Contents

Effect of energy fluxes on materials

Yu.A. Kashlev

Statistical theory of a hydrogen atom diffusion in the metals
with close-packed lattice taking into account a 4 order anharmonicity......................................................................................... 5

Using the data on the quantum states and the interaction mechanisms of impurity atom with metals,
hydrogen transport are studied: high-temperature hopping. Anharmonicity of hydrogen atom vibration
is shown to be had an effect on the relaxation processes due to the interference with phonon scattering.

Keywords: diffusion, hydrogen atom, close-packed lattice, metal, shape of potential, over-barrier hopping.

 

F.I. Ahmedov, S.M. Eyubova, A.D. Kuliyev

Effect of g-irradiation on dielectric properties of the composites on the base of polypropylene and ZrO2 ................................. 14

Effect of the content of ZrO2 filler on g-irradiation induced changes of dielectric properties of polypropylene
based composites has been investigated. Electrophysical properties of the composites is found are irradiation
dose and filler content dependent. The data of IR-spectroscopy shows that
g-irradiation of the polymer
composite results in formation of defects in the form of carbonyl groups.

Keywords: dielectric, composite, polypropylene, g-irradiation, radiation modification, zirconium oxide,
polyolefin, filler.

 

A.E. Ligachev, Yu.R. Kolobov, M.V. Zhidkov, V.E. Golosov, G.V. Potyomkin, G.E. Remnev

Pulsed ion beam induced changes in a submicrocrystalline structure of near the surface layers
of the austenite steel..................................................................................................................................................................... 19

The topography and structure of near the surface layers of submicrocrystalline Cr-Ni austenite steel
type 321 have been investigated after the pulsed irradiation with C
+ and H+ ions. Modification of near
the surface layers is the result of the ion beam irradiation. Formation of the structure close to an ultrafine
equiaxed one is found to be occurred in modified layers.

Keywords: ion irradiation, high pulse ion beams.

 

V.L. Vorobyev, P.V. Bykov, V.Ya. Bayankin, S.G. Bystrov, V.E. Porsev, O.A. Bureyev,
A.A. Shushkov, A.V. Vakhrushev

Changes in the composition and hardness of near the surface layers of carbon steel during increasing
an accelerating voltage under a pulse irradiation with Cr
+ ions................................................................................................. 26

Effect of accelerating voltage (20, 30, 40 kV) of pulsed irradiation with Cr+ ions on the hardness and
composition of the surface layers as well as the surface morphology of carbon steel has been studied.

Maximal concentration of implanted Cr is found to be decreased from 22 to 13 at.% as accelerating
voltage is increased from 20 to 40 kV. Formation of Cr
2O3, CrO2, CrO3, FeO, and Fe2O3 oxides was
observed in the surface layers of ion-irradiated steel. The hardness of the 250 nm thick surface layer
was increased by 20% after ion irradiation with an accelerating voltage of 20 kV.

Keywords: ion implantation, chemical composition, hardness.

 

M.M. Nikitin

High power DC impulse magnetron sputtering.......................................................................................................................... 32

A review of the modern methods of magnetron sputtering with the use of DC pulses with power densities by two
orders of magnitude greater than that in continuous sputtering. The advantage of this method is the possibility of
initiation of the flows of high-ionized plasma and realization of the ion-activated mode of deposition. By varying
the pulse peak power, duration, and repetition rate, high-energy ion flows can be produced like those in the case
of using of arc-discharge evaporators. Modulation of single pulses stabilizes the processes of formation and
development of high-current discharges. Relatively low rate of deposition can be increased by controlled changes
in the configuration of magnetron magnetic field. Application of pulsed mode of sputtering in DC discharges solves
the problem of arcing under magnetron reactive sputtering and thus improves the quality of deposited coatings.

Keywords: High Power Pulsed/Impulse Magnetron Sputtering (HPPMS/HiPIMS), Modulated Pulse Power
Magnetron Sputtering (MPPMS), ion-activated deposition, frequency, length of the pulse, duty factor,
deposition rate, reactive pulsed magnetron sputtering.

 

N.G. Dzhumamukhambetov, A.S. Dautova

Reasons for band edge fluctuation in AIIIBV semiconductors modified by laser irradiation......................................................... 45

Band edge fluctuation in the laser irradiated AIIIBV semiconductors is shown to be resulted from the laser-induced
processes of recombination and generation of carriers due to superposition of the both electrostatic- and deformation-
type fluctuations.

Keywords: semiconductors, laser irradiation, energy bands, recombination and generation of carriers,
dopant distribution, defects, band edge fluctuation.

 

Plasmochemical methods of production and treatment of materials

A.A. Nikolaev, D.E. Kirpichyov, A.V. Nikolaev, Yu.V.Tsvetkov

Thermodynamic analysis of Nb and rare-earth metals extraction from loparite concentrate under plasma-arc heating........... 49

Thermodynamic analysis of high temperature treatment (up to 4000 K) of loparite concentrate with the aim
of extraction of refractory and rare-earth metals has been carried out. The results of calculations of evaporation
of the elements from pure concentrate and from its mixture with carbon are presented. The possibility of separation
of the refractory and rare-earth metals while reduction of the concentrate is shown.
The scheme of production
of ferroniobium from loparite concentrate
with the energy-material and economical estimation of the process
is considered.

Keywords: loparite, plasma, thermodynamics, niobium, rare-earth metals.

