Abstract: A method wherein a superhard abrasive material is sintered and simultaneously bonded to a sintered cemented carbide body inside a container under elevated pressure and temperature conditions (HP/HT-treatment), whereby said cemented carbide body is in contact with at least one other cemented carbide body which after the sintering is removed, is disclosed. At least the cemented carbide surfaces in contact with each other during the HP/HT-treatment is at least one coated with a 1-10 &mgr;m thick layer of a refractory oxide. The method is particularly applicable for making cemented carbide cutting inserts provided a superabrasive material and with a hole for clamping to a tool holder whereby said hole is filled with a cemented carbide plug during the HP/HT-treatment and removed thereafter. Preferably, both the plug and the insert blank are coated.

Abstract: A method of manufacturing a hollow piston including: fixing a core insert formed of a non-metallic material in a desired location within a mold cavity, injecting a mixture of non-metallic binder material and metal particles into the cavity so as to surround at least a portion of the core insert and form a piston, and eradicating the core insert from the piston.

Abstract: A process for producing a shaped article, comprising: preparing a first powder having high strength and rigidity after completion of forming, and a second powder having abrasion resistance and surface hardness after completion of forming; compacting those powders to provide a forming material comprising a base part comprising the first powder and a supplemental part comprising the second powder; and forming the forming material into a shaped article by plastic processing, thereby producing a shaped article in which the base part and the supplemental part have different characteristics. The first powder preferably comprises a rapidly-solidified alloy powder and the second powder preferably comprises at least one member selected from among Al2O3, Si3N4, BN, SiC, Al4C3, Al8B2O15 and B2O or a mixture of the member and the first powder which may be the same one actually used as the first powder or another one having a different compositions from that of the actually used first powder.

Abstract: A method for molding relatively complex and large shapes by a co-injection molding process which results in a significantly less expensive and lighter molded product. The process steps include first injection molding a thermoplastic material highly densified with ceramic or stainless steel particulate material to form a shell structure having a homogeneous dispersion of the ceramic or stainless steel material within its matrix and then injecting a significantly less expensive material into the core of the preformed thermoplastic/ceramic or stainless steel structure and thereafter sintering the resulting molded structure. The resultant structure is a hollow shell of highly densified ceramic or stainless steel.

Abstract: A gelcasting method of making an internally graded article includes the steps of: preparing at least two slurries, each of the slurries including a different gelcastable powder suspended in a gelcasting solution, the slurries characterized by having comparable shrinkage upon drying and sintering thereof; casting the slurries into a mold having a selected shape, wherein relative proportions of the slurries is varied in at least one direction within the selected shape; gelling the slurries to form a solid gel while preserving the variation in relative proportions of the slurries; drying the gel to form a dried green body; and sintering the dry green body to form a solid object, at least one property thereof varying because of the variation in relative proportions of the starting slurries.

Abstract: The invention concerns a process for the production of a porous lithium cobaltite electrode plate with a large inner surface and low polarization resistance. Lithium carbonate powder and cobalt metal powder are uniformly mixed together and then films are produced from the mixture and plates from the films, which plates are sintered and then placed in an air stream for several hours at a temperature between 400° C. and 488° C. until the conversion of said plates to lithium cobaltite electrode plates with an extremely large inner surface has taken place.

Abstract: A synchronizer ring of the transmission of an automobile comprising an inner ring made of the powder of sintered ferroalloy, and an outer ring made of the brass-sintered alloy, the inner ring and the outer ring are integrally united by the brazing. The synchronizer ring is manufactured by method comprising step for pressurizing the powder of the sintered ferroalloy with the pressure 6˜7 ton/cm2 and forming the body of the outer ring under the reducing atmosphere at the temperature of 1,140±20° C., step for forming the inner ring with the brass-sintered alloy and plating the outer ring with nickel, step for spreading the brazing powder on the surface of the inner ring; and step for brazing the inner ring and the outer ring and integrally uniting each other under the reducing atmosphere at the temperature of 900˜920° C. for 20˜40 minutes.

