Abstract: The object is to provide a method of degassing or solidifying an aluminum alloy powder by utilizing an induction heating as a degassing means in a step of forming and solidifying an aluminum powder or aluminum alloy powder, whereby the disadvantages of the prior art can be overcome. The feature of the present invention consists in preforming an aluminum powder, aluminum alloy powder or aluminum composite alloy powder or mixed powders thereof with non-metallic grains to give a specific electric resistance of at most 0.2.OMEGA.cm, subjecting the preform directly to induction heating in an atmosphere at normal pressure, temperature-raising to 400.degree. to 600.degree. C. at a temperature gradient of at least 0.4.degree. C./sec in a temperature range of at least 300.degree. C. and removing heat-decomposable volatile components to obtain a hydrogen content of at most 10 ppm.

Abstract: A method of producing a tungsten heavy alloy product according to a powder metallurgical procedure utilizing the injection molding technique which enables production of tungsten heavy alloy products having high dimensional accuracy and complex configuration and yet having high physical strength and toughness in high productivity and at low cost. A powder mixture of tungsten powder and nickel powder, iron powder or copper powder is mixed with an organic binder and they are kneaded together. The kneaded mixture is injection molded into a predetermined shape, and thereafter the binder is removed from the molded product. Subsequently, the molded product is sintered in a temperature range of from the melting point of the bond phase of nickel, iron or copper to +50.degree. C. relative to the melting point.

Abstract: A process for making a non magnetic Ni-WC cemented carbide composition and articles made from the same. The process comprises:(a) dewaxing a green Ni-WC cemented carbide substrate in the presence of hydrogen gas at a pressure less than about 1000 torr and at a sufficient flow rate and a sufficient time to affect the saturation magnetization and magnetic permeability of the Ni-WC cemented carbide substrate;(b) pumping out the hydrogen gas and introducing argon at a pressure in the range of about 1 torr to 1000 torr;(c) increasing the temperature up to the sintering temperature to facilitate sintering of the Ni-WC cemented carbide substrate; and;(d) cooling the furnace to room temperature.The articles made according to this invention are useful as wear parts for electronic instruments and as punches form aluminum beverage cans.

Abstract: A porous electrode for pacemakers is comprised of a plurality of platinum globules sintered together to form a porous mass of semi-hemispherical shape at the end of a platinum electrode stem. The globules, which are themselves made by sintering together spherically-shaped particles of approximately one micron diameter, provide the globules with an irregular outer surface of high total surface area. The globules have diameters within a critical range of 40-200 microns. The large total surface area of the globules improves the sensing function of an electrode configuration of given size and surface area, while the globule diameters of 40-200 microns have been found to beneficially accommodate tissue ingrowth within the electrode. In a preferred method of making the electrode, the platinum globules, which are formed by sintering together platinum particles of much smaller size, are mixed with organic solvent and organic binder to form a paste.

Abstract: Purely powder-metallurgical processes or sinter-impregnation processes are often used to manufacture CuCr contact materials. Here the aim is to obtain the lowest possible residual porosity, which should be <1%. According to the invention, a powder moulding of the components is densified in two stages; the first stage is a sintering process with a densification of the sintered body to a closed porosity, and the second stage is a hot-isostatic pressing operation (HIP), in which the unencased workpieces are taken to a final density amounting to a space occupation of at least 99%. Thus, an economical method of manufacturing high grade material is obtained. It is possible to produce multi-layer contacts or self-adhesive bonds between the sintered body and a solid substrate, e.g. a copper contact bolt.

Abstract: The present method relates to molding metal particles by forming a flowable mixture. The metal particles are mixed with a polyorganic acid which chemically reacts with the metal particles. The flowable mixture is transferred to a mold before the chemical reaction between the metal particles and the polyorganic acid proceeds so far as to substantially increase the viscosity of the flowable mixture. A green preform is created by applying pressure to the mixture in a mold. The green preform is heated to a first temperature to vaporize substantially all of the non-organic components of the reacted polyorganic acid from the preform. The preform is then heated to a second temperature greater than the first temperature to sinter the metal particles.

