ФОРМИРОВАНИЕ ПОКРЫТИЯ С ОТКРЫТЫМИ, ВЕРТИКАЛЬНО ОРИЕНТИРОВАННЫМИ ПОРАМИ

И.В. Синёв, А.В. Смирнов, С.Д. Сякина*, А.И. Гребенников, В.В. Симаков, В.В. Кисин

Саратовский государственный университет им. Н.Г. Чернышевского
*Саратовский государственный технический университет

FORMATION OF A COVERING WITH THE OPEN, VERTICALLY ALIGNED PORES

I.V. Sinev, A.V. Smirnov, S.D. Syakina*, A.I. Grebennikov, V.V. Simakov, V.V. Kisin

State Educational Establishment of Higher Professional Education, N.G. Chernyshevsky Saratov State University
* Saratov State Technical University

МОДЕЛЬ МЕХАНИЗМА ОБРАЗОВАНИЯ ГОРЯЧИХ И ХОЛОДНЫХ ПЯТЕН УЛЬТРАФИОЛЕТОВЫХ МИШЕННЫХ МУТАЦИЙ

Е.А. Гребнева

Донецкий физико-технический институт НАН Украины ул. Р. Люксембург, 72, г. Донецк, Украина, 83114

MECHANISM FORMATION HOT AND COLD SPOTS OF ULTRAVIOLET TARGETED MUTATIONS MODEL

Helen A. Grebneva

Donetsk Physical and Technical Institute, NAS of Ukraine 83114 Donetsk, Ukraine

ИССЛЕДОВАНИЕ ФИЗИЧЕСКИХ СВОЙСТВ СВЧ КЕРАМИЧЕСКИХ МАТЕРИАЛОВ ДЛЯ МАЛОГАБАРИТНЫХ АНТЕНН

А. И. Акимов, Г.К. Савчук, А.К. Летко

Государственное научно-практическое объединение “Научно-практический центр НАН Беларуси по материаловедению ”, Республика Беларусь, г. Минск

Dielectric properties of ceramic materials of the Zn2TiO4-TiO2 binary system are studied. The influence of the Sn+2, Sb+3, Bi+3 doping ions on dielectric properties of ceramic samples of the Zn2TiO4 -TiO2 system is investigated. It is found that the high-frequency dielectric materials with  <30 and tg of about 0.0001 can be prepared by modifying the Zn2TiO4-TiO2 ceramics. It is shown that the modified ceramics of the Zn2TiO4-TiO2 system have great potential for development of microwave devices including compact ceramic antennas.

РЕНТГЕНОСТРУКТУРНЫЕ ИССЛЕДОВАНИЯ ХИМИЧЕСКИ ОСАЖДЕННОГО ТИТАНАТА БАРИЯ

1А. И. Акимов, 1Г.К. Савчук, 1А.К.Летко, 2С.В. Костамаров

1Государственное научно-практическое объединение “Научно-практический центр НАН Беларуси по материаловедению ”,
Республика Беларусь, г. Минск
2Институт технической акустики НАН Беларуси, Республика Беларусь, г. Витебск

The peculiarities of the crystal structure of powder barium titanat prepared by the Clabaugh and Merker method are studied. It is shown that the application of the Clabaugh and Merker method allows to govern the grains size of the powders and their crystal structure.

ИСПОЛЬЗОВАНИЕ МЕТОДА МЕХАНОАКТИВАЦИИ ДЛЯ ПОЛУЧЕНИЯ КЕРАМИЧЕСКИХ ДИЭЛЕКТРИЧЕСКИХ МАТЕРИАЛОВ
НА ОСНОВЕ СИСТЕМЫ Ba0.4Sr0.6(R0.5Nb0.5)O3 (R= Ho, Er, Tm, Yb и Lu)

Л.А. Близнюк, А.А. Климза

Государственное научно – производственное объединение «Научно – практический центр НАН Беларуси по материаловедению»,
Республика Беларусь, г. Минск

В настоящей работе представлены результаты исследования диэлектрических керамических материалов на основе системы BaхSr1-х(R0.5Nb0.5)O3, где R= Ho, Er, Tm, Yb и Lu, полученных с помощью механической активации. Изучено влияние механической активации твердого раствора на фазовый состав, температуру спекания, микроструктуру и диэлектрические свойства. Показано, что применение механической активации, влияет на физико-химические свойства твердых веществ, в том числе на реакционную способность.

ТИКСОТРОПНЫЕ СВОЙСТВА ВЫСОКОКОНЦЕНТРИРОВАННЫХ СУСПЕНЗИЙ
МЕХАНОХИМИЧЕСКИ МОДИФИЦИРОВАННОГО УГЛЯ

Д.П. Савицкий, В.И. Лазаренко, А.С. Макаров

Институт коллоидной химии и химии воды им. А.В. Думанского, Киев, Украина

The rheological and thixotropic properties of water-coal suspension on the base of sub-bituminous mechanochemical modification coal with sodium lignosulfonate and alkali have been studied. The influence adsorption of sodium lignosulfonate on coal on fluidity and thixotropy has been investigated. It has been proved the structure-mechanical barrier plays important role in the process of thixotropic fluidity.