Abstract: A method of fabricating rotary-type drill bits, drilling-related structures, and other articles of manufacture. The method includes fabricating a machinable matrix, machining the matrix, and dispersing a binder material throughout the matrix. The matrix of the rotary-type drill bit may be fabricated by layered-manufacturing techniques or by disposing a particulate or powdered material into a mold and binding the particles together with a resin or by sintering. The matrix may have the desired dimensions and features, the approximate dimensions and features, or lack desired dimensions or features of a drilling-related structure or other article of manufacture. The matrix is machined to correct any anisotropies or imperfections of the matrix, to refine features of the matrix, or to define the features in the matrix. The machined matrix may be infiltrated with a binder material to define a drill bit body.

Abstract: The invention is a method of making a novel spherical form of granulated products that can be effectively used in various product forms in drug, fertilizer, foodstuff, feed, agricultural chemical, catalyst, ceramics, powder metallurgy, detergent, plastic, and bio-material fields, for instance, as catalysts, lightweight materials, sound-insulating materials, microcapsules, and lightweight aggregates. To obtain a granulated product which is a spherical solid shell having a spherical space therein, a polymer having high water absorption properties is swollen by the absorption of water therein, and then brought in contact with a powder to form a powder layer all over the surface of the swollen polymer particle. This spherical particle is then dried and fired if necessary.

Abstract: In a shaft-type cutter body of hard material including a shaft for mounting the cutter in a chuck and a head including cutting areas with cutting edges disposed around the circumference of the head, the shaft and the head are formed integrally by injection die casting of powdered raw material followed by sintering. The unfinished cutter body includes cutting edge sections with recessed areas adjacent the cutting edge front surface area for receiving wood chips and delimiting the cutting edge surface area and a surface area receding radially inwardly from the rear cutting edge surface area of the cutting edge so as to limit the rear cutting edge surface area.

Abstract: For the manufacture of a metallic honeycomb body which is wound, layered or looped from at least partially structured sheet metal layers, it is proposed to provide at least the structured sheet metal layers with a layer of rolling oil, to the extent that this is not already present in the process for manufacturing the sheet metal layers. A step for partially thermally removing highly volatile components of the rolling oil can follow. The honeycomb body manufactured from the sheet metal layers is brought into contact with a brazing powder which remains adhered to the rolling oil in particular in the area of the contact lines between the sheets. The honeycomb body is subsequently subjected to a brazing procedure in a high temperature brazing furnace under vacuum or a protective gas.

Abstract: A method for manufacturing machining tools out of composite powdered metal which is first formed to approximate the desired shape of the machining tool; then bonded metallurgically; and machined to the desired finished shape. Desirably, the forming step employs at least two distinct powdered metals, the first formed to the outer shape over the portion of the tool that interfaces with the work piece and selected to exhibit the desired hardness and wear-resistance properties. The second material supports the hollow form of the first material and includes a shank to interface with the machine that the tool will be employed with. The second material is chosen to exhibit the desired ductility, surface hardness, abrasion resistance and reduced cost. Additional materials can be used for different facets of the tool to obtain an optimum balance of long life, efficient operation and low cost.

Abstract: A method of manufacturing a ceramic component including at least one cermet body, especially a cermet electrode, in which the costs are reduced and the ceramic component can be produced in accordance with requirements with an integrated cermet body in a reproducible manner. The cermet body initially is produced as a green compact; the cermet body then is inserted into the ceramic composition; the ceramic composition subsequently is consolidated together with the green compact cermet body, e.g. by pressing, and the resulting assembly is finally sintered.

Abstract: According to the present invention there is provided a method of making a cutting insert with a hole for clamping to a tool holder wherein a super-hard abrasive material is sintered and simultaneously bonded to a sintered cemented carbide body with a hole inside a container under elevated pressure and temperature conditions. During sintering the hole is filled with a plug which after sintering is removed.

