Method for producing blank of ti49,3ni50,7 nanostructured alloy with shape memory effect
SUBSTANCE: method for producing a blank of Ti49, 3Ni50, 7 nanostructured alloy with shape memory effect includes uniform angular pressing with accumulated degree of deformation more than 4 in the temperature range 300-550°C, plastic deformation and annealing. The blank produced after ECAP is enclosed in steel shell, and plastic deformation is carried out by free upsetting to degree of not less than 30% in temperature range of 20-300°C, then the blank is removed from the shell, and annealing is carried out at temperature T = 200-400°C.
EFFECT: enhanced mechanical properties and functional characteristics with the necessary cross-section of blanks.
1 tbl, 2 ex
SUBSTANCE: method of heat treatment of item out of wrought alloy "BT23" means, that item is heated to 850°C, held for 1 h, cooled in water and subjected to ageing at temperature 550°C for 10 h. Then item is heated, held at 300-400°C and further cooled to 20 h (-10) °C at simultaneous action of gas flow and acoustic field of sound frequency range with sound pressure 140-160 dB. Grains of proeutectoid constituent of α-solid solution are milled, as all structural components, the intragranular structure is formed with dislocations forming in form of regular formation and with decreasing of the internal microstresses at phase boundary.
EFFECT: increased strength upon satisfactory plasticity, and increased relaxational endurance of alloys.
1 dwg, 2 tbl
FIELD: metallurgy industry.
SUBSTANCE: method of heat treatment of products made of a titanium alloy VT16 comprises hardening by heating to the temperature of 790-830°C, exposure and cooling in water. After hardening the product is heated to the temperature of (0.5-0.6)tcm, where tcm is the aging temperature of the alloy, °C, cooling is carried out to a temperature of -10°C with simultaneous exposure of the gas flow and acoustic field with the sound pressure level of 140-160 dB and subsequent aging is carried out at a temperature of 560°C for 3 hours with air cooling.
EFFECT: reduction of the titanium alloy VT16 aging time in the aging process, while maintaining the high level of strength and plasticity.
FIELD: metallurgy industry.
SUBSTANCE: method of manufacturing products of a soft magnetic alloy based on iron-cobalt equal channel angular pressing comprises sandblasting of the surface of preforms, etching in a mixture of sulphuric acid, hydrofluoric acid and nitric acid at a ratio in g/l: 550-750, 250-300, 250-300, activation of the preform surface in the hydrochloric acid solution with the concentration of at least 200 g/l, formation on the surface of the preform of a galvanic intermediate layer of nickel with the thickness of 3-5 microns, formation of the galvanic plastic layer of copper with the thickness of 80-100 microns and equal channel angular pressing of the preforms at a pressure of 1000 MPa in the temperature range of 450-500°C.
EFFECT: significant reduction in the electric potential of the surface of samples, which reduces their oxidation and enables to increase the number of passages during pressing.
1 dwg, 1 tbl, 2 ex
SUBSTANCE: method involves hot forging of ingot, machining of surface, hot rolling, cold rolling at several stages with intermediate and final nonoxidation heat treatments. Hot forging is performed by heating to 1000-1200°C and total drawing of not more than 2.2 at each stage. Hot rolling is performed by heating to 900-1000°C with total drawing to 18 and single crimping of not more than 30%. Cold rolling is performed at several stages with deformation at each stage of 20-50% with intermediate and final nonoxidation heat treatments at 700-800°C.
EFFECT: improving mechanical properties of hafnium and quality of hafnium profile surface.
3 cl, 1 tbl, 1 ex
FIELD: processes for treating metallic belts and producing magnetic-mechanical markers for electronic inspection of articles.
SUBSTANCE: method comprises steps of annealing thin belt of metallic ferromagnetic alloy at continuously transporting it through furnace for imparting to it predetermined magnetic characteristics and for eliminating lengthwise curvature of belt caused by manufacturing process. At process of heat treatment belt is guided along practically straight duct of clamping attachment of annealing furnace. Said duct is characterized by weakly bent portions along its length, namely in zone of belt introducing in annealing furnace. Slightly bent duct provides improved heat contact between belt and heat accumulator.
EFFECT: possibility for performing process with very high annealing rates without deterioration of belt characteristics.
39 cl, 1 ex, 2 tbl, 12 dwg
FIELD: measurement equipment.