Abstract: A process for producing a thermoelectric material comprises molding a material powder comprising two or more elements selected from the group consisting of bismuth, tellurium, antimony and selenium and having average diameter in the range from 0.05 to 100 .mu.m and sintering the molded material powder with or without hot isostatic pressing. The material powder may be calcinated before the molding. A process for producing a thermoelectric element comprises cutting out pieces of a pillar-like shape from each of a p-type thermoelectric material and a n-type thermoelectric material, connecting the pieces cut out from the p-type thermoelectric material and the pieces cut out from the n-type thermoelectric material alternately with electrodes at the upper faces or the lower faces of the pieces and attaching insulating base plates to the surfaces of the electrodes. The p-type thermoelectric material and the n-type thermoelectric material are respectively produced by the process described above.

Abstract: Disclosed is a method of controlling the densification behavior of a metallic feature in a ceramic material, the method including the steps of:obtaining an unsintered ceramic material having at least one metallic feature therein;providing at least the metallic feature with a predetermined amount of carbonaceous material;heating the ceramic material and metallic feature to a predetermined temperature sufficient to cause sintering of the ceramic material, the metallic feature being at least partially inhibited from densifying at the predetermined temperature by the presence of the carbonaceous material.key aspect of the invention is subsequently removing with an oxidizing ambient some or, all of the carbonaceous residue at a predetermined temperature for the optimization of the physical characterization of the fired metallic component in ceramic material without adversely affecting distortion and alignment of the metallic feature.

Abstract: Densified boron carbide-aluminum, ceramic-metal composites that are substantially free of AlB.sub.12, AlB.sub.12 C.sub.2 and Al.sub.4 C.sub.3 result from a two stage process. Admixtures of boron carbide are densified under pressure in stage one, In stage two, the densified admixture is heat treated. In both stages, the temperature is less than 800.degree. C. If the temperatures do not exceed 600.degree. C., the resultant densified cermet has only three phases: a) boron carbide; b) Al.sub.4 BC; and c) aluminum.

Abstract: The present invention relates to a manufacturing process for ring-shaped parts having high wear resistance and mechanical strength. Raw material powder containing (weight %) C at 0.4-0.9%, Ni at 1.5-4.0%, Mo 0.2-0.6%, and a remainder consisting of Fe and unavoidable impurities, is compacted and shaped, thereafter sintered and forged; obtained sintered body is hardened by heating at a temperature within a range of 800.degree.-950.degree. C., thereafter high temperature tempering is carried out for 20-60 minutes at a temperature within a range of 570.degree.-700.degree. C.; then the surface layer of the inner periphery and/or outer periphery of said sintering body is heated; then if required, low temperature tempering (temper process) is carried out at a temperature within a range of 160.degree.-220.degree. C.

Abstract: A method for controlling the remanance of a sintered magnet by varying the time when the orienting field is applied during cold compression. The method comprises obtaining powders of an appropriate particle size, compressing the powders in an oriented field, sintering, heat treating, machining and magnetizing to technical saturation. The cold compressing in an orienting field takes place at a precompression rate of more than 15% before the orienting field is applied. The method applies to magnets of all shapes which must have magnetic induction well defined in modulus and in direction, particularly annular magnets for traveling wave tubes.

Abstract: A coated cemented carbide alloy, excellent in toughness as well as wear resistance and which is used for cutting tools and wear resistance tools is provided herein. This coated cemented carbide alloy is composed of a cemented carbide substrate consisting of a hard phase of at least one member selected from carbides, nitrides and carbonitrides of the Group IVb, Vb and VIb metals of Periodic Table and a binder phase consisting of at least one member selected from the iron group metals, and a monolayer or multilayer provided on the substrate consisting of at least one member selected from the carbides, nitrides, oxides and borides of Group IVb, Vb and VIb metals of Periodic Table, solid solutions thereof and aluminum oxide, and wherein a binder phase-enriched layer is provided in a space 0.01 mm and 2 mm below the surface of the substrate with A-type and/or B-type pores inside the binder phase-enriched layer.

Abstract: The present invention presents a method of processing ferrous powder materials to produce high strength small component parts suitable for use in miniaturized electrical and electronic equipment. The processing steps involve, in part, mixing with a binder, dewaxing or presintering at a temperature higher than in the conventional dewaxing process, and final sintering at a temperature lower than the conventional sintering process to produce parts having density values of over 96% theoretical density and high mechanical strength properties in a shorter sintering time than the conventional processing method.

