Contents

Effect of energy fluxes on materials

A.Yu. Didyk

Fusion and fission nuclear reactions of chemical elements and production on novel structures
in dense gases H
2, D2 and He under irradiation with 10 MeV g-quanta....................................................................................... 5

A review of the experimental works in the field of synthesis of new elements in a dense gas (H2, D2, He)
irradiated with 10 MeV
g-quanta in the special high pressure chambers. After irradiation and opening the
chambers, a bulk of new chemical elements have been found unavailable in initial composition of the
materials in the interior of chambers. A new elements creation is explained by
g-radiation induced nuclear
reaction of He fusion in a dense gas atmosphere similar to that takes place in stars.

Keywords: high energy gamma-quanta, gaseous hydrogen, deuterium, and helium, nuclear reaction
of fission and fusion, chemical composition, scanning electronic microscopy, X-ray probe microanalysis.

 

V.V. Tcherdyntsev, E.V. Medvedeva, F.F. Makhinko, N.V. Gushchina, V.V. Ovchinnikov, S.S. Alexandrova

Effect of ion irradiation on the process of mechanical alloying of Al73Cu11Cr16 powder alloy...................................................... 20

With the use of X-ray diffraction and differential scanning calorimetry methods, the structure of Al73Cu11Cr16
alloys synthesized by mechanical alloying of ion irradiated powders and following annealing has been investigated.

It was shown that the powders ball milling results in formation of Al- and Cr-based solid solutions of Cu as well
as Al
2Cu intermetallic phase formation. Ion irradiation of the powders has effect on the rate of their interactions
only, but not on the alloys annealing behavior. Annealing results in decomposition of Al- and Cr-based supersaturated
solid solutions and formation of intermetallic phases, including the quasicrystalline one. Heating up to 500-600

leads to the single-phase decagonal quasicrystalline phase formation for all specimens studied.

Keywords: mechanical alloying, quasicrystals, phase composition, ion irradiation, heat treatment,
supersaturated solid solutions.

 

Plasmochemical methods of production and treatment of materials

G.A. Farnasov, A.B. Lisafin

Dissociation of zircon under the treatment in air RF inductive plasma....................................................................................... 29

It is shown that the treatment of zircon powder in an air RF inductive plasma leads to a full dissociation
of initial zircon particles and formation of the globules of an amorphous silica crystallized around the fine
zirconia dendrites. The broadening of the powder particles size distribution is found to be occurred after RF
plasma treatment. Plasma-induced zircon dissociation is confirmed by the results of X-ray diffraction analysis.

Keywords: zircon, RF plasma torch, heat treatment of powder, spheroidization, dissociation.

 

V.A. Koshuro, G.G. Nechaev, A.V. Lyasnikova

Effect of plasma processes of coating formation on the structure and mechanical properties of titanium.................................. 35

Changes in the structure and mechanical properties of titanium alloy have been investigated after a coating
deposition by means of plasma spraying or micro-arc oxidation methods. The structure and properties behavior
is found to be dependent on deposition method. The differences observed are explained by the thermal effect of
micro-arc oxidation process.

Keywords: functional coatings, micro-arc oxidation, plasma spraying.

 

A.V. Makharinets, Yu.N. Varzarev, L.P. Mileshko

Features of galvanostatic anodic oxidation of Si3N4-Si nanostructures in nitrate electrolyte based on ethylene glycol................ 41

Mechanisms of SiO2 anode films formation under galvanostatic anodic treatment of Si3N4-Si nanostructures
are offered which take into account the presence of limiting stage of the process due to intermediate product
(SiO) formation and its following interaction with nitrite-, nitrate-, and hydroxide-anions.

Keywords: anodic oxide films, anodic oxidation of silicon nitride, silicon nitride anodizing.

 

Functional coatings and surface treatment

Yu.V. Baldokhin

An investigation of structure transformations under oxidation of Fe specimens with different isotope composition................... 47

By Mössbauer spectroscopy, SEM, EDX, XPS, X-ray diffraction, and electrochemical measurement
methods, comparative investigations of oxidation of foil, cast, and nanopowder Fe specimens with
different isotope composition have been carried out. It is ascertained that
57Fe isotope has the better
electrochemical properties (the least dissolution current) and the most high corrosion resistance as
compared with natural iron. Effect of the avalanche-like oxidation of
57Fe isotope foil under plasma
treatment is observed.

