Contents

Effect of energy fluxes on materials

A.A.Kolotov, D.V.Surnin, V.A.Volkov, V.Ya.Bayankin

Surface segregations and changes of the structure and microhardness
of amorphous Fe80P13C7 tapes under Ar ion irradiation........................................................................................................... 5

Effect of ion irradiation (Ar+, E=10-40 keV) on radiation-induced segregation processes in the surface
layers, microhardness, and structure changes in amorphous Fe
80P13C7 tapes has been investigated. It is
shown that the structure and composition of the alloy are dependent non-monotonically on the ion energy.
The most appreciable structure relaxation and element redistribution in amorphous phase before its
crystallization were occurred under a low-energy irradiation of the alloy investigated.

Keywords: ion irradiation, amorphous alloys, crystallization, phase transformations.

 

Plasmochemical methods of production and treatment of materials

A.V.Samokhin, S.N.Polyakov, A.G.Astashov, N.V.Alekseev, Yu.V.Tsvetkov

Simulation of the process of nanopowder synthesis in a jet-type plasma reactor.
II. Nanoparticles formation......................................................................................................................................................... 12

Formation of nanoparticles of materials with very different phase transformation temperatures (W, Cu, Al2O3)
in a plasma jet reactor has been simulated with the use of recently proposed CFD model. Calculation results for
W nanoparticles have a good agreement with experimental data, while the results for alumina have some
differences as compared with experiment. There is a strong difference between simulation results and
experimental data for Cu nanoparticles, particularly under the high mass flow rate of condensed phase.

Keywords: simulation, CFD, plasma reactor, nanoparticles formation.

 

V.N.Arustamov, Kh.B.Ashurov, Kh.Kh.Kadyrov, I.Kh.Khudaykulov

Modification of the surface of rolled steels by plasma of vacuum-arc discharge........................................................................ 18

Modification of the surface layers of metallic parts under vacuum-arc treatment and cleaning has been
investigated. Optimal conditions of the treatment as well as surfactant effect on the specific power inputs
under electric arc cleaning are determined.

Keywords: vacuum-arc discharge, cathode spot, vacuum-arc cleaning, surface, microhardness, roughness,
elemental composition, surfactant.

 

Functional coatings and surface treatment

O.D.Volpian, A.I.Kuzmichev, Yu.A.Obod

Magnetron technology of production of gradient optical coatings.............................................................................................. 25

Magnetron sputtering systems for deposition of dielectric layers with gradient variation of refraction index
have been considered. Technology of gradient coatings production based on the use of two-magnetron system
working in the regime of medium-frequency pulsed ion sputtering is presented. Under constant composition of
gas medium and invariable magnetron work mode, the required profile of refraction index distribution in coating
is achieved by the substrate movement between two magnetrons. The process is conducted under laser and
plasma assisting and carried out with in situ optical checking.

Keywords: magnetron sputtering, gradient optical coating, gradient variation of refractive index.

 

V.K.Verkholomov

Experimental estimation of hydrophobic properties of different roofing coatings....................................................................... 33

Hydrophobic properties of different roofing coatings are studied. It is shown that the value of interfacial angle
sufficient to exhibit of a surface unwettability is significantly depended on the temperature of coatings. Water
meniscus around the local area with unwettable coating has been obtained experimentally. Height of meniscus
for graphite powder coating is ~4.5 mm. The curved surface of the water meniscus have enhanced attraction of
dirt and powder fine particles.

Keywords: unwettable coating, interfacial angle, meniscus of water, graphite powder.

 

Composite materials

V.I.Kuzmin, V.I.Lysak, P.A.Kharlamov

Effect of kinematic parameters of explosive welding on the structure
and properties of composites with diffusion barrier.................................................................................................................... 38

Peculiarities of the joining formation as well as effects of explosion welding kinematic parameters on the
structure and properties of steel-aluminum composites with different diffusion barriers (layer of nitrided
steel, chromium sublayer) have been considered.

Keywords: explosion welding, composite, diffusion barrier, impact velocity, strength of joint.

 

New methods of treatment and production of materials
with required properties

S.V.Stefanovsky, A.A.Zherebtsov, S.A.Dmitriev

The problem of the choice of matrix for controlled storage of Cm fraction with the ability
of following extraction of accumulated Pu. II. Host phases for curium....................................................................................... 44

The major phases potentially suitable for immobilization of curium extracted at partitioning of high level
waste from spent nuclear fuel reprocessing are reviewed. From point of view of isomorphic capacity with
respect to curium and its analogs, radiation resistance and chemical durability, the phases with fluorite and
fluorite-derived structures (pyrochlore, zirconolite, murataite) as well as the perovskite, monazite and apatite
type phases has been shown to be the most suitable for a long-term storage and ultimate disposal. For interim
storage of curium fraction following by extraction of accumulated plutonium the perovskite-type phases
including rare earth-REE perovskites and glass seem to be the most promising.

Keywords: apatite, interim storage, garnet, curium, monazite, murataite, perovskite, pyrochlore, glass, fluorite.

 

D.Yu.Kukushkin, N.N.Ostroukhov, A.Yu.Tyanginsky, M.V.Tserulev

Pure hydrosols of metals: concentration of single hydrated atoms
and formation of epitaxial structures on the crystal surface........................................................................................................ 86

Contribution of an atomic component in the optical extinction spectrum in the range l=0.2 mm is ascertained
for the hydrosols of metals produced by the method of pulsed electric discharge in liquid. Effect of the Ag single
crystals formation on the surface of solids immersed in silver hydrosol has been determined.

Keywords: hydrosols of metals, electric discharge in liquids, extinction spectrum, formation of monocrystal structures.