SUBSTANCE: method for determining a range of sizes of suspended nanoparticles consists in passage of gas (mixture of gases) containing analysed particles, through diffusion batteries of a meshed type and their introduction to supersaturated vapours of a low-volatile enlarging substance. Then, lighting of a flux of particles with a light beam and recording of parameters of light signals shaped by enlarged particles at their flying through the pointed-out area of the flux is performed. In order to improve accuracy of determination of the range of sizes, the main flux is separated into six parallel fluxes. With that, five of them are passed through five diffusion batteries with a different slip, and one of them is passed directly. Then, these fluxes pass through six devices of condensation growth and then to a field of vision of a charge-coupled device matrix and the obtained six areas of images of enlarged fluxes of particles are transmitted to a computer for an analysis of their range of sizes. Unlike known ones, the method allows performing simultaneous processing by means of a computer of six images of enlarged particles, which characterise different dimensional ranges of nanoparticles.
EFFECT: reducing the time required for measurements and improving their accuracy.
SUBSTANCE: semiconductor structure for photo converting and light emitting devices consists of semiconductor substrate (1) with face surface misaligned from plane (100) through (0.5-10) degrees and at least one p-n junction (2) including at least one active semiconductor ply (3) arranged between two barrier plies (4) with inhibited zone width Eg0. Active semiconductor ply (3) consists of 1st and 2nd type spatial areas (5, 6) abutting of barrier plies (3) and alternating in the plane of active semiconductor ply (3). 1st type spatial areas (5) feature inhibited zone width Eg1 < Eg0, while 2nd type areas have inhibited zone width Eg2 < Eg1.
EFFECT: higher efficiency owing to increased photo flux and higher level of photo generation and charge carrier separation, higher probability of photon generation and lower probability of radiation-free recombination.
11 cl, 11 dwg, 5 ex
SUBSTANCE: first step includes obtaining low-hydroxylated insoluble fullerenols by reacting concentrated fullerene solution in o-xylene with aqueous ammonia solution in the presence of a tetrabutylammonium hydroxide phase-transfer catalyst at 35-40°C. At the second step, the obtained low-hydroxylated insoluble fullerenols are hydroxylated to transform them into a water-soluble form by mixing with 6-15% aqueous hydrogen peroxide solution and heating for 4-5 hours at 65°C. Water-soluble fullerenols are then precipitated from an alcohol-containing solution.
EFFECT: simplifying the method while preserving quality characteristics and full extraction of the end product.
2 cl, 1 dwg, 4 tbl, 3 ex
FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to pharmaceutical industry, namely to selenium nanocomposites of natural hepatotrophic galactose-containing polysaccharide matrixes, representing water-soluble orange-red powders containing zerovalent selenium (Se0) nanoparticles sized 1-100 nm in the quantitative content of 0.5 - 60 wt %, possessing antioxidant activity for treating and preventing redox-related pathologies, particularly for treating toxic liver damage, to a method for producing and to an antioxidant agent containing the above nanocomposites.
EFFECT: invention provides the targeted agent delivery to liver cells, as well as higher agent accessibility and lower toxic action of selenium.
7 cl, 11 ex, 4 tbl
SUBSTANCE: method includes forming a near-field mask on the surface of a dielectric substrate and irradiating the obtained structure with a femtosecond laser pulse. The laser radiation is first passed through a nonlinear optical crystal with a coefficient of transformation into a second harmonic equal to 5-7%. The dielectric substrate coated with the near-field mask is irradiated with the obtained bichromatic femtosecond pulse with energy density in the range of 25-40 mJ/cm2, which is less than the laser radiation energy density normally used in similar nanopatterning.
EFFECT: high resolution and low laser radiation energy consumption.
SUBSTANCE: invention relates to a method for hydroconversion of heavy oil fractions - feed stock, the method including a zero step and subsequent N steps. The zero step includes feeding, into a reactor, material, a catalyst precursor - aqueous solution of a Mo (VI) salt or salts of Mo and Ni, and hydrogen at pressure of 4-9 MPa under normal conditions; reacting the material and hydrogen at 420-450°C in the presence of a precursor of a suspended nanosize molybdenum or molybdenum-nickel catalyst formed in the reactor; atmospheric or atmospheric-vacuum distillation of the hydrogenation product; removing the low-boiling fraction with a boiling point not higher than 500°C as a product and returning the high-boiling fraction or part thereof into the reactor. The next steps include feeding, into the reactor, material, a catalyst precursor, the returned part of the high-boiling fraction and hydrogen; reaction thereof; said atmospheric distillation of the hydrogenation product; removing the low-boiling fraction as a product; returning part of the high-boiling fraction into the reactor; burning at 1000-1300°C or gasification of the remaining part of the high-boiling fraction, after which trapped ash-slag residues are subjected to further oxidising burning at 800-900°C and the obtained ash product, which is carbon-free, is used to regenerate the catalyst precursor and produce an industrial concentrate of vanadium and nickel. The number of steps N is determined using formulae:
EFFECT: high output of low-boiling fractions, low molybdenum consumption, high degree of extraction of molybdenum, vanadium and nickel from the solution, enabling calculation of the required reactor volume, obtaining an industrial concentrate of vanadium and nickel, low hydrogen consumption.