ИЗУЧЕНИЕ СТРУКТУРНЫХ ПРЕВРАЩЕНИЙ ПРИ НАГРЕВЕ СПЛАВОВ Cr-C, ПОЛУЧЕННЫХ ИМПУЛЬСНЫМ ЭЛЕКТРООСАЖДЕНИЕМ

А.С.Баскевич, Н.Ю.Филоненко.

Украинский государственный химико-технологический университет, Днепропетровск, Украина

THE STUDY OF HEAT STRUCTURAL CHANGES OF Cr-C ALLOYS ELECTRODEPOSITED BY PULSED CURRENT

A.S. Baskevich, N.Yu. Philonenko

Ukrainian State University of Chemical Engineering

The structure and thermal stability of electrodeposited by pulsed current Сr100-ХCХ alloys (х=8,10,12) are examined by methods of X-ray, electron microscopical and differential thermal analysis. As a result of isothermal annealings there is revealed the fact that the end products of breakdown under crystallization of amorphous Cr-C films are equilibrium phases Cr and Cr23C6. It is established that within given concentration interval the crystallization beginning is shifted into higher temperature range as carbon content increases. It is shown that nonequilibrium conditions for crystallization under electrodeposition by pulsed current have an essential effect on the processes of structural relaxation.

ВЛИЯНИЕ ДАВЛЕНИЯ НА ТИП ФАЗОВОГО ПЕРЕХОДА МЕЖДУ КИНЕТИЧЕСКИМИ РЕЖИМАМИ ГРАНИЧНОГО ТРЕНИЯ

Я.А. Ляшенко1, Л.С. Метлов2, А.В. Хоменко1, С.Н. Чепульский1
1Сумский государственный университет
2Донецкий физико-технический институт им. А.А. Галкина НАН Украины

EFFECT OF PRESSURE ON THE TYPE OF PHASE TRANSITION BETWEEN THE KINETIC MODES OF BOUNDARY FRICTION

I.A. Lyashenko1, L.S. Metlov2 , A.V. Khomenko1, S.N. Chepulskyi1

1 Sumy State University, 40007, Sumy, Ukraine

2Donetsk Institute for Physics and Engineering named after A.A. Galkin of the
NAS of Ukraine, 83114, Donetsk, Ukraine


A thermodynamic model describing the behavior of an ultrathin lubricating material film confined between two atomically-smooth solid surfaces is proposed. As the order parameter the excess volume is chosen whose value increases with melting and subsequent fluidization of lubricant. It is shown that the external pressure, applied perpendicularly to the friction surfaces, influences crucially on lubricant behavior. Phase diagram with domains of different friction regimes is built.

АМОРФНЫЕ КОМПОЗИТЫ ОРГАНОФОСФАТОВ КАЛЬЦИЯ-МАГНИЯ И КАРБОКСИМЕТИЛЦЕЛЛЮЛОЗЫ

К.И. Иманбеков, Тамтиева К., Курбанова Г.И.

АО “Институт химических наук им. А.Б. Бектурова”, Республика Казахстан г. Алматы

The results of the synthesis and study of some physico-chemical properties of nanoscale organophosphate biocomposites based on carboxymethyl-cellulose and amorphous calcium-magnium monophosphathe Ca1,0Mg0,43(PO4)0,95 with an atomic ratio Mg/(Mg+Ca)=0,35. It is shown that the synthesized substance during the heating to 450 оС are dehydration and decom-position of organic part, while maintaining the amorphous nature and structure of microporous inorganic matrix.

OPTICAL PROPERTIES OF ZnSe FILMS

Sofronova E.M. (1), Sofronov D.S. (1), Starikov V. (2), Opanasyuk A. (3)

(1)SSI STC “Institute for Single Crystals” NAS of Ukraine, 60 Lenin Ave., 61001 Kharkov, Ukraine
(2) National Technical University "Kh.P.I.", Kharkov, Ukraine
(3) Sumy State University, 2 Rimsky-Korsakov str., 40007 Sumy, Ukraine

