Patent application number | Description | Published |
20090041609 | High-strength discontinuously-reinforced titanium matrix composites and method for manufacturing the same - The invention relates to manufacturing the flat or shaped titanium matrix composite articles having improved mechanical properties such as lightweight plates, sheets for aircraft and automotive applications, heat-sinking lightweight electronic substrates, armor plates, etc. High-strength discontinuously-reinforced titanium metal matrix composite (TMMC) comprises (a) titanium matrix or titanium alloy as a major component, (b) ceramic and/or ≦50 vol. % intermetallic hard particles dispersed in matrix, (c) complex carbide- and/or boride particles at least partially soluble in matrix at sintering or forging temperatures such as ≦50 vol. % AlV | 02-12-2009 |
20090252638 | Cost-effective titanium alloy powder compositions and method for manufacturing flat or shaped articles from these powders - The invention relates to the cost-effective manufacture of near-net shape titanium articles from sintered powders containing titanium and all required alloying elements. The cost-effective initial powder composition for subsequent room temperature consolidation and sintering contains: (a) 10-50 wt. % of underseparated titanium powder with ≦500 μm in particle size manufactured from underseparated titanium sponge comprising up to 2 wt. % of chlorine and up to 2 wt. % of magnesium. The underseparated titanium powder costs significantly less than that for fully separated powder of completely reduced sponge; (b) 10-90 wt. % of hydrogenated titanium powder, whereby this powder is a mixture of two hydrogenated powders A and B containing different amount of hydrogen: powder A contains amount of hydrogen in the range of 0.2-1 wt. % and powder B contains amount of hydrogen in the range of 2-3.9 wt. %. The powder with high hydrogen content provides purification of underseparated titanium powder during heat treatment and sintering, while the powder with low hydrogen content provides sufficient strength of green compacts as well as perfect structure and quality of the final sintered article; (c) 0-90 wt. % of standard grade refined titanium powder, and/or 5-50 wt. % of alloying metal powders: master alloys or elemental powders. The method includes (a) mixing said underseparated titanium powder, the C.P. titanium powder, the hydrogenated titanium powders containing different amount of hydrogen, (b) compacting the obtained blend by room temperature consolidation such as die pressing, molding, direct powder rolling, cold isostatic pressing, and/or metal injection molding to density at least 60% of the theoretical density, (c) additional crushing titanium hydride powders into fine fragments during consolidation at the pressure of 400-960 MPa to provide forming a uniform network of fine pores promoting healing effects during sintering, chemical cleaning and refining titanium powders in the compacted articles by heating to 300-900° C. and holding for at least 30 minutes to provide a reaction of Cl, Mg, and oxygen, with hydrogen emitted due to decomposition of titanium hydride, (e) heating in vacuum for sintering in β-phase zone of titanium in the temperature range of 1000-1350° C. and holding for at least 30 minutes, and cooling. The new technology allows the purity and mechanical properties of sintered titanium alloys and the manufacture of near-net shape sintered titanium articles to be controlled by a cost-effective process. | 10-08-2009 |
20100074788 | Fully-dense discontinuosly-reinforced titanium matrix composites and method for manufacturing the same - 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, etc. The method for manufacturing TMCC is comprised of the following steps: (a) preparing a basic powdered blend containing matrix alloy or titanium powders, dispersing ceramic and/or intermetallic powders, and powders of said complex carbide- and/or silicide particles, (b) preparing the Al—V master alloy containing ≦5 wt. % of iron, (c) preparing the Al—V—Fe master alloy fine powder having a particle size of ≦20 μm, (d) mixing the basic powdered blend with the master alloy powder to obtain a chemical composition of TMCC, (e) compacting the powder mixture at room temperature, (f) sintering at the temperature which provides at least partial dissolution of dispersed powders, (g) forging at 1500-2300° F., and (h) cooling. The resulting TMCC has density over 98% and closed discontinuous porosity after sintering that allows making hot deformation in air without encapsulating. | 03-25-2010 |
20100166643 | Semi-continuous magnesium-hydrogen reduction process for manufacturing of hydrogenated, purified titanium powder - 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° 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 MgCl | 07-01-2010 |
20130315773 | Method of Manufacturing Pure Titanium Hydride Powder and Alloyed Titanium Hydride Powders By Combined Hydrogen-Magnesium Reduction of Metal Halides - 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 hydrometallurgical treatment of the produced powders. | 11-28-2013 |
20140209533 | MULTILAYER, MICRO- AND NANOPOROUS MEMBRANES WITH CONTROLLED PORE SIZES FOR WATER SEPARATION AND METHOD OF MANUFACTURING THEREOF - 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 <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. | 07-31-2014 |