429 results about "Titanium hydride" patented technology

The invention relates to a method for manufacturing a foamed aluminum sandwich plate, which belongs to the field of porous foam metal and laminar composite materials. The method comprises the following steps of: uniformly mixing aluminum-silicon alloy powder prepared by an atomization method, and foaming agent titanium hydride powder and metal magnesium powder in a certain ratio; filling the powder into a thin-wall steel (or aluminum alloy) tube with one sealed end; sealing the other end of the tube after powder filling and preparing a rolled blank; rolling and compounding at a slow speed on a cold rolling mill; trimming an obtained composite plate and cutting a foamed preformed blank according to the size of a foaming mold; foaming the preformed blank in a steel mold in a limited way; adjusting foaming temperature and foaming time as required; and foaming at a high temperature for a short period of time to obtain a high-quality foamed aluminum sandwich plate with a uniform foam structure in a core layer, good interface bonding, high thickness accuracy and excellent plate profile. The method has the outstanding characteristics of low equipment requirement, high plate profile accuracy of a product, high three-point bending strength and the like and is advantaged technology suitable for mass industrial production of foamed aluminum sandwich structural materials.

This method for producing an aluminum composite including porous sintered aluminum, includes: mixing aluminum powder with a sintering aid powder containing either one or both of titanium and titanium hydride to obtain a raw aluminum mixed powder; adding and mixing a water-soluble resin binder, water, a plasticizer containing at least one selected from polyhydric alcohols, ethers, and esters, and a water-insoluble hydrocarbon-based organic solvent containing five to eight carbon atoms into the raw aluminum mixed powder to obtain a viscous composition; shape-forming the viscous composition on an aluminum foil or an aluminum plate and causing the viscous composition to foam to obtain a formed object prior to sintering; and heating the formed object prior to sintering in a non-oxidizing atmosphere to obtain an aluminum composite which includes porous sintered aluminum integrally joined onto the aluminum foil or the aluminum plate, wherein when a temperature at which the raw aluminum mixed powder starts to melt is expressed as Tm (° C.), then a temperature T (° C.) of the heating fulfills Tm-10 (° C.)≦T≦685 (° C.).

The invention discloses a method for manufacturing micro-fine spherical titanium powder, which includes the steps: using sponge titanium as raw materials, mixing the sponge titanium with hydrogen, holding the positive pressure of the hydrogen at 0.05-0.1MPa, preserving heat at the temperature of 650-730 DEG C, and cooling after ensuring the sponge titanium and the hydrogen to sufficiently react; crushing the hydrogenated sponge titanium with an air-stream mill, controlling the revolving speed of the air-stream mill within 1000r / min-1300r / min, and obtaining titanium hydride powder with a grain size smaller than 45 micrometers by means of crushing; and dehydrogenizing and balling the titanium hydride powder by using radio frequency plasma. The method for manufacturing the micro-fine spherical titanium powder has the advantages that the grain size of the powder and grain size distribution can be effectively controlled, and the powder is low in oxygen content, few in production procedure, low in cost, high in balling rate, fine in sphericility and suitable for industrialized popularization.

The invention discloses a preparation method and a device of a metal foam material. The preparation method comprises the following steps: mixing 93-99 wt% of aluminium matrix, 0.5-5 wt% of additive and 0.5-2 wt% of foaming agent uniformly to form a shaped foamable precursor material, putting the foamable precursor material in a foaming furnace with infrared heating to foam the foamable precursor material fast under infrared radiation, then taking the foam material out from the foaming furnace and cooling, wherein, the aluminium matrix is pure aluminium, aluminium powder or aluminium alloy, the foaming agent is titanium hydride, zirconium hydride, or calcium carbonate, and the additive is calcium, carborundum powder, or alumina powder. The device is a foaming furnace with infrared heating,has the advantages of fast foaming the precursor material, eliminating the hole gradient, easily controlling the foaming and cooling process, making the product have reproducibility and maneuverability, and improving cellular uniformity. According to the invention, metal foam sandwich panels can be prepared directly, and the mechanical properties of the aluminium-based foam material are improved.

