Izvestiya of Saratov University.
ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)


On the mechanism of increasing the mechanical characteristics of cured polymer composite materials under the action of a microwave electromagnetic field

Background and Objectives: The aim of the research is to identify the general mechanism of the processes occurring in the microstructure of polymer composite materials when exposed to an ultrahigh-frequency electromagnetic field in the cured state, contributing to an increase in strength characteristics, based on the analysis of the structural features of the matrix and the interfacial layer of cured carbon fiber and the physical foundations of dielectric heating.


На основе комплексных экспериментальных исследований микроструктуры отвержденных полимерных композиционных материалов на эпоксидной матрице, установлено, что в матрице и межфазном слое при взаимодействии со сверхвысокочастотным электромагнитным полем, энергетические параметры которого не достигают значений, вызывающих деструкцию матричного материала, происходят изменения, способствующие увеличению количества областей контактного взаимодействия «матрица – волокно», в результате которого повышается связанность армирующих компонентов и равномерность перераспределения вн

Magnetic Properties of Textured NiFe(111) and NiFe(200) Films

Thickness dependencies (d м 20–370 nm) of the saturation magnetization 4πМ, the ferromagnetic resonance linewidth ΔH, the coercivity field Hc and the shape of hysteresis loops were investigated for Ni80Fe20 (NiFe) films with (200) texture. The thickness dependencies of magnetic parameters for NiFe(200) films were compared with the dependencies 4πМ(d), ΔH(d) and Hc(d) for NiFe(111) films with strong (111) texture and polycrystalline NiFe films.

Influence of Argon Pressure on Texture and Microstructure of Cobalt Films Produced by Dc-Sputtering

Background and Objectives: The development of methods of textured Co film formation is of practical interest in the field of creating media with perpendicular recording of information or lateral spin-valve structures. Despite a rather wide study of the growth conditions effects on the microcrystalline structure of sputtered cobalt films, the possibility of changing the texture and microstructure via a change of the gas pressure has not been discussed.