Abstract: A process is disclosed for manufacturing thin-walled pipes made of a heat- and wear-resistant aluminium-based material. A billet or tube blank made of a hypereutectic AlSi material is produced, optionally overaged by an annealing process, then extruded into a thick-walled pipe or round bar. The thus obtained preform is severed and extruded into a thin-walled pipe. This process is particularly suitable to manufacture light metal cylinder liners for internal combustion engines, since the thus manufactured cylinder liners have the required properties regarding wear-resistance, heat-resistance and lowered pollutant emissions.

Abstract: There is disclosed a method for forming compacts having a hole extending along a direction crossing the compressing direction. In the method, a powder or a pre-compressed compact and a core for forming a hole are assembled in a cavity. The core and a die are set in a condition that the core can move in the compressing direction. The punch compresses the powder and forms a compact. The core does not engage with the die, whereby the core is not exerted with load. Therefore, the method does not need control of compressing for avoiding exertion of load on the core, and can prevent transformation or break of the core. The compact in which the core is inserted is drawn out from the die, so that damages such as break or crumble of the compact is prevented in drawing out.

Abstract: A method of manufacturing a drill bit or other drilling-related structure used for drilling into subterranean formations is herein disclosed where a blank is formed by placing a ferrous metal powder such as steel into a mold, sintering the ferrous metal powder to form a preformed blank, packing an abrasion- and erosion-resistant material such as tungsten carbide powder around the preformed blank, and infiltrating the preformed blank and tungsten carbide with a common binder such as a copper-based binder. For some materials, during sintering, the preformed blank may shrink in size relative to the mold enough to provide space between the mold and the preformed blank for a layer of abrasion- and erosion-resistant material. With other materials, a separate blank mold may be used to form the sintered blank which can then be inserted into the mold for infiltration.

Abstract: In a process for producing powder metallurgy objects containing two or more individually formed pieces, the individual formed pieces or powder compacts which are comprised of powder and a binder are joined together. A polymer compatible with the binder is sandwiched between two such powder compacts. A lamination joint is formed. The polymer is then softened, and a resultant aggregate body is thermally processed to remove the binder and polymer. The resulting object has no residual interface between the original individually formed pieces. There is no discernable boundary at the lamination joint. The final part is homogeneous and uniform with no foreign material or structural imperfections at the joint.

Abstract: A method of densifying the wall of an opening in a powder metal preform includes forcibly extending a densification tool through the opening having a plurality of radially enlarged forming portions arranged in axially spaced succession from smallest to largest which act to enlarge and densify the preform material and impart beneficial compressive stresses. The space between successive forming portions enables the preform material to recover elastically between adjacent forming sections to maximize induced compressive stresses.

Abstract: The internal gear is a bottomed cylindrical component, which has the boss portion fitted over the outer circumferential surface of the shaft, the disk-shaped flange portion extending radially outwardly from the boss portion, and the cylindrical gear body having a tooth portion in its inner circumferential surface and connecting integrally to the outer circumferential part of the flange portion. The flange portion is virtually conical on its outer side surface and tapered from the outer diameter side toward the inner diameter side, i.e., from the gear body toward the boss portion. This construction is thicker at the boss portion side than at the gear body side. Further, the density of the flange portion is almost inversely proportional to the thickness and is lower at the boss portion side than at the gear body side. The cylindrical gear body has a density distribution such that the central part of the gear body is lower in density than the end portions in a tooth trace direction of the teeth portions.

Abstract: A synchronizing ring 10 having an annular structural part 11 and a frictional layer 12 is manufactured by filling a mold 20 with a material for the structural part or a material for the frictional layer and compacting the material filled in the mold 20, filling the mold with a material for the frictional layer or a material for the structural part and compacting the material filled into the mold to unify the structural part and the frictional layer, and sintering the unified structural part 11 and frictional layer 12 in a sintering furnace. The frictional layer 12 can be combined with the structural part 11 without forcibly mounting the frictional layer 12 on the structural part 11. The material for the frictional layer need not be presintered, and the frictional layer can be formed by a single sintering cycle.