The method is suitable for the manufacture of flat or shaped titanium aluminide articles and layered metal matrix composites such as lightweight plates and sheets for aircraft and automotive applications, thin cross-section vanes and blades, composite electrodes, 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. The method includes the following steps: (a) forming a porous preform of the reactive powder alloy or a porous multi-layer composite preform consisting of reactive powder metals and alloys by consolidation using at least one method selected from low-temperature loose sintering in vacuum, high-temperature loose sintering in vacuum, low-pressure sintering in an inert gas, cold pressing, direct powder rolling, isostatic or die pressing, and other means of room temperature and warm temperature consolidation, and / or combination thereof, to provide the density not less than 25% from the theoretical density of said reactive alloy; (b) hot consolidating by hot pressing said preform, hot rolling, hot isostatic pressing, or hot extrusion to obtain the density of 98-100% from the theoretical density of said reactive alloy; (c) additional sintering and / or annealing at the temperature being at least 900° C. to decrease the residual porosity, control the microstructure, and improve the mechanical properties, especially ductility and / or plasticity of the resulting metal sheets or layered composites. The hot pressing is carried out at the temperature ranging 950-1700° C., preferably at 1250-1450° C., and at pressure ranging 50-350 kg / cm<2>. The HIP is carried out at the temperature ranging 1250-1350° C. and at pressure ranging 15000-40000 psi. The layered composite preform is manufactured by individual loose sintering, one layer of the composite at a time, and assembling them in the desired order. The composite consists of layers of titanium and / or titanium hydride, Ti-6Al-4V alloy, alpha-titanium aluminide alloy, beta-titanium aluminide alloy, and gamma-titanium aluminide alloy in any combinations.

It is an object of the present invention to provide a method of manufacturing titanium hydride powder that is capable of manufacturing titanium hydride by using titanium scrap generated during machining as a raw material. Further, according to the method of manufacturing titanium hydride powder, since the titanium scrap is hydrogenated and changed into powder at the same time for a short time, it is possible to reduce the number of processes and manufacturing cost and to improve productivity. In order to achieve the object, according to an embodiment of the present invention, a method of manufacturing titanium hydride powder includes charging titanium scrap into a reaction container, removing air in the reaction container and supplying hydrogen gas to the reaction container, and performing ball milling.

The invention provides a preparation method of high-purity micro-fine low-oxygen titanium powder, which belongs to the technical field of powder preparation in the powder metallurgy process. The preparation method is characterized by combining hydrogenation and dehydrogenation with a jet milling process, firstly carrying out hydrogenation treatment on a titanium sponge to prepare titanium hydride powder, then utilizing a jet mill to break the titanium hydride, then carrying out vacuum dehydrogenation, and finally utilizing the jet mill to carry out breaking gradation and vacuum package and obtaining a titanium powder product. Compared with the traditional ball milling process, the jet milling process causes no pollution, and iron impurities caused by collision of steel balls in the ball milling process can be avoided; due to jet milling and high-vacuum dehydrogenation treatment, the content of oxygen can be controlled to be lowest, and the powder taking and packaging operations are respectively carried out in a glove box, so that the powder and the air are isolated in the whole process, and further, the prepared high-purity micro-fine low-oxygen titanium powder is prepared.

The invention provides a preparation method of an ultra-fine spherical nickel coated titanium composite powder, belonging to the manufacturing field of metallic powder material (compound). The preparation method comprises the following steps of: after pre-processing the raw material titanium hydride powder, firstly performing chemical nickel-plating; after radio-frequency plasma spheroidizing, performing dehydrogenation on the titanium hydride powder with large-particles; breaking the powder into ultra-fine spherical powder; and simultaneously reacting the nickel coated on the surface with titanium to obtain the spherical powder coated with nickel on the surface; and obtaining purified ultra-fine spherical nickel coated titanium composite powder after vacuum heat treatment. The preparation method has the characteristics of low oxygen content of power, uniform thickness of the nickel layer coated on the surface, high apparent density, good fluidity, short processing time, and the like,and the short procedure preparation of material is realized.

