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The observed technological progress related to composites is the result of multifactorial development,
including a dynamic change in the area of modifying the technology of their production and
composition. These procedures prepare the material taking into account environmental standards, time
and other factors that are characteristic during maintenance. Modifying their composition initiated
hybrid composites that are an alternative to known construction materials and improve some of their
properties with simultaneous economic benefits. The authors appreciated the strength characteristics
of hybrid composites reinforced with carbon fibre and powdered alundum. The specimens were made
of certified carbon fabric GG 280 T (twill 2/2, fibre 3K 200 tex, 220 g/m2). For the eight layers of
the fabric configuration [0/45/90/135/0/45/90/135] from 2 mm to 3.3 mm-thick plates were obtained
(depending on the mass of the filler). The matrix used for the study was based on the epoxy matrix
with the trade name L285 with aviation certificates cured by using a hardener H285. The resin and
the hardener were mixed in 100:40. The reinforcement phase was alundum with various grain sizes,
designated as F220, F240, F280, F320 and F360. The mass percentages of these grains shared 5%,
10%, 15%, 20% and 25%. Observation of the effect of using of alundum was possible by comparing
the test results with the samples without the addition of this physical friction modifier. The authors
analyzed the results of tensile strength, three-point bending strength, and interlayer shear strength.
Changes in the modulus of elasticity and deformation were also analyzed. At the same time, tests of
abrasive wear resistance during dry linear friction of a reciprocating nature were carried out. In general,
the obtained results indicate a decrease in mechanical strength and a simultaneous increase in abrasion
resistance with a greater amount of alundum in the composite.