Contents

Effect of energy fluxes on materials

G.V. Potyomkin, .. Ligachev, M.V. Zhidkov, Yu.R. Kolobov, G.. Remnev,
M.Yu. Gazizova, S.A. Bozhko, O.A. Bureev

The change in the surface topography of magnesium under high-flux C+ ion irradiation........................................................... 5

With the help of high-resolution scanning electron microscopy, the topography of magnesium surface
has been investigated after irradiation with pulsed non-separated ion beam composed of
+i ions with
a touch of protons and
n and m neutrals is investigated. Irradiation was carried out with TEMP-4M
accelerator, energy of singly charged ions E=250 keV, pulse duration t=100 ns. It is ascertained that
the topography and structure of irradiated surface and near the surface layer are changed, and a regular
ripple (wavy) structure is formed on Mg surface. This structure consists of alternate asperities and
hollows as well as of round shape craters.

Keywords: magnesium, high power ion beam.

 

K.A. Korneeva, A.S. Sohatsky, J. O¢Connell, V.A. Skuratov, A.A. Nikitina,
Yu.I. Golovin, V.V. Korenkov, J. Neethling

Radiation hardening of ODS steels irradiated with heavy ions of fission fragment energy......................................................... 10

Effects of irradiation with 1.2 MeV/amu Xe and Kr ions on the structure and mechanical properties
of
-450 and KP4 ODS steels have been investigated. It was shown that swift heavy ion irradiation
leads to radiation hardening of ~20% in a damage dose range 0.1-1 dpa and changes in the structure
of oxide particles and ferritic matrix.

Keywords: ODS steel, high energy heavy ions, radiation defects, radiation hardening, nanoindentation.

 

Plasmochemical methods of production and treatment of materials

A.V. Samokhin, N.V. Alekseev, M.A. Sinaiskiy, Yu.V. Tsvetkov

Equilibrium energy and technological characteristics of plasma synthesis of titanium nitride,
carbide, and carbonitride from titanium tetrachloride................................................................................................................ 18

Equilibrium energy and technological characteristics of plasma synthesis of titanium nitride, carbide
and carbonitride such as final product yield and composition, energy consumption, plasma enthalpy
required are calculated for the reactions TiCl
4+xH2+yN2 (TiN synthesis), TiCl4+xH2+zCmHn
(TiC synthesis) and TiCl
4+xH2+y1N2+z1CmHn (TiCN synthesis). Calculations are carried out in the
temperature range of 500-4000 K at the total pressure in system of 0.1 MPa and in the range of
reagents ratio of x=8, x=20; y=0,5, y=5, y=20; z=0,9, z=1,0, z=1,1; y
1=5; z1=0,4, z1=0,5, z1=0,6.

Keywords: equilibrium, characteristics, reactions, plasma, energy consumption, yield, nitride,
carbide, carboninride, tetrachloride, titanium.

 

A.A. Sivkov, A.S. Ivashutenko, O.B. Nazarenko, A.S. Saigash, A.Ya. Pak, Yu.L. Kolganova

Plasmodynamic synthesis of ultradisperse copper oxide in atmospheric conditions................................................................... 25

By plasmodynamic synthesis method in the open air in coaxial magnetoplasma accelerator, ultrafine
copper oxides powders have been produced. Methods SEM, TEM, XRD and IR spectroscopy it was
shown that the annealing in air at the temperatures up to 800C leads to the changes in the phase
composition of the powder as well as formation of the nanosized product whose main crystal phase
is a copper oxide CuO.

Key words: coaxial magnetoplasma accelerator, high-temperature superconductivity, copper oxide.

 

L.Yu. Makhotkina, V.I. Khristoliubova

RF-plasma treatment induced enhancement of deformation properties of natural high-molecular materials............................ 35

Effect of RF-plasma treatment on deformation behavior of collagen-containing high-molecular
materials (natural chrome-tanned leather) has been investigated. Plasma treatment is found to
be led to enhancement of the material mechanical properties including its ability to shaping.

Keywords: natural collagen-containing high-molecular materials, deformation behavior,
RF-plasma treatment.

 

V.I. Kalita, A.A. Radyuk, D.I. Komlev, A.Y. Ivannikov

Plasma coating of steel Fe-25% Cr-6% Al.................................................................................................................................. 39

Microstructure and microhardness of Fe-25% Cr-6% Al plasma coating sprayed with a local protection
have been investigated. At an effective power of plasma stream N
eff£5 kW, the coating microhardness is
found to be ~0.7-0.8 of that of initial powder for spraying (~2.3 GPa) and is increased by ~1.7-1.8 times
under N
eff increasing up to maximum value ~10 kW. Increase of the microhardness is explained by the
coating porosity decreasing as well as strengthening of coating material under its tempering from liquid
state. When indentation load increasing from 10 to 200 g, the peak value of the coating microhardness
is decreased from ~3.5 to 2.3 GPa.

Keywords: plasma coating, spraying with a local protection, Fe-25% Cr-6% Al steel, microstructure,
microhardness.

 

I.B. Kuchmin, G.G. Nechaev, N.D. Solovyeva

Changes in plasma constitutions during the process of micro-arc oxidation and their influence
on the properties of the coatings.................................................................................................................................................. 45

Morphology and microhardness of coatings formed by micro-arc oxidation (MAO) in silicate-alkali
electrolyte on the surface of duralumin have been investigated. The model of MAO-coating growth
and sludge formation at the bottom of electrolyte bath during different stages of MAO process is
proposed. It is noted a significant thermal impact of micro-discharges on the metal which led to
occurrence of molten metal microbath in anode spot zone. Defect formation in MAO-coatings
in the batch production conditions is connected with electrolytic conduction decrease.

Keywords: electrolyte, micro-discharge, micro-arc oxidation, coating, sludge.

