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The paper examines the tribotechnical characteristics of materials with a fluoroplastic matrix containing an inorganic filler. It is established that the tribotechnical properties of the test materials depend on the particle size of the filler, its content in the matrix, and friction pressure. With smaller particles, the friction coefficient and wear rate of the composite decrease. Comparing the dependence of the friction coefficient and wear rate on the amount of the filler, its particle size, and friction coefficient shows that composite containing 25% inorganic filler with particles smaller than 10 µm is optimal for actual use. Keywords: powder material, fluoroplastic matrix, inorganic filler, friction coefficient, wear rate.Tribotechnical materials with good wear, thermal, and corrosion resistance and low friction coefficient are very promising. Appropriate ingredients are selected to develop new materials with such properties.As a polymer matrix, we used fluoroplastic, which combines unique properties: extremely high corrosion resistance and thermal stability and low friction coefficientDifferent fillers are used to ensure the required tribotechnical characteristics of polymeric composite materials [2−5]. In our study, we have chosen glass-ceramics [6], which contains silicon, calcium, magnesium, and sodium compounds. Glass-ceramics is advantageous in that it is chemically resistant to most industrial media at high temperatures [7].To make samples, fluoroplastic and filler powders were placed into a mixer to uniformly distribute the particles over the matrix of the composite material at liquid-nitrogen temperature. The powder mixture was compacted under a pressure of 100 MPa at room temperature. The compacts were treated at 370 ± 10°C for 1 h. Filler powders of three particle sizes were used, the average particle size being 5, 20, and 50 µm. We introduced 10, 25, and 50 vol.% filler powder into the composite.The tribotechnical properties of the composite material were determined using an M-22 friction machine at a sliding speed of 1 m/sec and a pressure of 0.5-5 MPa on the sample. The counterface was made of steel . The tribotechnical characteristics of fluoroplastic composites with an inorganic filler are shown in Figs. 1 to 4. Figures 1 and 2 show the friction coefficient and wear rate of the samples as a function of the filler particle size and pressure applied. The results testify that the friction coefficient and wear of the sample decrease with smaller particles of the filler.

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