International Center for Electron Beam Technologies of E.o. Paton Electric Welding Institute

State Enterprise “international Center for Electron Beam Technologies of E.o. Paton Electric Welding Institute of National Academy of Sciences of Ukraine”

Boris Movchan

Boris E Paton

Jury E Rudoy

Iurii Kurapov

Oleg Ja Gavriljuk

Leonila M Nerodenko

The inventive method for producing nanoparticles for ferrofluids by electron-beam evaporation and condensation in vacuum, consists in evaporating an initial solid material and in fixing nanoparticles to a cooled substrate by means of a solidifiable carrier during vapour condensation, wherein a solid inorganic material, which is selected from a group containing metals, alloys or oxides thereof, is used as an initial material and a solid liquid-soluble material is used as a magnetic carrier material for fixing nanoparticles. The method also consists in simultaneously evaporating the initial material and the carrier composition by electron-beam heating. The vapour is deposited on the substrate, the temperature which is lower than the melting point of the carrier material, and the condensate of the magnetic material nanoparticles, which have a size and are fixed in the carrier, is produced. The particle size is adjusted by setting the specified temperature of the substrate during vapour deposition.

Method for producing nanoparticles for magnetic fluids by electron-beam evaporation and condensation in vacuum, a magnetic fluid producing method and magnetic fluid produced according to said method

An electron beam gun comprises a beam waveguide and an accelerating anode fixed thereto. The accelerating anode is connected with the aid of high-voltage insulators and through a cathode plate to a cathode assembly. The cathode assembly comprises a linear hot cathode fixed with the aid of two cathode carriers and a focussing electrode which is coaxially arranged with respect to the linear hot cathode and encompasses it with the aid of a two-sided surface. The beam waveguide is separated from the accelerating anode with the aid of rack panels which rigidly fix the accelerating anode to the beam waveguide in such a way that a space is formed therebetween. In order to hermetically separate cathode and anode parts of the projector, the accelerating anode is provided with a plate rigidly connected thereto.

Electron beam projector provided with a linear thermionic emitting cathode for electron beam heating

The invention relates to a method and apparatus for the production of protective coatings on parts. A coating formed in accordance with the invention has a chemical composition and structure gradient across its thickness. The coating is obtained by heating of a composite ingot including a body and at least one insert disposed within the body. As the composite ingot is heated it sequentially evaporates to produce a vapor with a chemical composition varying over the evaporation time period. The composition of the body and composition and location of the insert within the body function to determine the chemical composition of the vapor at any time. Condensation and/or deposition of the vapor onto a substrate forms the inventive coating.

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Kyiv, Ukraine

Boris Movchan