Effect of cold deformation on age hardening of alloy VT35

The effect of cold deformation on the variation of hardness during aging of sheets from alloy VT35 with β-structure is studied. Diagrams of isothermal transformations due to aging of alloy VT35 with β-phase are plotted for sheets without work hardening and for sheets with an initial β-structure subjected to cold rolling.     

Oil shales of Mongolia

The results of studies of organic matter of Mongolian oil shales are presented. The total amount of bitumens in the shales is less than 2 wt %, whereas the kerogen content is about 15 wt %. A high H/C value (1.5–2.3) and the prevalence of aliphatic over aromatic structures in the insoluble organic matter indicate the usefulness of these oil shales as both power generation fuel and raw material for processing into chemicals.     

Mathematical Simulation of Volume and Gasless Wave Combustion in a Hybrid Mixture of Activated and Inactivated Powders

Combustion, Explosion, and Shock Waves - Mathematical models constructed in the macroscopic approximation are used to perform a theoretical study of volume and wave synthesis in a hybrid mixture...     

Detonation combustion of gas mixtures using a hypervelocity projectile

This paper considers, from a unified point of view, problems of initiation of detonation combustion of a gaseous mixture using a hypervelocity projectile (HVP), The consideration is based on the energy criterion forHVP-induced detonation initiation. Experimental results are given that support the correctness of the criterion in a wide range of diameters (5–250 mm),HVP velocities (800–3500m/sec), and compositions of explosive mixtures (from active fuel-oxygen to hard-to-detonate fuel-air mixtures). The processes ofHVP interaction with an explosive mixture are classified. The previously unknown effect of jet formation of a detonation wave from a ballistic wave (at velocities less than the detonation velocities) was discovered for anHVP with a plane bow. Lavrentśev Institute of Hydrodynamics, Siberian Division, of the Russian Academy of Sciences, Novosibirsk 630090. Translated from Fizika Goreniya i Vzryva, Vol. 33, No. 5, pp. 85–102, September–October, 1997.     

Partial briquetting of coal batch: A review

Laboratory research and industrial data on the partial briquetting of coking batch by binder are analyzed. Briquetting by compacting the batch without binder is also found to be expedient.     

Adsorption of ethyl benzoate on activated carbon

The kinetics of adsorption of ethyl benzoate from solutions in ethanol on coconut shell activated carbon was studied. It was found that the kinetics of adsorption of ethyl benzoate can be described by pseudofirst-order and pseudo-second-order rate equations with the same accuracy. It was established that the adsorption isotherm at a concentration to 2 g/L in the initial solution is adequately described by the Langmuir equation.     

Adsorption and Photocatalytic Activity of the Porous Glass–ZnO–Ag Composite and ZnO–Ag Nanopowder

Glass Physics and Chemistry - This article presents the results of a study of the effect on the adsorption properties of microporous glass of its modification with ZnO–Ag nanocrystals. The...     

Effect of flameout on Combustion of small particles in an acoustically oscillating flow

Combustion of magnesium and titanium particles in an acoustically oscillating flow is experimentally studied for the case where the particle dimensions are smaller than the amplitude of gas displacement in an acoustic wave. An increase in the combustion time of magnesium particles and a decrease in the combustion time of titanium particles upon application of acoustic vibrations is found. Characteristic features of fluctuations of the intensity of the luminous flux of a burning magnesium particle as a response to vapor-phase burning of a metal drop to an external acoustic action are revealed. An explanation of the shape of registered fluctuations is offered on the basis of an assumption about flame-front blowoff from the frontal point of the drop. Conditions necessary for flameout in an oscillating flow and effects that can be induced by flameout from the drop in the case of burning of sprayed fuels in intermittent burning devices are discussed. Translated fromFizika Goreniya i Vzryva, Vol. 36, No. 2, pp. 10–16, March–April, 2000.