Abstract: An object of the present invention is to provide composite ceramic powder containing composite ceramic particulates as constituent particulates. Each of the composite ceramic particulates is constituted of a group of first particles and a group of second particles in which the first particles are localized around the second particles. A spray pyrolysis is used to localize the first particles around the second particles, thereby producing such composite ceramic particulates.

Abstract: A ball linear guide includes a ball-cyclic-running path composed of a loaded ball groove and a non-loaded ball groove, wherein said ball linear guide main body is of a single structure including: a dovetail groove having at both ends thereof an inlet and an outlet for balls; and a tunnel-like non-loaded ball hole being continuous to said dovetail groove with said inlet and said outlet being as both ends thereof. The tunnel-like non-loaded ball hole is manufactured by forming, around a tunnel-like core, an iron alloy containing about 0.85 wt % of C, about 0.3% of Si, about 0.3 wt % of Mo, about 4.0 wt % of Cr, about 5.0 wt % of Mn, about 6.0 wt % of W, about 2.0 wt % of V, and/or about 0.6 wt % of Ti. The ball linear guide allows smooth rotation of balls at a high speed with reduced noise, and also it exhibits a long service life. Further, in the manufacturing method, the number of parts and the number of working steps are reduced, and the assembly is easily performed without great care.

Abstract: A method of injection molding ceramic or metal parts having an internal cavity or other complicated shape. A fugitive core is formed of a particulate and a first binder. The core is then suspended in a conventional injection molding cavity. The part is then injection molded by injecting a ceramic or metal powder mixed with a second binder while in a plastic state into the mold cavity and around the suspended core. Once the second different binder hardens or gels, the molded part together with the core are removed from the mold cavity. The molded part and core are then subject to a debinding process to debind the first binder to thereby remove the core. Because two different binders were used for the core and molding, the binder used to form the molded part remains unaffected when removing the core.

Abstract: Provided is a powder and binder system for manufacturing sintered parts from particulate material, and a method of injection molding parts for sintering. The particulate material includes ceramic, metallic and intermetallic powders. Preferably, selected powder particles are coated with one or more additives depending on their shape and surface chemistry to create a powder system. The additives may include antioxidants, coupling agents, surfactants, elasticizing agents, dispersants, plasticizer/compatibilizers and lubricants. The surface active additives are designed to improve the interface between the powder and the binder. The powder system may be mixed or compounded with a binder system in an inert atmosphere to form a powder and binder system, or feedstock, for powder molding. The binder system, may contain one or more components which are removed prior to the sintering the powder. The powder and binder system may also be molded about an expendable core which is extracted prior to sintering.

Abstract: A method for the manufacture of a precious metal product is disclosed which consists essentially of the steps of forming in a desired shape a clayish composition essentially consisting of a precious metal powder, an organic binder, and water, solidifying the formed clayish composition to obtain a solid formed mass, attaching an accessory member fast to the solid formed mass with a portion of the clayish composition serving as an adhesive agent, and firing the resultant composite having the accessory member fastened to the solid formed mass.

Abstract: The invention is a complex-shaped article, comprising an article prepared by joining at least one multi-phase ceramic-metal part and at least one shaped part of another material, wherein the theoretical density of the at least one ceramic-metal part is greater than 80 percent.In another aspect, the invention is a process for preparing complex-shaped articles, comprising:(a) forming at least one ceramic-metal part;(b) forming at least one shaped part of another material; and(c) joining the at least one shaped ceramic-metal part with the at least one shaped part of another material such that a complex-shaped article is formed.The invention is a less costly and time-consuming process for preparing complex-shaped composite articles wherein the articles are formed of two or more selected materials wherein one of the materials is a ceramic-metal composite.

Abstract: The invention relates to a method for manufacturing a dental restoration, comprising the steps of applying a powdered dental metal comprising composition to a refractory model mass, which powdered dental metal consist of at least three alloys each having a different solidus temperature, the difference between the successive solidus temperatures always ranging between 25 and 100.degree. C., heating the powdered dental material in such a manner that one porous mass is formed, and infiltrating the porous mass with a filler metal alloy in such a manner that the refractory model mass is provided with a homogenous metal coating.