 

A.V. Dunaev, D.A. Alyakin

Kinetics and mechanisms of interaction of HCl/Ar (Cl2, H2) plasma with GaAs surface............................................................ 56

Kinetics and mechanisms of plasma chemical etching of GaAs in the mixtures of HCl-Ar, HCl-Cl2 and HCl-H2
in a DC glow discharge have been investigated. As hydrogen chloride is diluted with hydrogen or argon, the rate
of GaAs etching is reduced more intense than concentration of chemically active species decreased. With increasing
a chlorine content in HCl/Cl
2 mixture the etching rate increases to a maximum value at ~70% Cl2, and then decreases.
Activation energies of the etching in all gas mixtures are close to the values characteristic of reactions controlled
by the processes of the surface adsorption-desorption. Etching in the mixtures with hydrogen provides a good surface
quality, but the rate of the process is very low, a high etching rate is achieved in the mixtures with chlorine, however,
the surface roughness exceeded allowable in this case. An optimum combination of the surface quality and rate of the
process is secured in HCl/Ar gaseous mixture.

Keywords: kinetics, plasma chemical etching, plasma, hydrogen chloride, gallium arsenide.

 

E.V. Kartaev, V.P. Lukashov, S.P. Vashchenko, S.M. Aulchenko, O.B. Kovalev, D.V. Sergachev

Plasma-chemical synthesis of a fine TiO2 powder by chloride method........................................................................................ 62

Experimental investigations of the gaseous-phase synthesis of submicro- and nanosized particles of TiO2 powder
from TiCl
4 vapor in plasma-chemical flow reactor have been carried out. Effects of the synthesis parameters on
the particle agglomerates formation were studied, and the process conditions for production of the particles with
specified dispersion and anatase or rutile crystalline structure are ascertained. A satisfactory fit of experimental
data with the results of numerical simulation is obtained.

Keywords: plasma-chemical synthesis, chloride method, ultrafine titania powder, process control,
phase composition.

Functional coatings and surface treatment

D.A. Romanov, O.V. Olesyuk, E.A. Budovskikh, V.E. Gromov, Yu.F. Ivanov, A.D. Teresov

Structure of electro-explosive sprayed TiB2-Cu composite coatings after electron-beam treatment............................................ 73

Effect of the pulsed electron-beam treatment with melting of the surface (40-60 J/cm2, pulse duration 150-200 s,
10-30 pulses) on the elemental and phase composition as well as on the structure defects of electro-explosion
250-300 m thick TiB
2-Cu composite coatings deposited on the surface of electrolytic copper grade M00 has been
investigated. It is shown that the electron-beam treatment leads to formation of the mirror pore-free surface layers
of 30-50 m in thick, which have a composite structure filled with titanium diboride and copper. The size of TiB
2
particles in remelting layer is decreased by 2.0-2.5 times compared to as-sprayed ones and varied from 0.5 to 2.0 m.

Keywords: electro-explosive spraying, electron-beam treatment, titanium diboride, copper, structure.

 

V.D. Vlasenko, Yu.I. Mulin

Formation of wear- and heat-resistant coatings on the surface of Ti alloys by electro-sparking alloying.................................. 79

The process of formation and properties of wear- and heat-resistant coatings from a new electrode materials
on the surface of Ti alloys have been investigated. Technological parameters determining the coatings properties
as well as an effectiveness of the formation of high-strength, two-layered, gradient coatings were ascertained.

Keywords: electro-sparking alloying, titanium alloys, durability, heat resistance, technological parameter.

 

V.V. Girzhon, V.N. Kovalyova

The structure of the surface layers of silumin after pulse laser alloying with Co and Ni............................................................ 85

Structure of the surface layers of silumin alloy after pulsed laser alloying with a mixture of Co and Ni powders
has been investigated by X-ray and metallographic analysis. It is shown that a high dispersion of the structure
components in the laser alloying zone and formation of the high-strength intermetallic phases, including a
quasicrystalline decagonal one, lead to an increase of microhardness values in 3-4 times.

Keywords: quasi-crystalline decagonal phase, laser alloying, intermetallic phase, quenching from the
liquid state, microstructure.

 

Composite materials

V.I. Pavlenko, L.N. Naumova, O.D. Edamenko, A.V. Noskov, I.V. Sokolenko

Modified nanotubular chrysotile for radiation-protective composite material production.......................................................... 91

Hydrosilicate nanotubes filling with heavy metal compounds during its interaction with heavy metal salt
solutions at temperatures up to 100C has been investigated. Method of PbWO
4 deposition into the
nanotubular chrysotile structure and on its surface has been developed. A new material on the chrysotile-
asbestos basis containing up to 30 wt.% PbWO
4 with high radiation-protective properties is obtained.

Keywords: radiation protection, composite material, hydrosilicate nanotubes, filling, heavy metals,
lead tungstate.

 

New methods of treatment and production of materials
with required properties

A.V. Shokodko, K.B. Kuznetsov, K.A. Shashkeev, S.V. Shevtsov, A.I. Ogarkov, I.A. Kovalev, A.V. Kostyuchenko,
N.A. Ovsyannikov, G.P. Kachanov, A.I. Sitnikov, G.Yu. Yurkov, A.S. Chernyavsky, K.A. Solntsev

Laboratory setup for the synthesis of ceramic and ceramic-metal composite by resistive heating method................................. 97

Potential of upgraded laboratory setup for the synthesis of ceramics in the process of oxidation and nitridation
is presented. Modification of the working gas supply unit and the unit of resistive heating control taking into
account the changes of phase composition of the specimens improves the accuracy of gas precursor batching
as well as reproducibility of the phase composition and structure of synthesized ceramic and metal-ceramic
materials.

Keywords: ceramics, compact nitrides, oxidative construction, resistive heating, gas supply, programmable
logic controller (PLC).