The influence of the dispersed filler based on the Ti–Fe–Si–C system on the physicomechanical properties and structure of epoxy composites

Keywords

composite, polymer, powder, filler, structure, strength, adhesion, epoxy resin.

Cite as

Baranovska О. V., Bagliuk G. А., Buketov A. V., Sapronov O. О., and Baranovskyi D. І. The influence of the dispersed filler based on the Ti–Fe–Si–C system on the physicomechanical properties and structure of epoxy composites. Physicochemical Mechanics of Materials. 2023. 59(5), 89-96.

https://doi.org/10.15407/pcmm2023.05.089

Abstract

The influence of a dispersed powder filler obtained by thermal synthesis from a mixture of 65% titanium hydride, 30% ferrosilicon, and 5% technical carbon powders, on the main physicomechanical properties of a polymer composite based on ED-20 epoxy diane oligomer, is investigated. The content of the filler varied in the range from 5 to 40 mass%. The introduction of the filler into the polymer composition leads to a noticeable increase in the main mechanical characteristics of the composite. Its maximum values at the dispersed component content of 10%, ensure an increase in bending strength in 1.6 times, and an impact toughness in 1.7 times compared to the original matrix. A further increase in the dispersed filler content in the composite composition to 20–40% leads to a decrease in fracture stresses, the level of which, however, still exceeds the strength of the original matrix phase. Composites with 5% filler demonstrate maximum values of adhesive strength and minimum values of residual stresses.  When the content of dispersed filler increases by more than 5–10%, the formation of the dispersed particles conglomerates the number and size of which increase with the increase in the powder concentration in the mixture is observed in the composite structure.

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