OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 1 2025 performance under operating conditions. It is noted that surface treatment of montmorillonite (MMT) clay leads to improved adhesion and interaction with reinforcing components, which positively affects the strength characteristics of the composites (tensile and flexural strength) and complements the functionality provided by natural fibers. Surface modification imparts hydrophobic properties to hydrophilic MMT, enhancing its compatibility with the organic polymer matrix. It should be noted that the interfacial interaction between the matrix and the reinforcing clay fibers has a significant influence on the process of local strain formation (as confirmed by the Digital Image Correlation method), as well as on the processes of initiation and propagation of damage in carbon fiber reinforced polyphenylene sulfide (PPS) samples (5HS) during tensile testing at angles of ± 45° and 0°. Interfacial adhesion has a substantial impact on the failure mode: samples with strong interfacial bonding exhibit cohesive failure, while samples with weak interfacial bonding are characterized by intensive delamination [7–9]. In addition to the interface, the frequency of motion affects tribological characteristics: the coefficient of friction decreases with increasing frequency. Conversely, increasing the sliding distance leads to an increase in the coefficient of friction. Typical load does not significantly affect wear. The dependence of wear on the distance traveled is complex: it initially decreases and then increases. Thus, the coefficient of friction and wear rate depend on the load and frequency of reciprocating motion. The network structure of dispersed silicate layers in nanocomposites, and therefore the viscosity properties of nanocomposites, are largely determined by the concentration of added OMMT fibers [10–12]. This paper presents a novel smallangle X-ray scattering (SAXS) method for analyzing the degree of dispersion of silicate layers in a polymer matrix. SAXS and STEM results showed that an OMMT content of 5 wt. % is a threshold, initiating the formation of a strong flocculated structure of dispersed silicate layers. Further increasing the concentration of OMMT significantly alters the viscosity properties of the nanocomposite containing 5 wt. % OMMT [13]. A composite coating of carbon fiber-reinforced PPS applied to stainless steel and operating under water lubrication condition exhibits significantly higher wear resistance than under dry friction conditions [14– 15]. The tribological behavior of the composite coating under water lubrication depends on both sliding speed and load. At low speed (0.43 m/s), a steady increase in friction is observed, which transitions to a gradual decrease with increasing load. The effect of sliding speed on the wear rate of the composite coating is less pronounced than the effect of load on the coefficient of friction, which rapidly increases under pressure. The coefficient of friction gradually increases with increasing load; at high speeds (0.86 m/s), this effect is amplified [16–18]. A study of the effect of dry and water lubrication on the tribological characteristics of carbon fiberreinforced polyphenylene sulfide coatings shows that the fluctuations of the coefficient of friction over time are more stable when using water lubrication than with dry friction. The composite coating operating under water lubrication exhibits higher wear resistance than under dry friction conditions. Studies [19–20] present data devoted to the study of the tribological and mechanical properties of a composite material consisting of 70 % polyamide-66 (PA66) and 30 % polyphenylene sulfide (PPS) modified with various contents of polytetrafluoroethylene (PTFE). The authors express their sincere gratitude to the Mechanical Engineering Department of Dr. Babasaheb Ambedkar Technological University, Lonere; D. N. Polymers, Chinchwad; Vishwakarma Institute of Information Technology, Kondhwa, Pune; DUTECH India Laboratories, Pune; and Agharkar Research Institute, Pune, for their support and invaluable contributions to this work. The authors are also grateful to the listed organizations for their contributions to the research. Experimental procedure Analysis has shown that adding PTFE to the PA66/PPS blend negatively affects the properties of the latter but significantly reduces the coefficient of friction and increases wear resistance. A PPS-based composite with 40 % glass fiber and varying concentrations of bentonite clay additives, obtained by thermalcompression bonding, is to some extent environmentally friendly. This study investigated the influence of
RkJQdWJsaXNoZXIy MTk0ODM1