The materials with wide band gap are ubiquitous component of modern technology with considerable interest in the electronic and optical devices. Zinc selenide (ZnSe) is one of the important materials as a buffer layer in copper indium selenide (CIS)-based solar cells, compare to
CdS buffer layer because of better conformity of lattice parameter and non-toxicity. Also, it has potential applications in red-, blue- and green-light-emitting diodes, photovoltaic, laser screens, thin-film transistor, photoelectrochemical cells.
The microwave method for purification of zinc selenide initial solt using for films preparing was applied. ZnS powder of white color with structure wurtzite and with the particle’s size about some micron was synthesized. By X-ray analysis data the ZnSe had a cubic lattice (а=5,665±0,002Å).
Optical properties of the films were investigated by doble-beam spectrophotometer in the range of wavelenght λ = 340…1200 nm at room temperature. The investigation of optical characteristics of condensates demonstrated that for the wavelenght λ greater than 350-360 nm significant enhancement of the transmission coefficient occurred and for λ greater than 490-500 nm all the films had a very high transmission coefficient that was increased to 70-85 %. The analysis shows that the maximal value of the optical transmission have the ZnSe films obtained on the substrate with temperature Ts =473 K, the minimal value corresponds to the Ts =773 K. It can see oscillation of curvers of reflection dependence from wave length that testify to thickness homogeneity of investigated films.

ЗЕРНОВА СТРУКТУРА РЕВЕРТОВАНОГО АУСТЕНІТУ В СПЛАВІ 60Н23, СФОРМОВАНА В РЕЗУЛЬТАТІ --ПЕРЕТВОРЕННЯ

В.Ю. Данільченко, В.В. Тарасов

Інститут металофізики ім. Г.В. Курдюмова НАН України, Київ

GRAIN STRUCTURE OF THE 60N23 ALLOY REVERTED AUSTENITE FORMED BY --TRANSFORMATION

V.Ju. Danilchenko, V.V. Таrasov

G.V.Kurdyumov Institute of Metal Physics NAS of Ukraine

Change of the heating rate of tempered carbon Fe-Ni alloys in the reverse --transition interval within 0,03-80 degrees/min allowed to control the diffusionless/diffusive ratio of its mechanism components. The heating rate decrease less than 1,0-0,5 degrees/min led to the diffusive component realization of the --transition, to the reverted austenite structure refinement by the increase of the initial -phase crystallographic orientations and to the increase of the its stabilization rate relatively to the next direct --transition.

МАГНІТОМЕТРИЧНІ ДОСЛІДЖЕННЯ ТОНКИХ СТРІЧОК ЗАЛІЗОНІКЕЛЕВИХ СПЛАВІВ

В.Ю. Данільченко, Р.М. Делідон

Інститут металофізики ім. Г. В. Курдюмова НАН України

MAGNETOMETHRIC INVESTIGATION OF THIN RIBBONS OF THE Fe-Ni ALLOYS

V.Ju. Danilchenko, R.М. Delidon

G.V.Kurdyumov Institute of Metal Physics NAS of Ukraine

There are stabilizing effect of austenite was observed in comparison with massive alloys of the same chemical composition in the thin ribbons of Fe-Ni alloys. Reducing of the completeness of γ-α-transformation was due by the grinding of the grain structure of the austenite during rapid solidification and by the formation of the significant volume fraction of γ-phase of ultrafine and nanoscale grains, in which the martensitic transformation was completely suppressed.

ВПЛИВ НЕОДНОРІДНОСТІ МІКРОСТРУКТУРИ ШВИДКОЗАГАРТОВАНИХ ЗАЛІЗОНІКЕЛЕВИХ СПЛАВІВ НА ХАРАКТЕРИСТИКИ МАРТЕНСИТНИХ ПЕРЕТВОРЕНЬ

Є.М. Дзевін

Інститут металофізики ім. Г. В. Курдюмова НАН України

EFFECT OF MICROSTRUCTURE HETEROGENEITY OF HIGHSPEED-QUENCHED Fe-Ni ALLOYS ON THE CHARACTERISTICS OF MARTENSITE TRANSFORMATIONS

Ie.М. Dzevin

G.V.Kurdyumov Institute of Metal Physics NAS of Ukraine

Сrystal structure and mechanism of crystallization of Fe-Ni alloys were studied by methods of X-ray diffraction and metallography. It has been found that macro- and microstructure of austenitic alloy was essentially heterogeneous at the contact and free surface and in the volume of a ribbon. The indentified distinctions of the austenitic phase in local areas of ribbon are attributed to different cooling rates of the melt crystallization conditions.

НЕСТАЦИОНАРНЫЙ НЕСИММЕТРИЧНЫЙ ТУННЕЛЬНЫЙ ПЕРЕХОД

Д. В. Абдулкадыров, Н. Н. Белецкий

Институт радиофизики и электроники им. А. Я. Усикова НАН Украины, Харьков, Украина

THE NON-SIMETRIC, NON-STATIONARY TUNNEL JUNCTION

D. V. Abdulkadyrov, N. N. Beletskii

The tunneling of electrons through a nonstationary tunneling junction in the framework of the one-quantum electron tunnel transition ap-proximation is investigated. The effect of the thermal energy distribution of electrons in the emitter and collector of the tunnel junction is taken into account. The dependence of the high-frequency electron current on the frequency and applied dc bias voltage is found. The influ-ence of the barrier asymmetry on the active and reactive parts of the high-frequency electron current is studied.