Abstract: A method is provided for producing a high strength iron based component by powder metallurgical techniques but without sintering. A powder composition of iron-based particles coated or admixed with a thermoplastic material is compacted under heat and pressure by traditional powder metallurgical techniques. The pressed component is then heat treated at a temperature above the glass transition temperature of the thermoplastic material for a time sufficient to bring the component to the heat treatment process temperature. The resulting component has increased strength and can be used as a structural component or as a magnetic core component.

Abstract: A process for producing strip products which comprises forming an aqueous slurry of a suspension of metallic particles in a film forming cellulose derivative, depositing a quantity of the slurry onto a support surface, drying the slurry to form a self supporting flat product, removing the dried product from the support surface and roll compacting the same to produce a green strip. The green strip is supported on a moving surface as it travels to and enters a heater in which it is heated in an oxidising atmosphere to a temperature at which substantially all traces of the cellulose derivative are removed. The heated strip is fed while still on the moving support surface to and through a sinter furnace to form a coherent strip of the required composition.

Abstract: A porous metal block for selectively removing solder or braze from a substrate is disclosed. The block comprises a plurality of protrusions which absorb solder or braze through capillary action. The number and dimensions of the protrusions vary depending on the application. Also disclosed is a process for making such a block involving a unique two steps sintering process.

Abstract: A process for the powder-metallurgical production of a workpiece by filling a binder-free and solvent-free, dry metal powder or ceramic powder into a mold, precompacting the powder by tapping and presintering it for 1/2 hour to 1 hour at 0.65 to 0.85 times the absolute melting temperature without significant shrinkage, adjacent powder particles being joined merely at their contact points by necking to give a skeletal formed body. The formed body is taken out of the mold and finish-sintered at at least 0.9 times the absolute melting temperature for at least 1 hour without additional support by a mold. Advantageously, the sintered body is additionally hot-isostatically pressed containerless in order to reach at least 98% of the theoretical density.

Abstract: The process serves for producing a carbon-containing sintered compact from steel powder. In this process, the steel powder is heated to sintering temperature in an atmosphere containing, at least for a time, carbon monoxide, is kept at sintering temperature over a predetermined period of time and the sintered compact formed thereby is subsequently cooled.In this process, the carbon content of the sintered compact to be produced is to be set to a predetermined value in a way which is simple and suitable for mass production.This is achieved by the partial pressure of the carbon monoxide in the atmosphere being changed selectively during the execution of the production process, and by this change being controlled in such a way that the carbon content of the sintered compact is set to the predetermined value after execution of the production process.

Abstract: Ti-W target material for sputtering includes a structure composed of a W phase, a Ti phase, and a Ti-W alloy phase of which 20% or more consist of the area ratio of a micro structure covering the cross section of the Ti-W target material. The Wi-W target material further includes dispersed tungsten particles, the Ti-W alloy phases substantially surrounding the W grains, and the Ti phases dispersed adjacent to the Ti-W alloy phase or the W grains. The formation of the Ti-W alloy phases is capable of reducing a substantial amount of the Ti phase in the target material. It is thus possible to prevent the generation of particles attributable to a difference between sputtering speeds of Ti and Ti-W.

Abstract: A ferritic alloy with a wear resistive oxide scale is obtained through the steps of pressing a ferritic alloy powder containing aluminum into a powder compact of a desired configuration, sintering the powder compact in a non-oxidizing atmosphere to provide a resulting sintered product, and heat-treating the sintered product in an oxidizing gas atmosphere in order to precipitate in the surface thereof alumina in the form of an alumina scale as the wear resistive oxide scale which is responsible for improved surface hardness or wear resistance. Due to the inherent porous nature of the sintered product, the oxidizing gas can readily penetrate deep into the surface of sintered product to facilitate the oxidization of the product surface into the alumina scale, in addition to that the oxidization depth can be controlled such as by the density of the product, which makes it possible to readily control the thickness of the alumina scale.

