Contents

Effect of energy fluxes on materials

D.N. Demidov, E.A. Smirnov

Effects of impurities on the rate of radiation creep and vacancy swelling in Fe-based austenite alloys........................................ 5

In the framework of the model of radiation-enhanced diffusion in the systems with impurities, effects

of the formation of vacancy-impurity atom complexes on accumulation and annealing of radiation

defects, rate of the growth of vacancy voids, and radiation creep in Fe-based austenite alloys have been

investigated. The temperature dependencies of a steady-state concentration of radiation point defects,

vacancy complexes concentration, and effective coefficient of radiation defects mutual recombination

in materials with impurity complexes with a different bonding energy were calculated. It is shown the

possibility of the suppression of the vacancy swelling and radiation creep effects due to formation of

vacancy-impurity atom complexes in possession of a high bonding energy.

Keywords: radiation-enhanced diffusion, vacancyimpurity complexes, austenite steels, radiation creep,

vacancy swelling.

 

V.M. Borisov, V.A. Kuzmenko, V.B. Mikhailov, A.Yu. Sapozhkov, V.N. Trofimov, A.A. Yakushkin

Effect of exposure to UV excimer laser radiation on the surface of cladding from E110 zirconium alloy................................... 13

Effect of the pulse-periodic UV laser irradiation (λ=248 and 308 nm) on the surface of E110 zirconium alloy

gas been investigated.It is shown that the changes in the structure and phase composition of the surface layers

of treated alloy are caused by laser irradiation, and corrosion-resistant coating is formed on the surface. More

than fourfold decreasing the value of local depth of oxidation of E110 alloy in the time of high-temperature air

oxidation (1100C, 15 min) is found to be occurred after the alloy treatment with UV laser irradiation.

Keywords: excimer laser, UV radiation, E110 zirconium alloy, corrosion-resistant coating.

 

I.N. Tsymbalov, K.A. Ivanov, R.V. Volkov, A.B. Saveliev, L.S. Novikov, L.I. Galanina,

N.P. Chirskaya, V.Yu. Bychenkov, A.I. Chumakov

Laser-plasma sources of ionizing radiation for simulation of radiation effects

in microelectronic materials and components............................................................................................................................. 25

Characteristics of the X-ray and gamma pulses as well as pulsed proton fluxes induced by the action of

femotsecond laser pulse (800 nm, 1018 W/cm2) on the surface of liquid gallium and solid molybdenum targets

have been measured. Estimated calculations show the possibility in principle an availability of these ionizing

radiation sources for experimental simulation of a single event radiation effects in advanced microelectronic

components with a high integration degree.

Keywords: laser pulse, plasma, femtosecond pulse, radiation effects, large-scale integration circuit,
spectrum, nuclear reaction, electronics, single radiation effects.

 

Plasmochemical methods of production and treatment of materials

D.I. Komlev, V.I. Kalita, A.A. Radyuk, A.V. Kasimtsev, S.N. Yudin, T.A. Sviridova, A.Yu. Ivannikov

Plasma coatings sprayed from Nb-Al intermetallic powders...................................................................................................... 31

By means of metallothermic (calcium-hydride) method, Nb3Al intermetallic powders were produced from

which the powders for plasma spraying were prepared. It was ascertained that in the process of plasma spraying

with a local protection, the phase composition of the powders are changing. Oxygen and nitrogen contents in

sprayed coatings are increased and aluminum content decreased compared to that in initial powders.

Keywords: calcium hydride method, intermetallic compounds, niobium aluminides, fine powder, plasma spraying.

 

Functional coatings and surface treatment

O.D. Volpian, A.I. Kuzmichev

Fast atom scattering from the metal targets in ion technologies of optical coatings production................................................. 40

Using the TRIM code, backscattering (reflection) coefficients of Ar, N, O ions from the surface of metal targets

(Al, Nb, Si, Ta,Ti, Fe, Zn) have been calculated. It is shown that at the ions energy ~100-1000 eV, the value of

the coefficient of backscatter ing from the light metals is a few percent, and from the heavy metals - tens of percent.

Coefficient of backscattering of 1 keV self neutral atoms is found to be equal ~1-2% that considerably less than

the self-ion sputtering coefficient values for the same ion- target systems and ion energy. It is concluded that the

process of fast neutral particles backscattering must be taking into ac count under analysis of the sputtering of

metals by oxygen and nitrogen ions used in the technologies of optical coatings deposition.

Keywords: ion scattering, backscattering, sputtering, ion-beam technology of optical coatings deposition.

 

 

D.A. Romanov, E.N. Goncharova, E.A. Budovskikh, V.E. Gromov, Yu.F. Ivanov, A.D. Teresov

Elemental and phase composition of TiB2-Mo coating sprayed on a steel by electro-explosive method..................................... 47

Elemental and phase composition of the surface layer of Hardox 450 steel with a composite TiB -Mo coating

sprayed by electro-2 explosive method have been investigated after pulsed irradiation with intense electron

beam of submillisecond duration. Electron- beam treatment conditions leading to dense, high lustre surface

formation with a submicrograin structure on the base of titanium diboride and nickel are ascertained. It is shown

that an electron-beam treatment under melting rate leads to formation of the surface layer with homogeneous

structure and uniform concentration distribution.

