, and calcium. Influence of sliding speed on wear at different loads Further research is planned to compare the tribological characteristics of samples with different clay contents at constant load and sliding speed values. Fig. 7, a-c shows the dependence of wear on sliding speed for each sample. Increasing the sliding speed leads to an increase in wear. This effect may be due to the dominance of the adhesive wear mechanism over the abrasive one. The present study investigated the influence of bentonite clay on the wear of PPS + GF composites. Influence of load on wear at constant and minimum sliding speed Analyzing the influence of load onwear at aminimum sliding speed is important for planning experiments using the Taguchi method. Fig. 8 shows that increasing the load leads to a sharp increase in wear for the PGB0 sample (without clay). Samples containing bentonite clay exhibit a smaller increase in wear with increasing load compared to PGB0. Increasing the load leads to an increase in temperature in the contact zone, which softens the polymer matrix and promotes delamination of the polymer film, exposing the glass a b c Fig . 7. Wear vs Sliding velocity
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