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1.
A. I. Voronin V. T. Bublik N. Yu. Tabachkova Yu. M. Belov 《Journal of Electronic Materials》2011,40(5):794-800
In this work, we used x-ray structural diagnostic data to reveal the formation of structural regularities in profiled polycrystalline
ingots based on Bi and Sb chalcogenide solid solutions. In Bi2Te3 lattice crystals, the solid phase grows such that the cleavage surfaces are perpendicular to the crystallization front. The
crystallization singularity determines the nature of the growth texture. Because texture is an important factor determining
the anisotropy of properties, which in turn determines the suitability of an ingot for production of modules and the possibility
of figure of merit improvement, its diagnostics is an important issue for technology testing. Examples of texture analysis
using the method of straight pole figure (SPF) construction for profiled crystals are provided. The structure of the surface
layers in the profiled ingots was studied after electroerosion cutting. In addition, the method of estimation of the disturbed
layer depth based on the nature of texture changes was used. 相似文献
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V. T. Bublik A. I. Voronin E. A. Vygovskaya V. F. Ponomarev N. Yu. Tabachkova O. V. Toropova 《Inorganic Materials》2011,47(14):1563-1568
An analysis of anisotropy of the properties of a Bi2Se0.3Te2.7 solid solution was carried out using construction of demonstrative surfaces for thermoelectric effectiveness and thermal
expansion coefficients. It is shown that the texture is an important factor forming anisotropy of properties and technological
fitness of ingots for manufacturing modules. Anisotropy of properties based on the studies of the ingot textures obtained
using the float-zone method and Bridgman method (growing thermoelectric plates in a flat cavity) was studied. 相似文献
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Conclusions The possibility has been shown of using a Zeiss leucometer for obtaining a comparative reproducible index of the whiteness of fibres processed with OB. The reflection factor of the light from the samples with a blue colour filter can serve as such an index.Klin Combine. All-Union Correspondence Institute of Textile and Light Industries (VZITLP). Translated from Khimicheskie Volokna, No. 6, pp. 64–65, November–December, 1969. 相似文献
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Aleshin A. N. Bugaev A. S. Ruban O. A. Saraikin V. V. Tabachkova N. Yu. Shchetinin I. V. 《Semiconductors》2019,53(8):1066-1074
Semiconductors - On the basis of data on X-ray structural analysis performed by the method of reciprocal-space mapping and investigations using secondary-ion mass spectrometry and transmission... 相似文献
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Structure and conductivity of yttria and scandia‐doped zirconia crystals grown by skull melting
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Mihail A. Borik Sergey I. Bredikhin Vladimir T. Bublik Aleksej V. Kulebyakin Irina E. Kuritsyna Elena E. Lomonova Philipp O. Milovich Valentina A. Myzina Vyacheslav V. Osiko Polina A. Ryabochkina Nataliya Y. Tabachkova 《Journal of the American Ceramic Society》2017,100(12):5536-5547
In this paper a detailed study of the (ZrO2)1‐x(Y2O3)x (x=0.025–0.15), (ZrO2)1‐x(Sc2O3)x (x = 0.06 – 0.11) and (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y (x=0.07 – 0.11; y=0.01 – 0.04) solid solution crystals grown by skull melting technique is presented. The structure, phase composition, and ion conductivity of the obtained crystals were investigated by X‐ray diffraction, transmission electron microscopy, Raman scattering spectroscopy, and impedance spectroscopy. Maximum conductivity as (ZrO2)1‐x(Y2O3)x and (ZrO2)1‐x(Sc2O3)x solid solution crystals is observed for the compositions containing 10 mol% stabilizing oxide, and the conductivity of 10ScSZ is ~3 times higher than for 10YSZ. Experiments on crystal growth (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y solid solutions showed that uniform, transparent crystals 7Sc3YSZ, 7Sc4YSZ, 8Sc2YSZ, 8Sc3YSZ, 9Sc2YSZ, 9Sc3YSZ, 10Sc1YSZ, and 10Sc2YSZ are single phase crystal containing t″ phase. It is established that a necessary condition of melt growth of (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y single‐phase crystals is the total concentration of the stabilizing oxides from 10 to 12 mol%. The addition of Y2O3 affects the (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y solid solution conductivity different ways and depends on the Sc2O3 content in the starting composition. The effects of structure, phase composition, concentration, and type of stabilizing oxides on the electrical characteristics of obtained crystals are discussed. 相似文献
6.
V. D. Demcheglo A. I. Voronin N. Yu. Tabachkova V. T. Bublik V. F. Ponomaryov 《Semiconductors》2017,51(8):1021-1023
The property anisotropy in Bi2Se0.3Te2.7 alloy is analyzed by constructing index surfaces for the thermoelectric figure of merit and thermal expansion coefficient. Texture is an important factor forming the property anisotropy and technological applicability of an ingot for fabricating modules. The property anisotropy is analyzed based on studying the texture in ingots produced by the modified Bridgman method (thermoelectric plate growth in a flat cavity). Analysis of the texture shows that not only the crystallization rate, but also the crystallization cavity design is an important factor for the proposed crystallization method, affecting the formation of the thermoelectric-material structure. As the plate thickness is decreased by changing the heat removal conditions in a thin gap, a more perfect structure can be obtained. 相似文献
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L. L. Rokhlin E. A. Luk’yanova N. Yu. Tabachkova T. V. Dobatkina I. E. Tarytina I. G. Korol’kova 《Russian Metallurgy (Metally)》2017,2017(3):193-199
The effect of dysprosium added in the amounts such that it does not form an individual phase in equilibrium with solid magnesium on the decomposition of the supersaturated magnesium solid solution in Mg–Sm alloys is studied. The presence of dysprosium in Mg–Sm alloys is found to retard the decomposition of the supersaturated magnesium solid solution and to increase the hardening effect upon aging. When these alloys are aged, dysprosium is partly retained in the magnesium solid solution and partly enters into the compositions of the phases that form during the decomposition of the solid solution and are characteristic of Mg–Sm alloys. 相似文献
10.
Sergii A. Sergiienko Daniela V. Lopes Gabriel Constantinescu Marta C. Ferro Nataliya D. Shchaerban Obid B. Tursunov Viacheslav I. Shkepu Hanna Pazniak Nataliya Yu. Tabachkova Enrique Rodríguez Castellón Jorge R. Frade Andrei V. Kovalevsky 《International Journal of Hydrogen Energy》2021,46(21):11636-11651
This work explores the possibilities for the processing of Ni- and Ti3C2Tx (T = OH, O) MXene-containing composite electrodes, by co-pressing and plastic deformation or by etching of the electrodes prepared directly by self-propagation high-temperature synthesis (SHS). Various material design approaches were also explored. In order to tune the Ti3C2 interlayer distance in Ti3C2Al MAX phase, an introduction of additional Al to form Ti3C2Alz materials with z > 1 was attempted. Self-propagation high-temperature synthesis of powder mixtures with extra Ni and Al content (e.g. Ni:Ti:Al:C = 1:2:3:1) resulted in SHS products containing Ti3C2Alz z > 1 material and Ni–Al alloys. Further etching of these products in 10M NaOH allowed the direct formation of electrodes with active surface containing Ti3C2Tx (T = OH, O) MXene- and Raney nickel-containing composites. The electrochemical studies were focused on hydrogen evolution and showed the potential for boosting the electrochemical reaction in Ni and MXene-containing composite electrodes, especially at high current densities. The guidelines for the processing of such electrodes under fluorine-free conditions are proposed and discussed. 相似文献