ОПТИМИЗАЦИЯ СОСТАВА И РЕЖИМА ТЕРМИЧЕСКОЙ ОБРАБОТКИ ЭЛАСТОМЕРНОГО НАНОКОМПОЗИТА ДЛЯ ВОССТАНОВЛЕНИЯ КОРПУСНЫХ ДЕТАЛЕЙ ТЕХНИКИ

Abstract

The restoration of body parts by applying elastomeric coatings eliminates wear on the holes, increases the life of the part and bearings, and significantly reduces the cost of repairing the car. The filling of the elastomeric matrix with nanoparticles allows a significant increase in the operational properties of the material. The influence of the content of aluminum filler nanoparticles, as well as the mode of thermal treatment by convective method on the deformation-strength properties of the F-40S elastomer-based nanocomposite were investigated. The mechanical properties of the nanocomposite films were evaluated according to the method of GOST 14236-81. These are: strength, elongation and specific breaking work of films. The optimal heat treatment mode of the nanocomposite was determined during the active experiment according to the second order V2 plan. It has been found that the dependence of strength and deformation on the content of the nanoscale filler has the form of a quadratic function with an extremum in the form of a maximum. The maximum strength of 21.64 MPa and the relative deformation of 2.4 have nanocomposite samples at a fill volume of 0.02. With a further increase in the content of filler, the strength and deformation of the nanocomposite samples decrease to 19.2 MPa and 2.03, respectively. The decrease in strength can be explained by aggregation of filler nanoparticles. The optimal composition of the F-40S elastomer-based nanocomposite was determined, providing the highest mechanical properties of the material: elastomer F-40S - 100 parts by weight, aluminum nanopowder - 0.075 parts by weight. Based on the results of the multifactorial experiment, a regression model of the dependence of the specific destruction work of the nanocomposite films on the temperature and time of thermal treatment by a convective method was obtained. The optimal mode of convective heating of the elastomeric nanocomposite was determined: temperature 40.0 0S, time 3.0 hours, at which the material films have the highest specific fracture operation of 52.0 MJ/m3.