The invention discloses a preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing and belongs to the technical field of preparation of metal powder. The method comprises the following steps: firstly, by using a high-purity titanium block material as a raw material, performing arc evaporation under an inert gas environment, and meanwhile, charging hydrogen to synthesize titanium hydride nano powder through a gas-phase reaction; secondly, agglomerating and granulating the titanium hydride nano powder to obtain micron-sized titanium hydride powder with higher density; finally, performing heat treatment on the granulated micron-sized titanium hydride powder, and performing degumming, dehydrogenation and compacted consolidation to obtain pure-titanium powder particles of which the particle size, the sphericity and the fluidity meet a 3D printing requirement. According to the method, the sphericity and the particle size distribution of the titanium powder particles are highly controlled; the process is simple, and the cost is low; metal titanium with great activity is stabilized in a new way of generating oxidation-resistant titanium hydride nano powder particles firstly, and the content of oxygen in the titanium powder particles which are finally prepared can be controlled.

The invention relates to a preparing method for a powder metallurgy titanium alloy. The preparing method includes the following steps that TiH2 powder, Ti powder and other alloy elements serve as raw materials and are evenly mixed to be subject to compression molding, wherein the adding amount of TiH2 accounts for 3%-25% of the total mass of the raw materials; the TiH2 is heated in a high-vacuum environment to be decomposed and is sintered in a hydrogen atmosphere; then the temperature is reduced to 750 DEG C to 1000 DEG C, and vacuum pumping is conducted for hydrogen removing; and finally, the powder metallurgy titanium alloy product is obtained after cooling. According to the preparing method, the element H is added into the powder metallurgy titanium alloy in the form of titanium hydride, and the adding amount of the H is controlled by controlling the amount of the titanium hydride; and meanwhile, the organization structure of the sintered titanium alloy is adjusted by controlling the H removing temperature of the hydrogen atmosphere sintered titanium alloy, and the high-performance titanium alloy is obtained. Compared with a method without adding titanium hydride, the density of the alloy obtained in the preparing method is increased, and the tensile strength is increased.

Braze compositions containing flux compositions and processes for using such braze compositions, such as for use in the manufacturing, coating, repair, and build-up of superalloy components. The braze composition contains an aqueous binder system, multiple inorganic compounds, titanium hydride, and a metallic braze alloy. The braze composition is useful when brazing superalloys that are prone to oxidation at elevated brazing temperatures.

The invention discloses a preparing method of difficult dissolving alloy through powder metallurgical technique, which is characterized by the following: selecting titanium hydride and zirconium hydride particle of Fisher grain at 5-10um with maximum particle not more than 10um; preparing TZM modybdenum alloy; dispersing evenly in the sintering course due to little second phase grain size; improving high-temperature property and normal-temperature fragility.

The invention discloses a preparation method for a high-purity high-compactness and large-dimension molybdenum-titanium alloy sputtering target material. The preparation method comprises the following steps that (1) material mixing is conducted, molybdenum and titanium hydride are selected as powder raw materials, the two kinds of powder are mixed under the argon protection atmosphere, and alloy powder is obtained; (2) compression molding is conducted, and the mixed powder raw materials are put into a rubber jacket mold to be subjected to cold isostatic pressing treatment; (3) sintering is conducted, a compressed blank is subjected to first-stage dehydrogenation sintering and second-stage compacting sintering in a vacuum sintering furnace, and finally the sintered blank is obtained; (4) rolling is conducted; (5) annealing is conducted; and (6) machining is conducted, the target material blank after being subjected to annealing is subjected to machining, and a molybdenum-titanium alloy sputtering target material product is obtained. The molybdenum-titanium alloy sputtering target material produced through the preparation method is uniform in content, free of segregation, fine and small in grain size, high in purity, and good in compactness.