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

 

Composite materials

A.G. Zholnin, I.V. Kovaleva, P.N. Medvedev, E.G. Grigoriev, E.A. Olevsky, M.G. Isaenkova,
P.L. Dobrokhotov

Peculiarities of the free sintering of δ- and α-Al2O3 nanopowders after magnetic pulse compaction.......................................... 53

By X-ray diffraction, X-ray phase analysis, SEM, thermal analysis, and dilatometry methods, the processes

of a free sintering of alumina nanopowders compacted by a conventional or uniaxial magnetic pulse techniques

have been investigated. It is ascertained the controlling mechanisms of the sintering processes are different for

nanopowders compacted in a variety of ways.

Keywords: pulse magnetic compaction, free sintering, powder materials, alumina.

V.V. Kudinov, I.K. Krylov, V.I. Mamonov, N.V. Korneeva

Increase in impact toughness of carbon fiber reinforced plastics............................................................................................... 64

By means of Impact Break method, effect of the ratio of the carbon fibers (CF) and ultra-high molecular weight

polyethylene (UHMWPE) fibers contained in a hybrid fiber on the impact toughness and strength of the hybrid

composition materials (HCM) has been investigated. At the ration of CF:UHMWPE=50:50, HCM impact

toughness and strength values were increased by a factor of 2 and 1,5 respectively. At the ratio CF:UHMWPE=

=20:80, the carbon- and UHMWPE-fibers in HCM are no longer deformed and broken down simultaneously.

At first CF and then UHMWPE fiber are broken down. Effect of the delay of destruction of HCM on the base

of CF and UHMWPE-fibers is ascertained.

Key words: impact toughness, impact break (IB) method, ultimate tensile strength, hybrid fiber, carbon fiber,

UHMWPE-fibers, hybrid composite materials.

 

New methods of treatment and production of materials
with required properties

L.E. Bodrova, A.G. Meilakh, E.A. Pastukhov, E.Yu. Goyda

Dispersion hardening of copper with plated particles of chromium and niobium carbides........................................................ 68

Effect of the chemical and chemical-thermal cladding of NbC and Cr3C2 powders with nickel and copper on the

structure and properties of cast and powder Cu-1% Cr3C2(NbC) alloys gas been investigated. It is found that for

obtaining strengthened Cu- Cr3C2 alloys it is better to use chromium carbide powder clad with nickel, and applies

a casting technique. Powder metallurgy technology has an advantage in production of copper alloys hardened by

copper-clad NbC particles. The copper shell provides better adhesion of reinforcing particles with the metal matrix

during sintering and densification of the alloy.

Keywords: carbides, powders, metallization, low-frequency processing of melts.

V.L. Lisin, V.A. Kostylev, G.A. Dorogina, L.B. Vedmid

Comparative analysis of the magnetic properties of powder Fe-Cr-Co hard magnetic materials produced

under different process-dependent parameters........................................................................................................................... 76

Effect of the mode of heat- and thermo-magnetic treatments on the magnetic properties of Fe-31% Cr-23% Co

powder alloy has been investigated. The homogenization and following quenching of the alloy is found to be

exerted the greatest positive influence on a coercive force value. Isothermal annealing and thermo-magnetic

treatment only affect the saturation magnetization and residual one values.

Keywords: hard magnetic material, homogenization, isothermal annealing, thermo-magnetic treatment, coercive

force, residual magnetization, saturation magnetization.

 

V.G. Shepelevich, L.P. Shcherbachenko

Microstructure of rapidly solidified In-21 at.% Bi alloy.............................................................................................................. 82

Microstructure and texture of rapidly solidified In-21 t.% Bi alloy have been investigated by X-ray diffraction,

electron probe microanalysis, and SEM methods. Structure of the foils is found to be consisted of In precipitates

and In Bi intermediate phase. In and In2Bi phases have a microcrystalline structure and textures (001)+(110)

and (10 12) + (10 11) respectively. Textures of the phases are remained under annealing at 60C in the course

of 1 h.

Keywords: bismuth, indium, microstructure, grain structure, texture, high-speed crystallization.

N.N. Ostroukhov, A.Yu. Tyanginsky

Effect of reversible phase transition liquidsolid on the structure and properties of uncontaminated

metal hydrosol ............................................................................................................................................................................ 88

It is ascertained experimentally, the mean size of metal particles is decreased from 20-50 to 3-5 nm under

consecutive freezing - unfreezing of uncontaminated metal hydrosol produced in a pulsed electric discharge

between the silver electrodes in distilled water. After such treatment, typical for colloidal Ag absorption

band close to λ=0,4 m is disappeared, hydrosol solution becomes colorless, a negative ζ-potential of the

particles is increased, and biocide activity of the solution is increased by a factor 50-100.

Keywords: metal hydrosol, phase transition liquidsolid, crushing of particles, extinction spectra,

function of particle size distribution.

 

R.A. Zakharyan, V.A. Kreisberg, B.S. Lunin

Vacuum degassing of volatile components from the thermostable industrial adhesives.............................................................. 94

By means of kinetic thermodesorption mass-spectrometry, specific degassing rates of volatile components

in vacuum for some thermostable industrial adhesives used in electronic instrument engineering have been

measured. The data obtained allows to determine the residual atmosphere characteristics in a long-life

vacuum electronic devices with interior adhesive joints.

Keywords: specific degassing rate, adhesive, residual gases.