CONTENTS

Effect of energy fluxes on materials

B.A. Kalin, N.V. Volkov, R.A. Valikov, A.S. Yashin

Analysis of the ion mixing process during alloying of Zr tube outer surface under Ar+ ions bombardment ................................ 5

The process of the alloying of Zr substrate due to ion mixing with impurity atoms (Fe, Al) implanted into the

substrate during bombardment of deposited Fe(Al) films by Ar+ ions with a wide energy range (0.5-8.0 keV)

with fluences of ~1018-1019 cm2 has been amalysed. Nonuniformity of the fluence dependence of the surface

roughness Ra was ascertained, the value of which sharply decreased from 1.75 to 0.63 mm at fluence of

~1018 cm2 and next increased up to 0.91 μm at ~1019 cm2.

Keywords: ion treatment, ion mixing, zirconium, Zr-1% Nb alloy.

 

V.S. Polenok, O.G. Sidorenko, G.V. Shevlyakov

An investigation of the changes in the geometry sizes of U-Gd claddings operated in VVER-1000 nuclear reactor .................... 9

Changes in the geometry of U-Gd oxide fuel rods operated from 1 to 6 years were studied. The cladding tensile

strain caused by pelletcladding interaction was reached ~0.9% and the structure of the cladding in the maximal

tensile strain section is the same as for the nearest ones.

Keywords: uranium-gadolinium oxide fuel, cladding, geometry parameters, strain.

 

N.M. Vlasov , V.A. Zaznoba

Diffusion migration of fission gases products in nuclear fuel with inhomogeneous heat generation ......................................... 15

Diffusion migration of fission gases products in the singly connected fuel systems with inhomogeneous heat

generation is investigated. Mathematical modeling was carried out with taking into account the temperature

gradients and thermal stresses. The results of theoretical analysis can be interested for substantiation to use of

several of uranium compounds as fuel in nuclear power. Emphasis on the nitride and dioxide fuel systems is

placed.

Keywords: nuclear fuel, thermal stresses, diffusion migration, inhomogeneous heat.

 

Plasmochemical methods of production and treatment of materials

Al.F. Gaisin

An investigation of the effect of a low temperature plasma of vapor-gas discharges with the use

of electrolytic electrodes at lower pressure on the complex shape goods ................................................................................... 22

Effects of mechanical, electrochemical, laser, and electrolytic plasma treatment on the morphology and grade

of finish of the outside and face surfaces of the stator rings from electrical steel have been investigated with the

use of X-ray diffraction analysis.

Keywords: electrolytic plasma treatment, low-temperature plasma, liquid electrolytic electrodes,

vapor-gas discharges, stator rings, surface morphology.

 

E.Kh. Isakaev, A.S. Tyuftyaev, M.Kh. Gadzhiev

Effect of the opening angle of a gas-discharge path on the plasmotron power efficiency ........................................................... 27

To increase the stability of discharge arc the experimental studies of plasma generator with divergent channel of

an output electrode were carried out. It is shown that the optimum opening angle of flow of 6 between the inside

wall of the channel and the channel axis leads to increased stability of the arc in comparison to a cylindrical

channel with constant cross section.

Keywords: plasma torch, divergent channel, outlet angle, plasma cutting.

 

Composite materials

S.V. Kryuchkova, M.Yu. Yablokova, A.V. Kepman, E.N. Voronina, L.S. Novikov, V.N. Chernik, Yu.V. Kostina

Introduction of diamond charge into polymer films to improve their resistance to atomic oxygen ............................................ 31

Polymer composites based on polyimide Extem and polysulfone PSK-1 and their modifications with highly

dispersed carbon filler (diamond charge) have been exposed to atomic oxygen flow with an average energy of

20 eV. The mass erosion yields of samples were calculated, and the comparative analysis of the film stability

was performed. The changes in morphology of polymer surfaces after exposure were studied with scanning

electron microscopy. It was shown that increasing the filler content in polymer matrix has improved polymer

resistance to the atomic oxygen attack.

Keywords: atomic oxygen, polyimide, polysulfone.

 

V.A. Artyukh, V.S. Yusupov, V.A. Zelensky, M.S. Kholin, R.S. Fakhurtdinov

The structure characteristics of mechanically alloyed Al-Fe powder composite ........................................................................ 39

The literature data on the use of functional composite materials on the base of Al-Fe intermetallic compounds

are presented. Advantages of a solid-phase technology of aluminides production (mechanical alloying + thermal

synthesis) compared to the liquid-phase one have been noted such as a low energy consumption and better

control of the structure and phase composition of material. By metallographic methods, a distribution of Al and

Fe in the powder composite structure was ascertained. It is shown that the use of Al powder fraction of 60-80 μm

and Fe powder fraction of 20-40 μm is reasonable for production of the composite material with a more uniform

distribution of Fe component. From the results of microhardness measurements it follows that a significant strain

hardening of Al and Fe particles is occurred under the mechanical alloying.