Keywords: Mössbauer spectroscopy, Fe isotopes, corrosion, electron microscopy, electrochemistry, passivation.

 

V.V. Girzhon, T.A. Dmitrenko, I.V. Tantsyura

Effect of the substrate temperature on the formation of quasi-crystalline phase in silumin alloy
under a pulsed laser alloying...................................................................................................................................................... 57

By means of X-ray diffraction, metallographic, and microhardness measurement methods, the structure
formation in near the surface layers of silumin alloy under pulse laser alloying with Cu and Fe powders
has been investigated. Increase of the alloy microhardness after laser alloying is found to be caused by
the effects of solid-phase hardening, intermetallic phases formation, and increasing a degree of dispersion
of the structure. Heating the substrate before the laser alloying leads to decrease of quantity of quasi-
crystalline phase in the zone of laser treatment.

Keywords: laser alloying, laser treatment, silumin, microhardness, quasi-crystal, icosahedric phase,
phase composition, properties, microstructure.

 

Composite materials

N.E. Fomin, V.I. Ivlev, A.F. Sigachyov, V.A. Yudin

Mechanical cycling of composites on the base of epoxy resin with fiberglass filler..................................................................... 63

Cyclic tensile testing of composite material on the base of an epoxy resin filled with a glass fiber has been
carried out. Modulus of elasticity and work of deformation as well as its hysteresis loss was determined.

Stabilization of the composite mechanical properties is found to be occurred under cyclic loading conditions.

Keywords: composite materials, epoxy, fiberglass, elasticity, deformation, hysteresis.

 

L.A. Veshniakova, A.M. Ayzenstadt, M.A. Frolova

An evaluation of the surface activity of high-disperse raw materials for composite building materials...................................... 68

A method for determination of the surface energy characteristics of high-disperse raw rocks is proposed.
The values of the energy density and the surface activity were calculated for disperse raw materials produced
by dispersion of granite, basalt, and amphibolite rock.

Keywords: surface activity, rock, atomization energy, free surface energy, surface tension, specific surface area.

 

A.G. Zholnin, I.V. Kovaleva, M.S. Yurlova, A.M. Iliina, E.G. Grigoriev, E.A. Olevsky

An uniaxial magnetic-pulse compaction of a-Al2O3 nanopowders
and subsequent free conventional or spark-plasma sintering..................................................................................................... 73

The structure and properties of the specimens produced by magnetic-pulse compaction with following
conventional or spark-plasma sintering have been studied. It is ascertained that a fine-grain structure of
magnetic-pulse compacted specimens is retained after spark-plasma sintering. The density of compacted
and spark-plasma sintered specimens is the same as that of the sintered only ones.

Keywords: magnetic-pulse compaction, spark-plasma sintering, powder materials.

 

New methods of treatment and production of materials
with required properties

A.K. Mikitaev, G.V. Kozlov

Effect of ultrasound treatment on the structure of carbon nanotubes in polymer nanocomposites............................................. 80

Mechanisms of carbon nanotubes aggregation in polymer nanocomposites have been considered. Two types
of the aggregations are realized for these nanofillers: formation of nanotube bunches or ring-like structures.

Ultrasound affects only the second type of aggregation that is manifested in a strong (almost on order of
magnitude) increase in the radius of the carbon nanotube ring-like structures. This effect occurs only below

the nanofiller percolation threshold.

Keywords: epoxy polymer, carbon nanotubes, ultrasound treatment, aggregation, structure.

 

S.V. Stefanovsky, S.A. Dmitriev, A.A. Zherebtsov, O.I. Stefanovskaya, B.S. Nikonov

Simulation of the processes under temporary storage of the curium fraction of a high level waste............................................ 84

The processes occurring during temporary storage of the curium fraction (CF) of high level waste have been
considered and their simulation by means selection of its composition taking into account radioactive decay
of the curium isotopes and radiogenic plutonium accumulation using gadolinium and cerium as curium and
plutonium surrogates, respectively, has been carried out. Major phase transitions and compositions of intermediate
products at storage of CF for up to 70 years have been determined.

Keywords: high level waste, curium, curium fraction, gadolinium, cerium.