Abstract: A joint body in which aluminum and silicon nitride are strongly joined with each other is provided at a low cost, thereby providing a lightweight part which is excellent in sliding property as a mechanical part of an internal combustion engine of an automobile or the like. The joint body includes a base material which is mainly composed of aluminum, and a member consisting of a silicon nitride sintered body which is substantially directly joined to the base material. A powdery or bulky base material (2) mainly composed of aluminum, and a member (1) consisting of a silicon nitride sintered body are charged in a mold and heated under pressurization, thereby joining the same with each other.

Abstract: A fused deposition process is used to form three-dimensional solid objects from a mixture including a particulate composition dispersed in a binder. The article is formed by depositing the mixture in repeated layers of predefined thickness, with each layer solidifying before the next adjacent layer is dispensed. Following formation and a binder removal step, the article may be at least partially densified to achieve preselected properties. The process permits three-dimensional articles to be formed relatively quickly and inexpensively, without the need for molds or other tooling.

Abstract: A disk drive is disclosed including a substantially monolithic stator. The stator is formed by a metal injected molding (MIM) process in which high silicon iron is sintered to produce a stator made from loss magnetic material. The low loss magnetic material is a low hysteresis loss, high resistivity material. A substantially monolithic stator without multiple laminations is thus achieved. Avoiding stator laminations in this manner permits the fabrication of a disk drive having a significantly reduced vertical profile while still suppressing undesired eddy current and hysteresis losses in the stator. The stator is advantageously directly machined with a central bore to receive a bearing assembly for the spindle of the hub of the drive motor. The disclosed stator geometry is optimized in three dimensions to minimize stator volume and maximize the stator winding volume.

Abstract: The present disclosure is directed to the fabrication of a highly wear layer either directly upon an article or tool support structure or body, or as a wear resistant insert or element which is subsequently attached to the tool body. The wear material is formed by sintering particulate material using the absorption of microwave energy as a means of heating. The disclosure also encompasses post manufacture annealing, using heating by microwave radiation, of both highly wear resistant inserts and composite articles which consist of a wear resistant layer and a body. The wear resistant material, whether fabricated directly upon an article or fabricated separately and subsequently affixed to an article, provides an abrasive wear surface and greatly increases the life of the article. Microwave sintered wear resistant surfaces for mills, drills, grinders, brakes, bearings, saw blades and other articles and assemblies are disclosed.

Abstract: The invention relates to a method for the manufacturing of a composite metal product. More particularly, the invention relates to a method for the manufacturing of a composite product consisting of at least two stainless steel materials having different chemical compositions, particularly a composite stainless product on which decorative patterns can or has been produced by etching.It is significant feature of the invention that at least two stainless steel materials having different chemical compositions are bonded together through hot isostatic compaction at a pressure exceeding 600 bar and a temperature exceeding 1000.degree. C., at least one of said materials consisting of powder, for the achievement of a consolidated body.

Abstract: A method of producing a cutting insert which includes the steps of: providing a generally homogeneous powder blend of powder components; forming the powder blend into a green body wherein the green body includes a rake face and a flank face with a cutting edge at the juncture of the rake face and the flank face; honing the cutting edge of the green body; and consolidating the green body with the honed cutting edge so as to form a consolidated body with a honed cutting edge.

Abstract: A method for fabricating articles of high-temperature aluminum alloys having a compressional strength of at least 20 kg/mm.sup.2 at temperatures of 300.degree. C. or greater, is disclosed. The method comprises the steps of: (a) forming a porous preform from particles of a first aluminum alloy via cold-pressing, the preform having the shape and dimension of the aluminum alloy article to be fabricated; (b) squeeze-casting a molten second aluminum alloy into void spaces of the porous preform to form an aluminum composite containing the first aluminum alloy, which serves as a reinforcement phase, dispersed in the second aluminum alloy, which serves as a matrix phase; (c) wherein the molten second aluminum alloy is cast at such temperatures so as to cause a surface of the first aluminum alloy particles to melt and thereby form a strong bonding with the second aluminum alloy.