3 cl, 1 dwg, 2 tbl, 2 ex
SUBSTANCE: invention can be used in obtaining coatings, reducing coefficient of secondary electronic emission, growing diamond films and glasses, elements, absorbing solar radiation. Colloidal solution of nano-sized carbon is obtained by supply of organic liquid - ethanol, into chamber with electrodes, injection of inert gas into inter-electrode space, formation of high-temperature plasma channel in gas bubbles, containing vapours of organic liquid. High-temperature plasma channel has the following parameters: temperature of heavy particles 4000-5000K, temperature of electrons 1.0-1.5 eV, concentration of charged particles (2-3)·1017 cm3, diameter of plasma channel hundreds of microns. After that, fast cooling within several microseconds is performed.
EFFECT: simplicity, possibility to obtain nanoparticles of different types.
3 cl, 1 dwg
SUBSTANCE: invention relates to field of nanotechnologies and can be used for obtaining composite materials with high electric and heat conductivity, additives to concretes and ceramics, sorbents, catalysts. Carbon-containing material is evaporated in volume thermal plasma and condensed on target surface 9 and internal surface of collector 7. Plasma generator 3, which includes coaxially located electrodes: rod cathode 4 and nozzle-shaped output anode 5, are used. Gaseous carbon-containing material 6 is supplied with plasma-forming gas through vortex chamber with channels 2 and selected from the group, consisting of methane, propane, and butane. Bottom of collector is made with hole 8 for gas flow to pass.
EFFECT: invention makes it possible to reduce energy consumption of the process, extend types of applied hydrocarbon raw material, simplify device construction and provide continuity of the process and its high productivity.
2 dwg, 3 ex
SUBSTANCE: method of obtaining a composite material includes the influence on a mixture of a carbon-containing material, filler and sulphur-containing compound by a pressure of 0.1-20 GPa and a temperature of 600-2000°C. As the sulphur-containing compound applied is carbon bisulphide, a compound from the mercaptan group or a product of its interaction with elementary sulphur. As the carbon-containing material applied is molecular fullerene C60 or fullerene-containing soot. As the filler applied are carbon fibres, or diamond, or nitrides, or carbides, or borides, or oxides in the quantity from 1 to 99 wt % of the weight of the carbon-containing material.
EFFECT: obtained composite material can be applied for manufacturing products with the characteristic size of 1-100 cm and is characterised by high strength, low density, solidity not less than 10 GPa and high heat resistance in the air.
11 cl, 3 dwg, 11 ex
SUBSTANCE: invention relates to inorganic chemistry, namely to obtaining silicon-carbide materials and products, and can be applied as thermal-protective, chemically and erosion resistant materials, used in creation of aviation and rocket technology, carriers with developed surface of heterogeneous catalysis catalysts, materials of chemical sensorics, filters for filtering flows of incandescent gases and melts, as well as in nuclear power industry technologies. To obtain nanostructures SiC ceramics solution of phenolformaldehyde resin with weight content of carbon from 5 to 40% with tetraethoxysilane with concentration from 1·10-3 to 2 mol/l and acidic catalyst of tetraethoxysilane hydrolysis id prepared in organic solvent; hydrolysis of tetraethoxysilane is carried out at temperature 0÷95°C with hydrolysing solutions, containing water and/or organic solvent, with formation of gel. Obtained gel is dried at temperature 0÷250°C and pressure 1·10-4÷1 atm until mass change stops, after which carbonisation is realised at temperature from 400 to 1000°C for 0.5÷12 hours in inert atmosphere or under reduced pressure with formation of highly-disperse initial mixture SiO2-C, from which ceramics is moulded by spark plasma sintering at temperature from 1300 to 2200°C and pressure 3.5÷6 kN for from 3 to 120 min under conditions of dynamic vacuum or in inert medium. Excessive carbon is burned in air at temperature 350÷800°C.
EFFECT: obtaining nanostructured silicon-carbide porous ceramics without accessory phases.
4 cl, 4 dwg, 3 ex
SUBSTANCE: stock is exposed to closed deposition in a matrix channel and double-sided extrusion. Extrusion is carried out into upper and lower wedge cavities formed by upper and lower wedge puncheons. Then the specified puncheons are extracted from the matrix channel and turned around the axis by the angle 180°. By means of these puncheons they perform the subsequent loading of the stock with filling of the upper and lower wedge cavities at the other side. The cycle is repeated, afterwards wedge puncheons are replaced to puncheons with an end surface arranged perpendicularly to the axis of the stock. Closed deposition is carried out giving initial shape to the stock. Wedge puncheons and matrix channel have round or rectangular shape.
EFFECT: invention excludes formation of cracks, cavities, folds and clamps in a stock and provides for higher resistance and operability of a device.
3 cl, 7 dwg