Adma Products, Inc.

Other

Advance Material Products, Inc

Advance Materials Products, Inc.

Volodymyr A Duz

Vladimir S Moxson

Andrey G Klevtsov

Mykhailo Matviychuk

Dmitro G Savvakin

Orest M Ivasishin

Viktor D Sukhoplyuyev

Alexander E Shapiro

Alexander Nikishin

Mihajlo D Sopka

Jury Shuvalov

Sergey A Kasparov

Yury V Shuvalov

Aleksandr I Cheprasov

Vladislav V Telin

The present invention relates to design and manufacture of multilayer sintered membranes made from metals and inorganic compounds (ceramics, silicate, clay, zeolites, phosphates, etc.). The membranes are designated for separation of water. They comprise at least one layer having nanopores commensurable with the size of water molecules. The membranes comprise: (a) supporting metallic layer having pore size 1-500 microns, (b) metallic interlayer having pore size &#x3c;2 micron, (c) sublayer with local regular protrusions of the interlayer into the supporting layer to increase service life of the membrane, and (d) one nanoporous ceramic or metallic top layer having pore size in the range of 1-15 angstroms. The invented design and method allow the manufacture of cost-effective multilayer membranes containing nanoporous layer with controlled pore sizes in each layer and optimal morphology of pores that provides selective transport of molecules during filtration and separation of liquids.

Multilayer, micro- and nanoporous membranes with controlled pore sizes for water separation and method of manufacturing thereof

The invention relates to energy-saving manufacturing of purified hydrogenated titanium powders or alloying titanium hydride powders, by metallo-thermic reduction of titanium chlorides, including their hydrogenation, vacuum separation of titanium hydride sponge block from magnesium and magnesium chlorides, followed by crushing, grinding, and sintering of said block without need for any hydro-metallurgical treatment of the produced powders. Methods disclosed contain embodiments of processes for manufacturing high purity high-purity powders and their use in manufacturing near-net shape titanium and titanium-alloy articles by sintering titanium hydride and alloyed titanium hydride powders produced from combined hydrogen-magnesium reduction of titanium chlorides, halides and hydrides of other metals. Additional titanium hydride powder introduced with titanium tetrachloride beneficially affects the kinetics of magnesium-thermic reduction due to formation of additionally-emitted atomic hydrogen, which helps to reduce presence of oxides, and so cleans inter-particle interfaces of the product and enhances diffusion between all components of the powder mixture.

Method of manufacturing pure titanium hydride powder and alloyed titanium hydride powders by combined hydrogen-magnesium reduction of metal halides

The invention is suitable for the manufacture of flat or shaped titanium matrix composite articles having improved mechanical properties such as lightweight plates and sheets for aircraft and automotive applications, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and doors, as well as for sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. A fully-dense discontinuously-reinforced titanium matrix composite (TMMC) material comprises (a) a matrix of titanium or titanium alloy as a major component, (b) ceramic and/or intermetallic hard particles dispersed in the matrix in the amount of &#x2266;50 vol. %, and (c) complex carbide- and/or silicide particles at least partially soluble in the matrix at the sintering or forging temperatures such as TiCrC, TiSiC, CrC, TiAlC, TiAlC, AlC, AlSiC, AlSiC, AlSiC, VC, (Ti,V)C, VCrC, and VCrCdispersed in the matrix in the amount of &#x2266;20 vol. %. The invention can be used to produce near-full density near-net shape parts from titanium matrix composite materials with acceptable mechanical properties without a hot deformation.

Fully-dense discontinuously-reinforced titanium matrix composites and method for manufacturing the same