Abstract: A fused deposition process is used to form three-dimensional solid objects from a mixture including a particulate composition dispersed in a binder. The article is formed by depositing the mixture in repeated layers of predefined thickness, with each layer solidifying before the next adjacent layer is dispensed. Following formation and a binder removal step, the article may be at least partially densified to achieve preselected properties. The process permits three-dimensional articles to be formed relatively quickly and inexpensively, without the need for molds or other tooling.

Abstract: A method of controlling chosen geometries in sintering operations uses an insert in the preform which is to be sintered, which insert can withstand sintering temperatures without distortion, and which will not bond to the preform and thus prevent removal subsequent to sintering. In powder metal sintering, inexpensive ceramic alumina inserts satisfy these criteria. A powdered metal preform is caused to shrink onto a precisely formed ceramic insert, thereby to determine final shape accurately. An insert larger in diameter than that of the uninserted undistorted preform final diameter may be used if potential impact on geometry density is factored into its selection. An insert shape other than that of the preform undistorted final shape may be used to create final geometries different by design than those of the preform.

Abstract: A process for constructing a circular metallic article which includes a hub and a plurality of vanes mounted on the periphery of the hub wherein the vanes are placed in position around the hub, formers are arranged between the blade portions of the vanes, a dimensionally stable belt having a low thermal expansion coefficient is placed circumferentially around the vanes and the formers, and the assembly is subjected to an isostatic compression at the isothermal forging temperature and pressure of the materials of the hub and the vanes such that the vanes are diffusion welded to the hub and the blade portions of the vanes are compressed to shape.

Abstract: The present invention relates to novel methods for shaping a filler material into a porous preform and subsequently filling at least a portion of the porous preform with a second material to form a composite body. Specific aspects of the invention include novel combinations of materials to form the preform in combination with novel processing techniques for shaping the combinations of materials into a porous preform.

Abstract: A new class of binders for binding finely divided inert inorganic molding particles when shaped into objects by known mechanical shaping techniques such as injection molding. The novel binders are solid polymer solutions containing a major fraction of a low molecular weight solid relatively non-volatile chemical as solvent in which is substantially dissolved a minor fraction of at least one high molecular weight solid polymer. The solid polymer solution binders when molten are homogeneous solutions and can be readily uniformly mixed with the usual inorganic molding particles into a readily flowable mixture which can be shaped and solidified. When solidified, the polymer and solid chemical remain a substantially homogeneous solution without appreciable phase separation.

Abstract: The present invention relates to alloys in which the essential constituent is aluminum, metal deposits produced from these alloys, substrates coated with these alloys and the applications of these alloys. The alloys of the present invention are characterized in thatthey have the following atomic composition (I):Al.sub.a Cu.sub.b Co.sub.b' (B,C).sub.c M.sub.d N.sub.e I.sub.f(I)a+b+b'+c+d+e+f=100, expressed as number of atoms, a.gtoreq.50, 0.ltoreq.b<14, 0.ltoreq.b'.ltoreq.22, 0<b+b'.ltoreq.30, 0.ltoreq.c.ltoreq.5, 8.ltoreq.d.ltoreq.30, 0.ltoreq.e.ltoreq.4, f.ltoreq.2, where M represents one or more elements chosen from Fe, Cr, Mn, Ni, Ru, Os, Mo, V, Mg, Zn and Pd; N represents one or more elements chosen from W, Ti, Zr, Hf, Rh, Nb, Ta, Y, Si, Ge and the rare earths; I represents the inevitable production impurities;and they contain at least 30% by mass of one or more quasicrystalline phases.

Abstract: Aluminum nitride powder, aluminum nitride platelets, powdered solid solutions of aluminum nitride and at least one other ceramic material such as silicon carbide, and composites of aluminum nitride and transition metal borides or carbides are prepared by combustion synthesis at low gaseous nitrogen pressures. Porous bodies of aluminum nitride or composites of aluminum nitride and transition metal borides or carbides are also prepared by combustion synthesis at these pressures. The porous bodies are suitable for infiltration, either as formed or after being coated with at least one layer of a silicate material, by polymers or metals.

