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Zh.?V.?EremeevaEmail author V.?S.?Panov L.?V.?Myakisheva A.?N.?Lizunov A.?A.?Nepapushev D.?A.?Sidorenko A.?V.?Pavlik E.?V.?Apostolova 《Russian Journal of Non-Ferrous Metals》2018,59(3):304-310
The structure and main physicochemical properties of dysprosium titanate powders prepared by mechanochemical synthesis from the low-temperature modification of titanium oxide and modification of dysprosium oxide are investigated applying X-ray phase analysis (XPA), scanning electron microscopy, Raman spectroscopy (Raman spectra), transmission electron microscopy, and chemical analysis. It is established based on XPA that the initial oxides completely transform into X-ray amorphous dysprosium titanate (Dy2TiO5) during the mechanochemical treatment of a mixture for 30–60 min. A microelectron diffraction pattern of Dy2TiO5 powders prepared by mechanosynthesis has a ring structure characteristic of the X-ray amorphous phase with a certain amount of inclusions of a crystalline phase. The dysprosium titanate powder fabricated by induction melting possesses the regular cubic crystalline lattice with a parameter of 3.4 Å. 相似文献
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A. V. Khoroshilov S. A. Cherednichenko A. V. Lizunov S. N. Fedorova 《Theoretical Foundations of Chemical Engineering》2010,44(4):569-573
Silicon tetrafluoride SiF4 reacted with aliphatic alcohols ROH to form liquid complex compounds SiF4 · 2ROH. The gas-liquid SiF4(g) -SiF4 · 2ROH(l) systems can be used for separating silicon isotopes. The hydrodynamics and mass transfer of the separation of silicon isotopes in a countercurrent column were studied using SiF4-SiF4 · 2ROH systems based on butanol-1, pentanol-1, and hexanol-1 at 293 K. Corrections were applied to the empirical coefficients in the equations of the dependence of the total holdup of a helical prismatic packing (HPP) and its specific pressure drop on a load in an isotope exchange column. The height equivalent to the theoretical plate (HETP) increased more than twofold in the butanol-1-hexanol-1 homologous series (the flow rate in the column was (3.4 ± 0.2) mmol SiF4/(cm2 min) for the working gas). It was shown using pentanol-1 as a complex-forming agent that the limiting stage of mass transfer during the separation of silicon isotopes was the isotope exchange between SiF4 and the SiF4 · 2ROH complex. 相似文献
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Lizunov AA Den Hartog DJ Donin AS Ivanov AA Prikhodko VV 《The Review of scientific instruments》2011,82(8):086105
An upgraded spectral motional Stark effect diagnostic has been installed on the gas-dynamic trap (GDT) experiment to enable spatially resolved measurement of |B|. A new low-noise charge-coupled device detector, combined with enhancements of the diagnostic neutral beam, allows single-shot profile measurements. Previously only single-point motional Stark effect measurements were possible, and detector noise severely limited measurement precision, requiring multi-shot averaging. The plasma pressure profile in GDT is derived from the measured diamagnetic modification of |B| and used to examine the conditions of stable plasma confinement at high plasma pressure. 相似文献
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Lizunov V. I. Eremenko V. I. Maksimova O. V. Shkatov V. V. 《Metal Science and Heat Treatment》1976,18(11):968-971
1. | The structure and properties of steel with a ferrite-pearlite structure depend on the arrangement of carbide platelets in the ferrite matrix. With an oriented arrangement of cementite platelets the strength increases by 15–20 kg/mm2. The first term in Eq. (2) has the same value — [`(s)] C vC q ~ 12 kg/mm2\bar \sigma _C v_C \theta \sim 12 kg/mm^2 — which is 15% of the ultimate strength of the steel with oriented cementite particles. |
2. | The strength of the composite before and after cold deformation is determined by the strength, size, quantity, and orientation of carbide platelets, the distance between platelets, the amount of free ferrite and the size of its subgrains, and the fine structure of ferrite in pearlite. |