Abstract: The present invention relates to a method of producing a mold material used for obtaining a mold for casting metals such as Zn, Al and the like or molding resins. In the method, the short fibers having an aspect ratio of 30 to 300 and obtained by cutting ferritic stainless steel long fibers having a width of 100 .mu.m or less, ferritic stainless steel powder and at least one of Cu powder and Cu alloy powder are used as raw materials. The raw materials are blended to obtain a material mixture which is then compressed under pressure in a Cold Isostatic Press process. The thus obtained compressed product is sintered in a vacuum atmosphere. The sintered material is held in an atmosphere of nitrogen gas or decomposed ammonia gas so that 0.3 to 1.2 wt % of nitrogen is added to the stainless steel in the sintered material. The thus obtained mold material has a hardness of HMV 250 to 500.

Abstract: A consolidated tungsten alloy body consisting essentially of from about 88% to about 98% by weight of tungsten, balance, nickel and iron, produced by liquid phase sintering, containing a continuous phase of a tungsten, nickel and iron alloy and a discontinuous phase of elongated grains of tungsten having an aspect ratio of at least 4:1 relatively uniformly distributed throughout the continuous phase and wherein said body has a recrystallization temperature of from about 1000.degree. C. to about 1200.degree. C. A process for producing the consolidated bodies comprises working and annealing at controlled temperatures to achieve the desired properties. The working temperatures are from about 700.degree. C. to about 900.degree. C. and the annealing temperature is preferably 1200.degree. C.

Abstract: In a method of manufacturing a sintered ceramic material using the heat generated in a thermit reaction as a heating source, a pre-heating is applied preceding to the sintering step or a mixture comprising: (A) at least one ceramic powder, (B) at least one non-metallic powder selected from the group consisting of carbon, boron and silicon, and (C) a metal powder and/or a non-metallic powder other than the above-mentioned (B) is used. Homogeneous and dense sintered ceramic material or sintered composite ceramic material can be obtained by this method, and the fine texture thereof, and the phase constitution, the phase distribution and the like of the composite ceramic phase can be controlled sufficiently.

Abstract: Extra loss is introduced in coupled cavity and klystron RF circuits by applying a surface coating to selected parts of circuit elements used in the circuits. The coating is applied in the form of a slurry, which is then sintered. The slurry comprises a mixture of an iron-base powder (such as a stainless steel) and a dielectric glass ceramic, suspended in a binder dissolved in a solvent. Circuits with the loss coating are easier to match than by other prior art techniques. The loss coating of the invention reduces the fabrication cost of coupled-cavity traveling wave tubes, while improving the performance by minimizing the gain ripple. Higher average power operation is possible, due to elimination of loss buttons previously employed in the prior art.

Abstract: A method and apparatus are disclosed for fabrication of hollow articles by hot consolidation of metal alloy powder between a hollow core and a fluid pressure resistant outer shell. The hollow core is formed, a disposable layer is applied to define the object contour, a fluid pressure resistant metallic layer is formed over the disposable layer, which is then melted, removed and replaced by the metal alloy powder, and this assembly is hot isostatically pressed. The powder and core materials are preferably selected to be metallurgically compatible, so the core becomes an integral part of the finished article. The hollow article is inflated in a form die to establish the finished article contour.

Abstract: A method for manufacturing a brake fitting comprising a plurality of studs each surrounded by a less fragile belt, the studs being non-contiguously secured to a metal support. According to the method, the support is provided with a slip-resistant surface by coating with a braze welding suspension which is oxidized and reduced. Stud blanks then are molded and compacted from powdered friction products and belt blanks are molded and compacted from metal powders and given an internal diameter 1.005 to 1.05 times the external diameter of the stud blanks, and the belt blanks are disposed around the stud blanks and sintered, obtaining sheathed stud blanks which are placed on the slip resistant surface of the support, and welded thereto by heat treatment. Finally, the sheathed stud blanks are forged at over 400 degree C., shortening them by at least 15%.

Abstract: A process for producing high-strength, substantially nonporous alloys by means of a three-component mixture, including admixing a first component of one or more low-melting temperature metals or alloys thereof, a second component of one or more high-melting temperature metals or alloys thereof, and a substantially inert third component of one or more refractory compounds, subjecting the mixture to changes in temperature so as to form a mixture capable of being shaped at a temperature well below the melting or decomposition temperature of the highest melting metal and the inert refractory compound.

