Microstructure and phase composition of the cast Ti15.5Zr30Mn38V5.5Cr5.5Со5.5 alloy as well hydrogenation dehydrogenation products are investigated using methods x-ray analysis scanning electron microscopy.As established, due to partial replacement manganese with cobalt, it is not possible expand area existence Laves (type C14), since, in studied alloy, a second intermetallic based on Zr2Co compound formed.As determined, change does affect significantly kinetics hydrogen absorption...

tiMn 2 -Based interMetallic alloys for hydrogen accuMulation: ProBleMs and ProsPects the main advantages of as an energy carrier in comparison with currently used hydrocarbons are determined.By comparing disadvantages available methods storage, it was proved that storage a bound state (hydrides) provides largest amount stored per unit weight container is safest method.As shown, based on AB 2type intermetallics most promising materials safe transportation state.

Структура и водородсорбционные свойства сплава (Ti 0,34 Zr 0

Hydrogen storage properties of Ti-Zr-Mn eutectic alloys with the formula Ti 0.475 Zr 0.3 Mn 0.225 were evaluated at ambient temperature and 565 °C using a Sieverts-type device.The initial studied by means SEM-EDS technique, X-ray diffraction DTA.The phase compositions crystal structures hydrogenation products determined.The product obtained room consisted an ε ε-hydride tetragonal structure ThH 2 type (a = 0.455 nm, c 0.469 nm) Laves phase-based hydride MgZn -type 0.5587± ± ±0.0005 0.9135±...

Оттиски доступны непосредственно от издателя Фотокопирование разрешено только в соответствии с лицензией 2015 ИМФ (Институт металлофизики им.Г. В. Курдюмова НАН Украины

Fe-Mn-Ti alloys located along the line joining TiMn 2 and TiFe in isopleth with 14 at.%Fe between 33.3 45 at.%Ti have been studied using DTA X-ray diffraction.The polythermal section -TiFe has constructed.It is quasibinary a cigar-type fusion diagram.The composition dependence of crystallographic cell parameters obeys Vegard rule.The existence sharp bend on Ti-rich boundary Ti(Mn,Fe) field at was not confirmed.Ti(Mn,Fe) / Laves phases Phase diagram

Влияние частичной замены марганца хромом на структуру и кинетику гидрирования сплава основе интерметаллида (Ti, Zr)(V, Mn) 2 -x Т. В. Прядко, А. Дехтяренко Институт металлофизики им.Г. Курдюмова НАН Украины, бульв.Акад.Вернадского, 36, 03142 Киев, Украина Методами оптической микроскопии рентгеновского фазового анализа изучены микроструктура фазовый состав литого Cr, x , а также продукта гидрирования.Установлено, что частичная замена не приводит к изменению структуры состава сплава, даёт...

The microstructure and phase composition of a cast Ti 15.4 Zr 30.2 Mn 44 V 5.4 Сr 5 alloy obtained using titanium sponge, as well the hydrogenation product, are investigated by scanning electron microscopy X-ray analysis.As found, complete replacement expensive iodide with relatively cheap sponge does not affect structure alloy.As shown, saturation hydrogen occurs at room temperature pressure 0.21 MPa in short time up to capacity 2.12% mass.

Методами сканирующей электронной микроскопии и рентгеновского фазового анализа изучены микроструктура фазовый состав литых сплавов системы Ti-Zr-Mn-V, а также продуктов их гидрирования.Установлено, что легирование ванадием эвтектического сплава 47,5Ti-30Zr-22,5Mn смещает эвтектическую бинодаль в сторону ОЦК-твёрдого раствора, тем самым расширяя область существования фазы Лавеса.Показано, при взаимодействии с водородом (метод Сивертса) образуются гидриды только на основе сосуществующих фаз,...

Влияние V на структуру и фазовый состав эвтектического сплава Ti 0,475 Zr 0,3 Mn 0,225

On the example of alloy Ti 15.4 Zr 30.2 Mn 44 V 5.4 Сr 5 , technological scheme producing massive ingots by technique induction melting in open Al 2 O 3 crucibles, which can be used industry, is developed.This ensures absence significant interaction between crucible material and melt, while maintaining allowable content aluminium impurities alloy, thus achieving required structure, phase composition, hydrogen storage properties.

The formation of carbon-containing composites based on metals opens the prospect combining advantages their components and manifesting new electrophysical properties, which are not characteristic original materials.Mechanical synthesis hydrogenated titanium (TiH) thermally expanded graphite (TEG) powders leads to such formation.As shown, increase by 1.65 6.3 times in electrical conductivity is observed comparison with TiH TEG components, respectively.It due an free electrons because...

The effect of an RE element (holmium) on the phase composition, microstructure, and hydrogen absorption properties multiphase alloys Ti-Zr-Mn-V system comprised Laves b.c.c.solid solution is studied.It found out that holmium practically does not dissolve in initial phases alloy, it forms a new combination with oxygen, oxide.The crystallites oxide precipitate surface solution.It determined formation leads to change structure from eutectic multiphase, causes increase grain area constituents.It...

The phase composition and crystal structures of heterophase Ti-Zr-Mn-V alloys were studied by scanning electron microscopy X-ray diffraction.The structure the as-cast annealed consisted a Laves bcc solid solution.It is shown that interact with hydrogen at room temperature pressure 0.23 MPa an incubation period 6-10 min duration absorption process 10 min.The resulting sorption capacity was more than 2 wt.%.Additional processing obtained hydrides could increase capacity.Hydrogen storage /...

The research is aimed at studying the complex effect of alloying and protective coating on resistance titanium to embrittlement in a hydrogen environment.When determining complex, elements are selected that reduce rate interaction with hydrogen-containing medium increase maximum allowable concentrations.The AlN applied by helicon-arc ion-plasma sputtering chosen as barrier layer.The dynamics accumulation studied Sievers' method mode heating isothermal exposure pressure 0.6 MPa temperature...