Nanopowders obtained by evaporating initial substances in an electron accelerator at atmospheric pressure

Бардаханов, С. П.; Korchagin, A. I.; Kuksanov, N. K.; Lavrukhin, A. V.; Salimov, R.A.; Фадеев, С. Н.; Cherepkov, V.V.

doi:10.1134/s1028335806070044

Cited by 39 publications

(23 citation statements)

References 2 publications

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“…For example, nanopowders of metals obtained in an electron accelerator (RF Patent No. 2067077) [1] by evaporating the initial materials exhibit high catalytic characteristics [2], and nanosize silicon powders exposed to ultraviolet radiation re-radiate in the visible blue-green part of the spectrum [3].…”

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confidence: 99%

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Ceramic from nanopowders and its properties

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“…Tarkosil nanopowders T-05, T-15, T-20, and T-25 [1] with specific density 50 -220 m 2 /g and average particle size from 13 to 60 nm were used in the present investigations. Figure 1 shows an example of the data obtained with the transmission electron microscope for T-20 nanopowder.…”

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Ceramic from nanopowders and its properties

et al. 2008

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“…The vapors are then transported by argon gas from the evaporation chamber to a condensation chamber where the vapors condense into nanoparticles which are caught in a filter. However, the formation of nanoparticles is not the subject of this article and more detailed descriptions of this process can be found in [2,3,5].…”

Section: Treatment Conditions Of the Copper Ingot Used For The Synthementioning

confidence: 99%

“…For more than 20 years, the Khristianovich Institute of Applied and Theoretical Mechanics (KITAM) has been working in collaboration with the Budker Institute of Nuclear Physics (BINP), both institutes part of the Siberian Branch of the Russian Academy of Sciences (SB RAS), in order to obtain nanopowders from various substances by evaporating the materials using an electron beam [1][2][3]. The electron beam is generated by a high-voltage ELV type accelerator [4].…”

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Channel Structures Formed in Copper Ingots upon Melting and Evaporation by a High-Power Electron Beam

Бардаханов

Nomoev

Schreiber

et al. 2015

Metals

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A new phenomenon is described in this paper: the formation of macroscopic channel structures on the bottom of copper ingots which were used as the target for the synthesis of copper nanoparticles by high-power electron beam evaporation and condensation. In the synthesis experiment, the cylindrical copper ingot is melted and partially evaporated in a graphite crucible. The channel structures were originally observed after a series of nanoparticle synthesis experiments in varying conditions. In the present work, various process conditions are varied in order to recreate the structures and identify their mechanism of formation. Conditions in which the channel structures form and do not form are identified and interesting microstructures are observed near the channel structures. OPEN ACCESSMetals 2015, 5 429

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“…These powder modifi ers were prepared by evaporation of starting materials in an electron accelerator followed by condensation of substances in the form of nanodispersed particles by the method described in [4]. This enamel is intended for protecting the surface of chromium-nickel alloy steels and does not contain linked oxides (Co, Ni, Cu).…”

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Development of High-Temperature Nanostructured Silicate-Enamel Coatings for Enamelling Engineering Metalware

Kazak

Didenko²

2016

Metallurgist

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The article considers high-temperature enamel coatings prepared from charges synthesizing enamel with a suffi ciently high fi ring temperature and providing the required protective properties and heat resistance. Brief scientifi c and experimental research is given for the coatings obtained based on compositions modifi ed with additions of refractory fi llers added in the form of nanosize oxide powders. Keywords: high-temperature protective coatings, heat resistance and thermal stability, thermal expansion coeffi cient, composite coatings, steel protection from gas corrosion.One method for protecting apparatus and equipment from gas corrosion is application to their surface of heat-resistant or high-temperature coatings.A number of specifi cations are laid down for high-temperature protective coatings. They should be continuous and impenetrable for a corrosive medium, exhibit good adhesive strength with metal, not worsen the production properties of the base material, etc.High-temperature coatings of two types are used: heat-resistant and thermally stable. Heat-resistant coatings are resistant to the action of corrosive media, being at a temperature not lower than 650°C (start of red incandescence). For a thermally stable coating, this temperature is above the operating limit.Formation of high-temperature multifunctional coatings is accomplished at comparatively high temperature of the order to 1200-1400°C, which in many cases leads to a reduction in strength and other properties of the metal protected by a coating. Therefore, a task arose of preparing coatings with improved or good heat resistance with a comparatively low formation temperature, characterized simultaneously by an increased value of the thermal expansion coeffi cient (TEC), playing an important role in creating heat-resistant coatings [1]. It is controlled by adding nanosize metal oxide powders and is selected in relation to the metal being protected.High-temperature heat-resistant coatings may be simple (single-component) or complex. The authors have carried out research aimed at preparing oxide coatings of the following types: crystalline (entirely or as a basis of composite or glassy-crystalline), and sitallized glass enamel.Composite high-temperature coatings are a combination of a glass matrix and refractory fi ller, distinguished by good operating and physicochemical properties as a result of combining the composition of multicomponent silicate enamels with refractory or chemically stable fi llers [2]. They are used in order to protect low-carbon, unalloyed, and alloy steels, nickel,

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Nanopowders obtained by evaporating initial substances in an electron accelerator at atmospheric pressure

Cited by 39 publications

References 2 publications

Ceramic from nanopowders and its properties

Ceramic from nanopowders and its properties

Channel Structures Formed in Copper Ingots upon Melting and Evaporation by a High-Power Electron Beam

Development of High-Temperature Nanostructured Silicate-Enamel Coatings for Enamelling Engineering Metalware

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