 

Functional coatings and surface treatment

V.M. Beresnev, O.V. Sobol, S.S. Grankin, U.S. Nemchenko, V.Yu. Novikov,
O.V. Bondar, K.O. Belovol,
.V. Maksakova, D.K. Eskermesov

Physical and mechanical properties of (Ti-Zr-Nb)N coatings fabricated by vacuum-arc deposition.......................................... 50

By vacuum-arc evaporation of multielement Ti+Zr+Nb cathode in nitrogen atmosphere, (Ti-Zr-Nb)N
coatings have been deposited on steel substrates. The coatings are characterized by a columnar structure
with nanosized (10-63 nm) crystallites of the main FCC nitride phase (Ti-Zr-Nb)N. At maximal nitrogen
pressure
N=4103 rr, an axial structure of growing (Ti-Zr-Nb)N crystals with [111] axis is formed,
and a maximal coating microhardness value about 45 GPa and adhesion strength of 67 GPa are reached.
Friction factor for the system of coatingAl
2O3 is 1.1. Such coatings seem to having prospects as
protective ones for couples of friction and cutting tools.

Keywords: coatings, vacuum-arc evaporation, diffraction spectra, nanostructure, texture, hardness,
wear, adhesion strength.

 

V.V. Semenychev, R.K. Salakhova

Deposition of galvanic coatings on internal surface of steel tubes with minor diameter............................................................. 59

By selective electroplating method with the use of special rig, galvanic Ni, Zn, or Cu coatings were
deposited on the internal pad of steel tubes with a minor diameter and a length up to one meter.
Thickness of the coatings deposited can be controlled by variation of the technological process
quality. Metallographic cross-section investigations show that the coatings repeat of the tube
internal surface relief, and all microdefects on this surface are covered with the coatings.
Dependence of the coating thickness on deposition time has been ascertained.

Keywords: galvanic coatings, rubbing electroplating, coating deposition on internal pad
of tubes with minor diameter.

 

Composite materials

A.K. Mikitaev, G.V. Kozlov

Effect of the structure of filling compounds on reinforcing degree of poly(methyl
methacrylate)/functionalized carbon nanotubes nanocomposites................................................................................................ 65

Effect of functionalization of filling compounds on the structure and properties of polymer/carbon
nanotubes nanocomposites has been studied. This effect is observed only to critical structural transition
behavior when closed ring-like structures formation is occurred and percolation threshold for carbon
nanotubes is achieved. Macroscopic properties of the nanocomposites are dependent on efficiency of
stress transfer from polymer matrix to filling nanoparticles.

Keywords: nanocomposite, carbon nanotubes, functionalization, stress transfer, reinforcing degree.

 

New methods of treatment and production of materials
with required properties

Yu.N. Devyatko, V.V. Novikov, O.V. Khomyakov, D.A. Chulkin

A model of uranium dioxide thermal conductivity........................................................................................................................ 70

The existing models of uranium oxide thermal conductivity are analyzed. Abnormal growth of
thermal conductivity of oxide nuclear fuel in high temperature region is explained. Models of
specific heat at the constant volume and thermal conductivity of uranium dioxide are proposed.
It is shown that the contribution from charge carriers degrees of freedom into observed thermal
conductivity of pure stoichiometric UO
2 can be neglected up to melting point.

Keywords: uranium dioxide, phonon spectrum, electrons contribution to the thermal conductivity,
thermal conductivity, thermal diffusivity.

 

Y.S. Glazkova, S.N. Kalmykov, I.A. Presnyakov, A.V. Sobolev, O.I. Stefanovskaya,
S.V. Stefanovsky, M.B. Remizov, P.V. Kozlov, R.A. Makarovsky

Iron oxidation state and local environment and hydrolytic durability
of milticomponent aluminum-iron-phosphate glasses................................................................................................................. 82

Iron oxidation state and coordination environment in model gasses simulating vitrified high level
waste were determined by Mössbauer study. In the samples with relatively low concentrations of
transition elements major iron is present as Fe(III) in octahedral oxygen surrounding. At high
concentrations of transition metal oxides iron is partitioned among vitreous (10-15%) and crystalline
phases (85-90%). In the first of them major iron exists as Fe(III) supposedly in octahedral environment;
in the second of them as Fe(II) and Fe(III) also octahedrally coordinated and participating in the
fast electronic exchange mFe
3++nFe2+mFe2++nFe3+. Leach rates of Cs ions from boron free
glasses were found to be at a level of 110
5 g/(cm2day) and lower while for Fe by nearly
3 orders of magnitude lower. After annealing leach rate and cumulative release increased by several
times while the boron-containing glasses exhibited lower hydrolytic durability.
Leach rate and
cumulative release of Fe after annealing exhibited minor changes.

Keywords: aluminum-iron phosphate glass, high level waste, hydrolytic durability, iron,
Mossbauer effect, oxidation state, X-ray diffraction.

 

 

V.P. Danenko, L.M. Gurevich

Effect of aluminizing on properties of carbon steel at high temperatures.................................................................................... 92

By energy-dispersive X-ray spectroscopy, depth distribution of intermetallic phases in diffusion layer
of aluminized carbon steel has been ascertained. It is shown that the levels of nonuniformity of
deformation of micro-volumes in the coating and transition zone under high temperature creep are
dependent on Al depth distribution in diffusion layer. Deformation nonuniformity has an effect on
mechanical properties of the steel, too. Mechanical properties of aluminized steel and fracture behavior
of the surface layer in the temperature range 600-1000C were investigated.

Keywords: aluminizing, diffusion layer, energy-dispersive spectroscopy, intermetallic phase,
mechanical properties, microhardness, interface, deformation, nonuniformity of deformation,
stress concentration, cracks.