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Moscow oblast, Russia

Khasanshin R.K.,OAO Kompozit | Novikov L.S.,Moscow State University
Inorganic Materials: Applied Research

The effect of electron irradiation of K-208 glass on the process of deposition of the products of thermostimulated gas emission from a high molecular weight composite is studied. The samples are irradiated in a vacuum chamber at a pressure of 10−4 Pa with electrons with an energy of 30 keV at flux densities ranging from 1010 to 2 × 1011 cm−2 s−1. The sample surfaces are investigated by the methods of atomic force microscopy (AFM). It is shown that the formation of impurity films is significantly affected by the surface structural changes caused by electrostatic discharges, the nature of which depends on the electron flux density. © 2015, Pleiades Publishing, Ltd. Source

Khasanshin R.K.,OAO Kompozit | Vintaykin I.B.,Moscow State Technical University
Inorganic Materials: Applied Research

A computational and experimental investigation of the influence of the filler particle distribution on the polymer composite material weight loss in vacuum upon irradiation with electrons is performed. The model of the radiolysis product migration in materials under investigation is proposed for numerical analysis of the experimental data. It is shown that the weight loss rates of model materials upon irradiation at fluences not exceeding the threshold values depend on the type of filler distribution. © 2014, Pleiades Publishing, Ltd. Source

A procedure for calculating the penetration depth of reactions of the chemical vapor infiltration of refractory materials from the vapor phase into a porous body is proposed to select the parameters of the production process of obtaining composites with a pyrolytic matrix. The interrelation between the penetration depth of the reaction with the porous body and vapor-phase characteristics is presented. It is shown that the calculated data make it possible to reveal the regularities of developed processes and substantially shorten the number of experiments for determining the production parameters. © 2014 Allerton Press, Inc. Source

Khasanshin R.H.,OAO Kompozit | Novikov L.S.,Moscow State University
Advances in Space Research

When irradiating K-208 and CMG glasses by 20-keV electrons with flux densities of 1010 < ϕe <2×1011 cm-2 s-1 in vacuum 10-4 Pa, electrostatic discharges accompanied by plasma emission and destruction of glass surfaces were observed. Examination of glasses by atomic force microscopy (AFM) showed significant difference in structural changes of surfaces of K-208 and CMG samples irradiated by equal flux densities within the range from 2.0×1010 to 9.0×1010 cm-2 s-1 that can be explained by different mechanisms of removal of charge accumulated in glasses. Surface discharges generating channels on surfaces of K-208 and CMG glasses appear when ϕ ≥7.4×1010 cm-2 s-1 and ϕ ≥8.7×1010 cm-2 s-1 respectively. In average, if radiation conditions are the same and ϕ ≥1.4×1011 cm-2 s-1, the channels are 1.5 times deeper in K-208 than in CMG. © 2016 COSPAR. Source

Gladkikh S.N.,OAO Kompozit
Polymer Science - Series D

The article discusses the technological and strength properties of newly developed elastic coldcuring polyurethane adhesives PU-ELBO. Examples are given of applying adhesives in the units and assemblies of electric and radio components that operate under increased humidity, cyclic variations of temperature, and vibration loads. It is noted that, in a cured state, the developed PU-ELBO adhesive is characterized by minimal levels of gas emissions in vacuum and at high temperatures. © 2011 Pleiades Publishing, Ltd. Source

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