The invention belongs to the technical field of preparing and processing of titanium and a titanium alloy, and particularly relates to a method for manufacturing titanium and titanium alloy and part thereof by taking hydrogenated sponge titanium as a raw material. The method comprises the following steps: hydrogenating sponge titanium; synchronously ball-milling to prepare hydrogenated titanium powder or mixed powder; pressing the powder; quickly sintering and synchronously dehydrogenizing; thermally mechanically solidifying or forming; performing complete vacuum dehydrogenizing; and obtainingan alloy product. The method realizes synchronously ball-milling to prepare mixed powder from hydrogenated sponge titanium and alloying raw materials, and the powder does not need to screen, so thatthe powder yield is greater than 96%; and under protection of inert atmosphere, pressing, quick heating and alloying, thermal mechanical solidifying and forming are completed. The method is short in process flow, is high in efficiency, can prepare the titanium and the titanium product with high compaction (greater than or equal to 99.8%) and low oxygen content (lower than or equal to 0.26%); mainmechanical properties of the alloy are higher than level of common deformed titanium alloy; and cost is obviously lower than that of conventional powder metallurgical titanium alloy.

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.Methods disclosed contain embodiments of processes for manufacturing 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 the 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 of components of the powder mixture.

The invention, belonging to the technical field of explosive preparation, particularly relates to an emulsion explosive prepared by using hydrogen storage materials. The explosive comprises an emulsion base and a sensitizing agent, wherein, the sensitizing agent is titanium hydride, the weight of the sensitizing agent accounts for 0.6-8 % of the total weight of the titanium hydride hydrogen storage emulsion explosive, and the purity of titanium hydride is no less than 95 %. During the detonation process, partial titanium hydride reacts with water in the emulsion base to release a little hydrogen, thus a certain foaming effect on the emulsion base is achieved, and the emulsion base is allowed to detonate, so that titanium hydride plays a role as the sensitizing agent. Simultaneously, the rest titanium hydride is subject to thermal decomposition under the effect of high temperature generated by the reaction between emulsion base and hydrogen bubbles to rapidly release hydrogen, and hydrogen continues participating the detonation reaction with the emulsion base to allow the output energy to contain the energy released by the emulsion base and titanium hydride together. The titanium hydride hydrogen storage emulsion explosive disclosed herein has the characteristics of low output explosion pressure, large impulse, long decay time, and high energy.

The invention relates to a preparation method for micro-fine spherical titanium alloy powder. The preparation method comprises the following steps: (a) selecting and mixing titanium hydride or titanium and at least two alloy elements; (b) taking hydrogen or nitrogen as carrier gas and conveying a mixture into a plasma torch to be gasified and smelted to form an alloy body, wherein the flow of the carrier gas is 0.5-5m<3> / h and the feeding speed is 5-100g / min; and (c) leading the alloy body into a heat exchanging chamber with the temperature of 150-300 DEG C to form the micro-fine spherical titanium alloy powder. According to the preparation method for the micro-fine spherical titanium alloy powder provided by the invention, on the one hand, the hydrogen or the nitrogen is used as the carrier gas to convey the mixture into the plasma torch to be gasified, so that the titanium and other metal elements can form the alloy body with the uniformly-distributed elements; on the other hand, the alloy body is led into the heat exchanging chamber with the temperature of 150-300 DEG C, so that the temperature of the alloy body is rapidly reduced and the spherical powder is formed, and particle sizes are uniformly distributed; the preparation method is simple to operate and automatic control is easy to realize, so that the preparation method can be popularized and used in a large scale.

The present invention relates to a preparation method of high-purity ultrafine titaminium powder for aviation industry. Said preparation method includes the following steps: selecting and using sponge titanium or titanium remainder as raw material, drying, injecting hydrogen under the vacuum condition to obtain titanium hydride, mechanically-granulating to obtain titanium hydride powder, vacuum heating and dehydrogenating to obtain dehydrogenated titanium, finally sorting, checking and packaging so as to implement preparation of titanium powder. The impurity content and oxygen content in said prepared titanium powder are low, the particle size of said titanium powder is small and its uniformity is good, its particle size can be reached to -10 meshes to -400 meshes. Said invention titanium powder can be used as additive for manufacturing aerial aluminium alloy with high strength and good toughness.