The invention relates to the manufacture of titanium hydride powder using continuous or semi-continuous process, and using titanium slag or synthetic rutile as raw materials, while hydrogen, titanium tetrachloride, titanium trichloride, titanium dichloride, and hydrogen chloride are participate as intermediate reaction products. The continuous comprises: (a) reduction of TiClto low titanium chlorides followed by cooling a mixture, (b) separating of residual TiClfrom solid low chlorides by heating the mixture in argon or vacuum up to 150&#xb0; C. followed by removing the titanium tetrachloride from the mixture, (c) dissociation of TiClto TiClat 450&#xb0; C. in vacuum followed by removal of gaseous titanium tetrachloride from the reaction zone, condensation to the liquid, and returning back into the reaction retort, (d) dissociation of TiClin vacuum at 750-850&#xb0; C. to manufacture fine powder of metallic titanium and titanium tetrachloride, whereby hydrogen heated up to 1000&#xb0; C. is used to accelerate this reaction, and (e) saturation of the fine titanium powder by hydrogen at 400-640&#xb0; C. to manufacture final product of titanium hydride powder which is free of oxygen or nitrogen. The semi-continuous process includes the Kroll's process as the very first step.

Continuous and semi-continuous process of manufacturing titanium hydride using titanium chlorides of different valency

The cost-effective hydrogenated, purified titanium powder is manufactured by the semi-continuous process including: (a) magnesium-thermic reduction of titanium chlorides at 830-880&#xb0; C. in the hydrogen atmosphere characterized by the formation of a hollow porous block of the reaction mass having an open cavity in the center of the block, (b) full thermal-vacuum separation of the hollow block from excessive Mg and MgClat 850-980&#xb0; C. and residual pressure of 26-266 Pa using a multi-step cycle including: (i) purging hydrogen at 800-950&#xb0; C. into the reactor at the pressure 10 kPa to 24.5 kPa, (ii) directive squeezing-out of a separated liquid phase containing magnesium and magnesium chloride into an additional vessel, and (iii) application of alternate pressure to small portions of the liquid phase in porous titanium compound from different sides which provides removal of the liquid from small pores of the titanium compound and fast evaporation of said liquid, (c) simultaneous hydrogenation and cooling of the titanium sponge down to 600&#xb0; C. by purging cold hydrogen using multiple recirculation of hydrogen, (d) holding the hydrogenated porous titanium compound in the hydrogen atmosphere at 450-600&#xb0; C. for 20-70 minutes, (e) removing the hydrogenated porous titanium compound from the reactor, and (f) crushing and grinding the crushed hydrogenated porous titanium pieces into the powder having a predetermined particle size.

Semi-continuous magnesium-hydrogen reduction process for manufacturing of hydrogenated, purified titanium powder

The invention relates to manufacture of titanium articles from sintered powders. The cost-effective initial powder: 10-50 wt % of titanium powder having &#x2266;500 microns in particle size manufactured from underseparated titanium sponge comprising &#x2266;2 wt % of chlorine and &#x2266;2 wt % of magnesium; 10-90 wt % of a mixture of two hydrogenated powders A and B containing different amount of hydrogen; 0-90 wt % of standard grade refined titanium powder, and/or 5-50 wt % of alloying metal powders. The method includes: mixing powders, compacting the blend to density at least 60% of the theoretical density, crushing titanium hydride powders into fine fragments at pressure of 400-960 MPa, chemical cleaning and refining titanium powders by heating to 300-900&#xb0; C. and holding for &#x2266;30 minutes, heating in vacuum at 1000-1350&#xb0; C., holding for &#x2266;30 minutes, and cooling.

Cost-effective titanium alloy powder compositions and method for manufacturing flat or shaped articles from these powders

The invention relates to manufacturing of fully dense strips, plates, sheets, and foils from titanium alloys, titanium metal matrix composites, titanium aluminides, and flat multilayer composites of said materials by direct powder rolling of blended powders followed by sintering. The resulting titanium alloy flat products have properties that meet or exceed the conventional ingot metallurgy alloys and are suitable for aerospace, automotive, sporting goods, and other applications. The process includes: (a) providing C.P. titanium matrix powder and at least one powder of alloying components, (b) mechanical activation by attrition of all alloying components, (c) blending titanium powder with attrited alloying powders obtained in step (b), (d) cold direct powder rolling in a mill with horizontally-positioned rolls with different diameters to achieve density of the rolled strip of 60&#xb1;20% of the theoretical value with subsequent densification by re-rolling green strip, (e) densification by cold re-rolling of the green strip, (f) multiple cold re-rolling, and (g) sintering.

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Hudson, OH, United States of America

Volodymyr A Duz