Abstract: A blade member for cutting-tools includes a cermet substrate which contains, apart from unavoidable impurities, a binder phase and a hard dispersed phase. The binder phase contains 5% to 30% by weight of cobalt and/or nickel. The hard dispersed phase contains a balance composite carbonitride of titanium and one or more of the elements tungsten, molybdenum, tantalum, niobium, hafnium and zirconium. The composite carbo-nitride satisfies the relationship 0.2.ltoreq.b/(a+b).ltoreq.0.7, where a and b denote atomic ratios of carbon and nitrogen, respectively. The substrate includes a hard surface layer in which the maximum hardness is present at a depth between 5 .mu.m and 50 .mu.m from a substrate surface thereof. The substrate surface has a hardness of 20% to 90% of the maximum hardness.

Abstract: It is provided a method for the manufacture of a corrosion-resistant sintered alloy steel, which comprises providing a stainless steel powder; adding a binder to said steel powder; molding the mixture; and carrying out the steps of (1) heating the resultant molding to remove the binder therefrom, (2) sintering the thus debound molding under reduced pressure up to 30 Torr, and (3) further sintering at a higher temperature than those of steps (1) and (2) in a non-oxidative atmosphere under substantially atmospheric pressure. It is also provided a corrosion-resistant sintered alloy steel which comprises a stainless steel, said alloy steel having a density ratio of not less than 92%, a maximum diametric of pore present in the structure of not larger than 20 .mu.m, and a content of Cr at the surface of the steel as being sintered which is not less than 80% of a content of Cr in the inside thereof.

Abstract: The invention relates to a method for the treatment and production of material, particularly for the treatment and production of free flowing, finely divided metal powder or metal matrix composite powder. The material is composed of tungsten carbide and at least two components, nickel and cobalt. According to the method of the invention the composite powder is first mixed with the organic binder in order to form powder agglomerate, which powder agglomerate is further subjected to sintering treatment in order to remove the binder and to improve the mechanical strength of the composite powder. Further the composite powder is subjected to classification and the classified composite powder is thermally treated at a high temperature in an at least one-step thermal treatment in order to melt the composite powder at least partially, and in order to mix the various components to each other.

Abstract: Disclosed herein is an economical process for the production of a sintered Fe-Co type, Fe-Co-V type or Fe-Co-Cr type magnetic material, which comprises preparing an alloy powder of at least Fe and Co metals of a like powder, kneading it with an organic binder, conducting injection molding and debinding, and then conducting a two-stage sintering treatment consisting of low-temperature sintering and high-temperature sintering. Magnetic materials having a specific composition of the Fe-Co, Fe-Co-V or Fe-Co-Cr type and excellent magnetic properties and a low core loss value are also disclosed.

Abstract: A powder metallurgy process for producing near-net shape, near-theoretical density structures of multiphase nickel, aluminum and/or titanium intermetallic alloys is provided by employing pressureless sintering techniques. The process consists of blending a brittle aluminide master alloy powder with ductile nickel powder, so as to achieve the desired composition. Then, after cold compaction of the powdered mixture, the compact is liquid phase sintered. The four step liquid phase sintering process is intended to ensure maximum degassing, eliminate surface nickel oxide, homogenize the alloy, and complete densification of the alloy by liquid phase sintering.

Abstract: Methods for preparing sintered components from iron-containing and alloy steel powder are provided. The methods includes compacting a powder mixture in a die set at a pressure of at least about 25 tsi to produce a green compact which is then presintered at a temperature of about 1100.degree.-1600.degree. F. (593.degree.-870.degree. C.) for at least about 5 minutes to produce a presintered preform. The presintered preform is then compacted at a pressure of at least about 25 tsi to produce a double-pressed presintered preform, which is, in turn, sintered at a temperature of at least about 1000.degree. C. for at least about 5 minutes to produce a sintered component having improved transverse rupture strength and a higher density.

Abstract: A sintered metallic light-weight structural material consists of spherical voids and lattice-type webs of intermetallic compounds. Owing to its weight-specific strength, which is superior to that of conventional super-alloys, this material is suited especially for application in aircraft and turbine engine construction.