Keywords: Al-Fe powder composite, mechanical alloying, powder fraction, powder components

distribution in composite, microhardness, strain hardening.

 

A.S. Ustyukhin, M.I. Alymov, P.M. Krishenik, Yu.V. Levinsky, S.A. Rogachev

An investigation of Cr distribution in Fe-Cr-Co alloy during vacuum sintering ........................................................................ 46

Hard magnetic Fe-Cr-Co alloys alloyed with Mo and W were produced by powder metallurgy method. Weight

loss of specimens and appearing the inhomogeneity in elemental composition of the alloys are found to be

occurred after the sintering process due to Cr evaporation from the surface. It leads to worsening the functional

properties of material sintered. Mathematical model for simulation of processes of Cr diffusion and evaporation

during sintering was proposed. The results of numerical simulation are in a qualitative agreement with

experimental data obtained by microprobe analysis method. The most intense evaporation of Cr takes place

during the first moments of sintering.

Keywords: powder metallurgy, hard magnetic Fe-Cr-Co alloys, sintering, evaporation, diffusion,

mathematical simulation.

 

M.E. Savvinova

Polymer composites for electrotechnical purpose ....................................................................................................................... 52

By X-ray diffraction analysis and scanning electron microscopy methods, the processes of the structure formation

in compounds on the base of butadiene-nitrile rubber with different fillers have been investigated. Mechanisms of

formation of electroconductive polymer composites are offered.

Keywords: electroconductive polymer composite material, butadiene-nitrile rubber, structure,

temperature coefficient of resistance.

 

New methods of treatment and production of materials with required properties

O.E. Osintsev, S.Ya. Betsofen, V.V. Vasenev, V.N. Mironenko, V.N. Butrim

An investigation of the effect of kinetic and thermodynamic factors on the structure, properties,

and technological specificities of manufacturing of deformed semi-finished products

from rapidly quenched aluminum alloy of Al-Si-Ni system ......................................................................................................... 57

By means of optical, electron scanning and transmission microscopy, and X-ray microanalysis, the phase

composition and structure of rapidly quenched powder Al-Si-Ni alloys have been investigated. It is shown that

the main difference in the structure of the alloys is a different dispersivity of the same structure components.

Operating practices for stepwise vacuum annealing of the alloy studied was developed with the help of which

the compacted and extruded semi-finished products with satisfactory mechanical properties were manufactured.

Keywords: hypereutectic Al-Si-Ni alloy, rapid crystallization, powder metallurgy, mechanical alloying.

 

I.I. Tashlykova-Bushkevich, Yu.S. Yakovenko, V.G. Shepelevich, I.S. Tashlykov

Effects of composition and microrelief on the wetting behavior of the surface of rapidly solidified Al-In foils ........................... 65

Morphology and wettability of rapidly solidified foils of pure Al (99.99%) and Al-In alloys (0.35, 0.7, 1.4, 4.7 at.%

In) have been investigated by the sessile drop method and atomic force microscopy. All of the foil surfaces showed

hydrophilic properties instead of pure Al foil. The value of contact angle varies from 35.8 to 78.5 for the alloys.

Correlation between the values of the surface roughness and contact angle was considered in the framework of the

Wenzel-Deryagin and the Cassie-Baxter models. The possibility of production of rapidly solidified Al alloys with

controlled wettability is demonstrated.

Keywords: wetting, rapid solidification, Al-In alloys, atomic force microscopy, morphology.

 

M.I. Lerner, I.A. Gorbikov, O.V. Bakina, S.O. Kasantzev

Deagglomeration of nanostructured aluminum oxyhydroxide

under the shock-wave loading during electro-hydraulic discharge ............................................................................................ 73

The patterns of the deagglomeration of aluminium oxyhydroxide nanosheets under the electro-hydraulic discharge

were studied. The higher efficiency of deagglomeration process under electro-hydraulic discharge was ascertained

compared to that during ultrasonic impact. The most significant factor influenced on the nanosheets deagglomeration

is the time of the discharge energy release which determines the intensity of cavitation in water. Destruction of

initial nanosheets under the used parameters of electric pulses was not observed.

Keywords: deagglomeration, electro-hydraulic discharge, nanostructures, hard agglomerates, nanosheets.

 

V.I. Kapustin, I.P. Lee, V.S. Petrov, N.E. Ledentsova, N.I. Polushin, I.Y. Kuchina, E.S. Zakharova

Physics and chemistry of formation and electronic structure of oxide-barium phase in oxide cathodes .................................... 81

X-ray diffraction and derivatography methods, the phase transitions in barium carbonate in different atmospheres:

air, argon, carbon dioxide and vacuum have been investigated. Effect of the atmosphere on the temperature range

and the nature of phase transitions are ascertained. By optical absorption and high-resolution electron spectroscopy,

the electronic structure of barium oxide produced by thermal decomposition of barium carbonate is determined.

Keywords: barium oxide, barium carbonate dissociation, electronic structure, electron spectroscopy,

thermionic emission.