The invention discloses a method for preparing an Al-Ti-B (aluminum-titanium-boron intermediate) intermediate alloy refiner from titanium hydride and potassium fluoborate. The preparation method comprises the following steps: weighing 1 to 10 mass percent of dried titanium hydride, 8 to 15 mass percent of potassium fluoborate powder and 75 to 90 mass percent of industrial pure aluminum blocks; placing the aluminum blocks in a crucible, heating the aluminum blocks to 730 to 950 DEG C for melting, sequentially adding the titanium hydride and the potassium fluoborate powder, uniformly stirring the mixture at speed of 100 to 600 rpm, and preserving the heat to obtain aluminum alloy melt; purifying the aluminum alloy melt, pouring and discharging the purified aluminum alloy melt out of a furnace at temperature of 700 to 950 DEG C, and performing water cooling to obtain an Al-Ti-B intermediate alloy. The preparation method has the advantages that a production process is simple, the raw materials are extensive, a small amount of harmful fluoride is emitted, and the microstructure of the prepared Al-Ti-B intermediate alloy contains ideal TiAl3 and TiB2 second-phase particles.

A powder metallurgy method of making a chromium base alloy includes blending a first powder comprising a chromium powder and a second powder comprising at least one of titanium, titanium hydride, zirconium or zirconium hydride, annealing the first powder and the second powder in a reducing atmosphere after the step of mixing, compacting a blend of the first and the second powders, and sintering the compacted blend to form a chromium base alloy. The chromium alloy may be used as an interconnect for a solid oxide fuel cell, and includes least one of iron or nickel greater than zero and equal to or less than 7 weight percent, yttria greater than zero and equal to or less than 2 weight percent, at least one of titanium or zirconium greater than zero and equal to or less than 1 weight percent and at least 90 weight percent chromium.

The invention discloses a method for preparing a large powder metallurgy TZM blank with uniform carbon and oxygen distribution, which comprises the following steps of: 1, weighing raw materials; 2, mixing powder, namely mixing the weighed four raw materials twice under vacuum or the protection of inert gas, mixing titanium hydride powder, zirconium hydride powder and carbon black powder to prepare mixed powder, adding a volatile organic solvent into the mixed powder, uniformly stirring to prepare suspension, adding the weighed molybdenum powder into the suspension for uniform mixing, and adding residual molybdenum powder for uniform mixing; 3, performing cold isostatic pressing; and 4, sintering by keeping the temperature at stages, namely adopting a vacuum sintering furnace and sintering at three stages, wherein the process comprises the following steps of: raising the temperature at the first stage, raising the temperature at the second stage, and sintering at high temperature. The preparation method has the advantages of reasonable design, simple and convenient operation, and good using effect. The carbon content in the center and on the surface of the prepared larger-size TZM blank can be controlled to be approximately consistent, and the oxygen content in the center and on the surface of the TZM blank also can be reduced to a lower level.

The process includes (a) mixing a titanium hydride powder having a particle size of <=150 mum with alloying metal powders (master alloys or elemental metal powders) having a particle size in the range of {fraction (1 / 15-2 / 5 of the maximal particle size of titanium hydride powder, (b) compacting the resulting powder mixture by molding at the pressures of 400-1000 MPa, (c) heating up to the sintering temperature of the predetermined alloy composition at variable pressures in a furnace chamber: initial heating to 400° C. in vacuum of less than 10<-2 >Pa, then, heating to a temperature range of 400-900° C. with the pressures up to 10<4 >Pa, which is controlled by hydrogen being emitted by the decomposition of titanium hydride contained in the compacted powdered alloy, and finally, heating to over 900° C. to the sintering temperature at the pressure continually decreasing to the starting vacuum level, and (d) sintering. Heating to the sintering temperature is performed at the rate of 10-15 grad / min. 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 method.

The invention discloses a preparation method for an alumina-based foam material. The method comprises the following steps: firstly, plating a layer of metal on the surface of carbon fiber, and adding the carbon fiber with the metal coating into aluminum or aluminum alloy fusant; then adding titanium hydride, and stirring evenly; and taking the carbon fiber out after foaming, and cooling to obtain the alumina-based foam material with enhanced fiber. In the invention, the carbon fiber is introduced into the preparation of the foamed aluminum material, thereby realizing that the stability of bubbles and material performance are improved; and compared with the prior art, the compressive strength of the foamed aluminum material prepared by the invention is higher than 6Mpa, the impact toughness is improved by about 30%, and the energy absorption capability is improved by more than 50%, thus the compression strength, the energy absorbing and damping performances of the alumina-based foam material with short enhanced carbon fiber are remarkably improved, and the pore wall toughness of the material is better.