Abstract: A magnesium base metal component is forged from a billet by subjecting the billet to a forging process using multiple steps in a closed-die or an open-die forging and a forging temperature ranging from 200.degree. C. to 300.degree. C. The billet is compacted from a rapidly solidified magnesium based alloy defined by the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, and yttrium, "a" ranges from about 0 to 15 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. The alloy has a uniform microstructure comprised of a fine grain size ranging from 0.2-1.0 .mu.m together with precipitates of magnesium and aluminum containing intermetallic phases of a size less than 0.1 .mu.m.

Abstract: Thermoelectric elements with excellent thermoelectric characteristics such as Seebeck coefficient thermoelectromotive force and thermal conductivity can be produced by molding a powder of metal or metal alloy as the raw material and then sintering; by using as such raw material, ultra fine powders containing Fe and Si as main components and having a mean particle diameter of 50 to 5,000.ANG..

Abstract: A method of preparing a compound pipe, the wall of which comprises an inner layer of a first material and an outer layer of a second material. Powders of the two materials are isostatically hot pressed to form a cylindrical tubular blank in which the first material forms an inner layer and the second material forms an outer layer, the blank after heating to a suitable temperature being extruded over a mandrel.

Abstract: A process is provided for the production of a sintered body. The process includes the following consecutive steps: i) mixing and kneading one or more metal powders and/or one or more alloy powder with a binder into a compound, said metal and alloy powders having an average particle size not greater than 30 .mu.m, ii) injection-molding the compound into a green body; iii) debinding the green body to form a debound body; and iv) subjecting the debound body to a first-stage sintering at 1,050.degree.-1,250.degree. C. in a reduced-pressure atmosphere and then to second-stage sintering at a temperature in a range of 1,100.degree.-400.degree. C. which is higher than that of the first-stage sintering. This process can provide sintered Ti bodies and sintered magnetic bodies of the Fe-Si type, which have a density ratio of at least 95%.

Abstract: A method for producing a camshaft having a tubular steel shaft and a sintered cam piece joined to the shaft. The sintered cam piece has iron tetroxide film at its surface. The camshaft is produced by assembling a powder compact to the steel shaft to provide a camshaft assembly, sintering the assembly to provide an integral assembly, correcting bending to the assembly, annealing the assembly, grinding the cam piece and effecting vaporization treatment to the assembly at a temperature lower than the annealing temperature.

Abstract: Disclosed herein is an economical process for the production of a sintered Fe-Co type, Fe-Co-V type or Fe-Co-Cr type magnetic material, which comprises preparing an alloy powder of at least Fe and Co metals or a like powder, kneading it with an organic binder, conducting injection molding and debinding, and then conducting a two-stage sintering treatment consisting of low-temperature sintering and high-temperature sintering. Magnetic materials having a specific composition of the Fe-Co, Fe-Co-V or Fe-Co-Cr type and excellent magnetic properties and a low core loss value are also disclosed.

Abstract: A method of manufacturing a sintered machine part, by which the machine part can be manufactured to be sufficiently strong, wear and abrasion resistive, and durable against the fatigue caused by recursive impacts, without the heat treatments. In the method, a machine part composed of 0.1 to 0.8% of carbon by weight, 2 to 6% of nickel by weight, 0.6 to 1.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron is manufactured by mixing partially diffused alloy powder composed of 2 to 6% of nickel by weight, 0.4 to 0.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron with graphite powder amounting to 0.1 to 0.8% by weight and molybdenum simple powder having 2 to 7 .mu.m mean particle size amounting to 0.2 to 1% by weight, and then by compacting the mixed powder and sintering the compact.

Abstract: The invention provides a process for production of silver-containing precursor alloys to oxide superconductors, said alloys having reduced amounts of intermetallics. Powders containing metallic elemental components of an oxide superconductor are high energy milled for a predetermined amount of time to increase homogeneity of the mixed metallic elemental components of the oxide superconductor. Silver is then high energy milled into the metallic components. The mixed silver and metallic elemental components of the oxide superconductor are compacted for the silver-containing superconductor precursor. The compacted powder is preferably hot worked at a temperature of at least 50% of the precursor alloy's melting temperature in degrees Kelvin.

