Influence of inertial effects on the disintegration of the structure of disperse systems of the solid-phase-liquid-medium type

The conditions of disintegration of structured formations occurring in disperse systems of the solid-dispersed-phase-liquid-dispersion-medium type, increasing their effective viscosity and inhibiting the attainment of a high fluidity by the dispersions, have been investigated. The role of inertial effects in attainment of the isotropic dynamic state by S/L disperse systems, when external vibration action is applied to them, has been studied. It has been shown in what manner the presence of particles of different mass (and consequently inertia) in the system leads to a disintegration of the structure under the action of dispersion-medium oscillations. __________ Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 5, pp. 164–169, September–October, 2005.     

Effect of Cu-doping on the electronic structure and optical properties of LaNi5

Optical properties of intermetallic isostructural compounds LaNi_5−xCu_x (x = 0, 0.6, 1, 1.2) have been studied in the spectral range from 0.22 to 15 μm using the ellipsometry method. It was found that the substitution of copper for nickel leads to local changes in the optical conductivity spectra. Theoretical calculations of the electronic structure and interband optical conductivity of LaNi_5−xCu_x compounds with x = 0, 1, 2, 3 were performed in the generalized gradient approximation within the pseudopotential plane-wave method PWSCF. Both the optical spectroscopic measurements and theoretical calculations demonstrate the presence of a broad absorption band around 4 eV associated with the Cu 3d → Ni 3d electron transitions and increasing with the growth of copper content.     

Optical properties of CeNi5 and CeNi4M (M = Al, Cu) compounds

The experimental study of the optical properties of CeNi₅, CeNi₄Cu and CeNi₄Al compounds was carried out in the 0.083-5.64 eV energy range using the ellipsometry method. The optical constants, dielectric functions and electronic parameters (plasma and relaxation frequencies) were determined. The energy dependencies of the optical interband conductivities are discussed by using the available information on the electronic band structure of these compounds. In the ternary alloys the optical spectra show the presence of peculiarities related to effect of Cu or Al substitution at Ni sites.     

Spectrophotometric Method of Diagnosing Liquid‐Fuel Rocket Engines

A method and equipment for optical diagnostics of liquidfuel; rocket engines (LR) is described. Experimental data on minimum detactable concentrations of such metals as Fe, Al, Mn, and Ni in the plume have been obtained. The radiation spectra of the plume of the engines of stages II and III of the Proton carrier rocket (CR) and of the fullscale oxygenkerosene LR have been measured.     

Thermoelastic properties of micron-size actuators based on the Ti<Subscript>2</Subscript>NiCu//Pt composite with shape-memory effect

Thermomechanical properties of microactuators with shape-memory effect (SME) based on the Ti₂NiCu/Pt layered composite are analyzed. Atomic-force microscopy is used to experimentally determine rigidity of the composite microactuators that represent cantilevers with sizes of 50 × 2 × 1 μm and a thickness of the SME active alloy layer of 0.5 μm in a temperature interval of 20–100°C. Forces that are exerted by the composite actuator on a microscopic object are quantitatively estimated. The experimental data are in reasonable agreement with the calculated results.     

Neutron-physical research of the maximum projected accident of an RBMK-1000 reactor

I. V. Kurchatov Institute of Atomic Energy.