Abstract: A method for producing high density and/or high surface density ferrous powder metal parts has the steps of: compacting a iron-containing powder substantially free of graphite at room temperature and at about 40-50 tsi; sintering the green compact in an inert, non-oxidizing environment at a temperature of about 2050.degree.-2300.degree. F.; repressing the sintered compact at room temperature at about 60 tsi; carburizing the repressed compact at high temperature to form a layer of relatively high carbon concentration to a depth of at least about 0.010 inches; and immediately quenching the hot carburized compact followed by a tempering treatment.

Abstract: A sintered hardmetal (cemented tungsten carbide) product has a core made of a first grade of cobalt or nickel bonded cemented tungsten carbide with a surface layer of a second grade of distinctively different cobalt or nickel bonded cemented tungsten carbide. The first grade, or core, is generally a relatively tough (impact resistant or shock resistant) grade of cobalt or nickel bonded hardmetal while the surface layer is a relatively hard (wear resistant) grade of cobalt or nickel bonded hardmetal. The surface layer may, however, be designed to provide corrosion resistance or crater resistance to the article. If desired, multiple layers can be provided with gradient layers included between the core and surface layer. Typical uses of such layered composite carbide articles are as tool materials such as cutting tools or cutting tool inserts, mining tools or wear parts of any design typically manufactured in the cemented carbide industry.

Abstract: A brazeable aluminum material is composed of an aluminum core and a brazing agent layer consisting of a brazing agent thermally sprayed onto covering a surface of the core. A number of unmolten minute particles of the brazing agent are present in the brazing agent layer, which contains at least an aluminum-silicon alloy and/or a mixture of aluminum and silicon. Characteristic features of a method of producing the brazeable aluminum material are the steps of: preparing a powder composed of minute particles; and thermally spraying the powder onto the aluminum core in such a state that only a surface of each minute particle is molten, with a pith of the particle remaining unmolten. The powder is an Al-Si alloy and/or a mixture of Al powder and Si powder.

Abstract: In a method for the manufacture of an encased high critical temperature superconducting wire by the "powder in tube" method, prior to the introduction of a compressed rod of superconducting material into a silver tube, the rod is heat treated so that grains of unwanted phase are reabsorbed. The tube can be drawn more easily, and strands can be produced with a regular geometry and no defects. The wire is constituted by 15 .mu.m to 20 .mu.m thick filaments (30) with a form factor of more than 60.

Abstract: Composites are grown by contacting pressed aluminum powder forms or metal masses with oxide powder as the oxygen supply source needed for composite growing and then heating, with reaction sintering by a thermite reaction between the oxides and aluminum supplied by capillary action.

Abstract: A composite jet engine compressor ring is made by casting a tape reinforced with ceramic fibers, winding the cast tape around a mandrel to form an unconsolidated ring, heating the ring to drive off binder, and pressing at a high temperature to form a unitary composite ring. Compression of the ring in an axial direction during hot pressing results in a desired axial spacing between adjacent fibers. The tape is preferably cast from a mixture of titanium base metal particles and a polyisobutylene binder dissolved in an organic solvent.

Abstract: A metal casing for a semiconductor device is manufactured by a powder metallurgy injection molding process which uses infiltration. The metal casing includes a base member and an enclosure member arranged on the base member. The base member and the enclosure member are formed of an alloy including 20 to 50 percent by volume of copper, equal to or less than 1 percent by weight of nickel and remainder of tungsten or molybdenum. The metal casing is manufactured as a net-shape product by a process which includes the steps of mixing tungsten powder and nickel powder having average particles sizes equal to or less than 40 .mu.

Abstract: An improved method is disclosed for encasing an object in a shell or layer of outer material. The encased object and the outer material are formed from sinterable metal or ceramic particulate material. Both the object to be encased and the shell or encasement are formed by extrusion. Novel methods are disclosed by which the object and the outer material can be simultaneously formed by co-extruding the sinterable particulate materials, or by extruding the outer layer onto a formed object using the die assembly of the invention.