Abstract: A composition containing 30 to 70% chromium carbide, 5 to 20% soft noble metal, 5 to 20% metal fluorides, and 20 to 60% metal binder is used in a powdered metallurgy process for the production of self-lubricating components, such as bearings. The use of the material allows the self-lubricating bearing to maintain its low friction properties over an extended range of operating temperatures.

Abstract: Shaped parts are formed from a powder having the desired chemistry of the finished part by mixing the powder with a thermosetting condensation resin that acts as a binder. The resin may be partially catalyzed, or additives or surfactants added to improve rheology, mixing properties, or processing time. Upon heating, the inherently low viscosity mixture will solidify without pressure being applied to it. A rigid form is produced which is capable of being ejected from a mold. Pre-sintered shapes or parts are made by injection molding, by using semi-permanent tooling, or by prototyping. Binder removal is accomplished by thermal means and without a separate debinding step, despite the known heat resistance of thermosetting resins. Removal is due to the film forming characteristic of the binder leaving open the part's pores, by providing oxidizing conditions within the part's pores as the part is heated, and by insuring that the evolving resin vapor diffuses through the pores by heating the part in a vacuum.

Abstract: A composition for producing a metallic sintered body consisting essentially of a mixture of a powdered metal having an average particle size of not more than 50 microns with a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 is disclosed.The composition has excellent properties such as mechanical strength of a green body thereof, and only a short time being necessary for removal or elimination of binder in comparison with conventional sintering compositions.Furthermore, the binder in the present composition is substantially composed of a single component; accordingly, manufacturing process control can be simplified by use of the lactone resin.Furthermore, a method for producing a metallic sintered body using such composition is also disclosed.

Abstract: A method of manufacturing a sintering product of Fe-Co alloy soft magnetic material by molding a powder comprising from 40 to 60% by weight of Co and the substantial balance of Fe, sintering the molding product and then applying heat treatment, wherein cooling after the heat treatment is conducted as slow cooling at a cooling rate of not more than 50.degree. C./min.

Abstract: A process for making molded objects utilizes powder injection molding techniques. Powder is mixed with a binder and then cast into a compact. The compact is then subjected to a first debinding step in the presence of a wicking agent under gentle heating. In this first stage, at least 40% of the binder is removed. Additional binder is then removed in a subsequent higher temperature stage to produce a compact which is free of binder and free of cracks.

Abstract: In the method of invention, the formability is imparted to the slurry of a metal or ceramic powder by employing a porous mold and removing the dispersion medium through the evaporation or thermal decomposition thereof, or by using a silazane oil as the dispersion medium and curing it by heating. Since the phase change usually accompanying volume change does not occur in the dispersion medium, strain and deformation rarely occur in the molded body. As result, the sintered body obtained has high dimensional accuracy.

Abstract: A method for manufacturing ceramic/metal or ceramic/ceramic composite articles is disclosed. The articles can be useful for the production of aluminum in fused salt electrolysis cells, as armor plates for the protection against projectiles, cutting tools, or in abrasion resistance applications. The temperature slope of the process if optimized such that one of the reactants in the manufacturing proceeds through peritectic decomposition at a heating rate of low temperature increase for desirably uniform temperature distribution over the reaction mixture. Then the temperature increase is greatly elevated to obtain a reaction sintering condition for avoiding grain growth of undesired reaction products. Elevated temperature reaction sintering conditions can be maintained to decompose undesired components before they are entrapped by the reaction product.

Abstract: The invention provides a method of manufacturing a thin metallic body composite structure. First, an inner layer of a first metal is cleaned to remove oxides and promote metallurgical bonding. The inner layer has a plurality of penetrating holes piercing the thickness of the inner layer. The penetrating holes are filled with metal powder of a second metal. Two outer layers of the second metal are placed on opposite sides of the cleaned and filled inner layer to form a sandwich structure. The sandwich structure is heated to a temperature at which recrystallization will occur in a non-oxidizing atmosphere. The sandwich structure is then hot worked to reduce thickness of the sandwich structure forming the thin metallic body composite structure.