The invention discloses an electrode active material for a lead-acid storage battery. The electrode active material comprises lead powder and a non-metallic titanium compound; the lead powder comprises one or more kinds of metal lead powder, ball-milling lead powder, Barton lead powder, Pb<2>O powder, PbO powder, Pb<2>O<3> powder, Pb<3>O<4> powder and PbO<2> powder; and the non-metallic titanium compound comprises one or more kinds of titanium sulfide, titanium nitride, titanium boride, titanium carbide, titanium hydride, titanium hydroxide, titanium silicide, a symbiotic blend of the abovementioned compounds on an atomic micro level or atomic cluster level, and doped compounds formed by doping the abovementioned compounds with one or more kinds of F, Sb, Sn, Ca, Bi, Co, Ca, Al, Mg, N, P, O and C. By virtue of the electrode active material for the lead-acid storage battery with an improved formula, the specific power, specific energy, charging-discharging efficiency, cycle life, low-temperature performance and the like of the lead-acid storage battery can be obviously improved.

The invention discloses a method for directly preparing a molding titanium matrix composite through titanium hydride powder. The method comprises following steps: blank preparing, wherein the titanium hydride powder and an additive are mixed and are manufactured into a powder compact through mould pressing; dehydrogenation, wherein the powder compact is heated, the heating rate keeps ranging from 50 DEGC / min to 200 DEG C / min until the temperature of the powder compact rises to 900 DEG C to 1500 DEG C, and the powder compact keeps warm for 5 minutes to 30 minutes at the selected temperature; molding, wherein the heated powder compact is moved into an extrusion device, extrusion is carried out at the certain pressure and the certain extrusion ratio so as to enable the powder compact to pass through an extrusion die, molding and solidifying are carried out, and the titanium matrix composite is formed; and cooling, wherein after extrusion is completed, the titanium matrix composite is cooled to the room temperature at the speed of 10 DEG C / min to 100 DEG C / min, and then is taken out. Raw material cost is reduced, the technological process is shortened, and introduction of impurities in the subsequent machining process is reduced. The method has the beneficial effects of being high in dehydrogenation speed, high in product compactness, and good in mechanical property.

The invention discloses a preparation method of a high-purity titanium powder for a large-scale integrated circuit. The preparation method comprises the following steps of: preparation and treatment of a high-purity titanium raw material, generation of titanium hydride through hydrogenation under a vacuum condition, vacuum ball-milling, vacuum dehydrogenation and vacuum graded package. The purity of the obtained high-purity titanium powder is more than or equal to 99.99 percent, the average diameter of the titanium powder is 8-10 micrometers, the maximum particle diameter is less than or equal to 20 micrometers, the oxygen content is less than or equal to 1500ppm, the nitrogen content is less than or equal to 400ppm, and the hydrogen content is less than or equal to 300ppm, wherein the vacuum hydrogenation is carried out at 400-550 DEG C, and the vacuum dehydrogenation is carried out at 350-450 DEG C only. The titanium powder prepared by using the preparation method disclosed by the invention has the advantages of high purity, small particle size and low detrimental impurity element content and completely accords with the production requirements of the large-scale integrated circuit.

A process including:(a) forming a powder blend by mixing titanium powders,(b) consolidating the powder blend by compacting to provide a green compact,(c) heating the green compact thereby releasing absorbed water from the titanium powder,(d) forming β-phase titanium and releasing atomic hydrogen from the hydrogenated titanium by heating the green compact in an atmosphere of hydrogen emitted by the hydrogenated titanium,(e) reducing surface oxides on particles of the titanium powder with atomic hydrogen released by heating of the green compact,(f) diffusion-controlled chemical homogenizing of the green compact and densification of the green compact by heating followed by holding resulting in complete or partial dehydrogenation to form a cleaned and refined compact,(g) heating the cleaned and refined green compact in vacuum thereby sintering titanium to form a sintered dense compact, and(h) cooling the sintered dense compact to form a sintered near-net shaped article.