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Dive into the research topics where I. B. Ban’kovskaya is active.

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Featured researches published by I. B. Ban’kovskaya.


Glass Physics and Chemistry | 2007

Oxidation processes in glass-ceramic composites based on titanium boride

I. B. Ban’kovskaya

The reaction formation of TiB2-and SiO2-based composite materials and coatings upon heat treatment of initial components in air is investigated. It is shown that the glass melt formed in the course of the chemical reaction encapsulates titanium boride particles, thus imparting the high-temperature strength to the composite material. The influence of the concentration and sizes (down to a nanometer scale) of silica particles on the kinetics of oxidation of the compact samples and coated graphite during their heat treatment is studied using gravimetric, differential thermal, and X-ray powder diffraction analyses. The phase compositions of the surface layers and the bulk of the samples are determined. The compositions of coatings that ensure effective protection of graphite from oxidation in air at high temperatures are proposed.


Glass Physics and Chemistry | 2012

Oxidation processes in a silicon-boron-zirconium boride composite in the temperature range 1000–1300°C

I. B. Ban’kovskaya; I. A. Vasilyeva; D. V. Kolovertnov

Silicon, boron, and zirconium boride coatings on graphite have been obtained by thermal treatment of the initial components in air. During the course of the chemical reactions, a glass melt encapsulating (wrapping) the initial particles is formed, which makes it possible to create an air barrier preventing the diffusion of oxygen into the sample. The interactions between the components of the Si-B-ZrB2 system with oxygen and the glass-forming melt have been investigated.


Glass Physics and Chemistry | 2008

Thermogravimetric investigation of the oxidation of the ZrB2-SiO2 composite in the temperature range 800–1300°C

D. V. Kolovertnov; I. B. Ban’kovskaya; N. S. Yuritsyn

The kinetics and mechanism of high-temperature oxidation of the components of the ZrB2-SiO2 system are investigated using thermogravimetric and X-ray powder diffraction analyses. It is shown that the interaction between solid components of the ZrB2-SiO2 system, atmospheric oxygen, and the glass-forming melt can be adequately described by the equations of the formal kinetics of heterogeneous processes. The previously revealed effect of encapsulation of a high-melting compound by the glass-forming melt is confirmed. This effect manifests itself in the fact that, upon introduction of a silicon-containing component, the increment of the weight of a sample decreases as a result of the oxidation and the weight losses in the form of gaseous products decrease to almost zero.


Glass Physics and Chemistry | 2015

Kinetics of oxidation of the zirconium boride-silicon carbide composition in the air medium

D. V. Kolovertnov; I. B. Ban’kovskaya

Heat-resistant ceramic materials have been prepared based on the zirconium boride-silicon carbide composition during oxidation in the air atmosphere. The effect of the evaporation of boric oxide on the oxidation kinetics has been revealed experimentally. The electrical resistivity and dilatometric properties of the composites were determined.


Glass Physics and Chemistry | 2011

Preparation of composites in the ZrB2-Si system and investigation of their properties

I. B. Ban’kovskaya; D. V. Kolovertnov; L. P. Efimenko

The refractory glass-ceramic materials based on the ZrB2-Si composite have been prepared by nonisothermal oxidation in air, and their structure, phase composition, and properties (porosity, thermal expansion, and refractoriness) have been investigated. The composite materials have a complex heterogeneous structure: crystalline particles of the initial phases (ZrB2, Si) and the phases formed as a result of oxidation in air (ZrO2, ZrSiO4, and α-cristobalite) are encapsulated in the vitreous matrix.


Glass Physics and Chemistry | 2013

Effect of the thermal treatment mode on the composition and structure of ZrB2-SiC system composites

I. B. Ban’kovskaya; D. V. Kolovertnov

The composite materials and coatings for graphite based on a ZrB2-SiC system were obtained by the formation of a glass-forming melt in air. The effect of the heating mode on the structure and properties of the materials synthesized was shown. The coatings can be used for protecting graphite from oxidation for several hours at temperatures up to 1400°C.


Glass Physics and Chemistry | 2010

Oxidation of the zirconium boride-silicon nitride composite in the temperature range 1100–1300°C in air

A. P. Salikova; I. B. Ban’kovskaya; D. V. Kolovertnov; V. P. Popov

Composite materials and coatings based on zirconium boride and silicon nitride have been prepared by heat treatment of mixtures of the initial components in air. The chemical reactions result in the formation of the glass melt encapsulating initial particles, which provides an increased heat resistance of the material. The kinetics of high-temperature oxidation of the composite based on the ZrB2-Si3N4 system has been studied. The interaction between solid components of the ZrB2-Si3N4 system, atmospheric oxygen, and the glass melt has been described in terms of the formal kinetic equations for heterogeneous processes. Thermogravimetric, thermal, and X-ray powder diffraction analyses have been carried out, and the electrical resistivity of the compact samples has been determined.


Glass Physics and Chemistry | 2016

The influence of aluminum oxide on the heat resistance of the coatings based on the zirconium boride–silicon composite

I. B. Ban’kovskaya; M. V. Sazonova; D. V. Kolovertnov

The process of the formation of coatings based on zirconium boride, silicon, and aluminum oxide on graphite by the thermal treatment of the mixtures of the initial components in air has been studied. During the chemical reactions, a vitreous melt encapsulating the particles of zirconium boride and silicon is formed, which provides high heat resistance of the material. The effect of the composition, temperature, and mode of heating on the kinetics of oxidation of graphite samples with the coatings during their thermal treatment at 1400°C has been studied via the methods of thermogravimetric, thermal, and X-ray phase (XPA) analyses. The compositions of the coatings that effectively protect graphite from oxidation in air at temperatures of up to 1400°C have been proposed based on the results of the study.


Glass Physics and Chemistry | 2018

Effect of the Nature of the Binder on the Formation Temperature of Glass-Ceramic Coatings Based on Si–B–ZrB 2 for Graphite Protection

I. B. Ban’kovskaya; D. V. Kolovertnov; M. V. Sazonova

This work is devoted to fabricating and studying the properties of coatings based on the Si–B–ZrB2 systems used in graphite protection. The kinetics of the oxidation of graphite with coatings at different temperatures in air are investigated. The optimal conditions for the thermal treatment of the material with the coating are suggested.


Glass Physics and Chemistry | 2017

Development of works on creating coatings to protect carbon materials at high temperatures (a review of the works performed at Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences)

I. B. Ban’kovskaya; D. V. Kolovertnov

The review is based on the works by employees of the Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences (RAS). Approaches to the formation of glass-ceramic coatings on graphite have been considered from preliminarily molten glass and filler, from the mixture of initial components not containing glass during synthesis, and from silicon- and boron-containing compounds yielding a glass-forming melt upon thermal treatment in air. These works served as the basis for creating coatings of a new type.

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D. V. Kolovertnov

Russian Academy of Sciences

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M. V. Sazonova

Russian Academy of Sciences

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I. G. Polyakova

Russian Academy of Sciences

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A. E. Lapshin

Russian Academy of Sciences

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A. P. Salikova

Russian Academy of Sciences

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Dmitry Kolovertnov

Russian Academy of Sciences

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I. A. Vasilyeva

Russian Academy of Sciences

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L. P. Efimenko

Russian Academy of Sciences

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M. P. Semov

Russian Academy of Sciences

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N. S. Yuritsyn

Russian Academy of Sciences

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