Abstract: The present invention relates to a powder of unagglomerated metallic particles. More particularly, the present invention relates to a powder of unagglomerated metallic particles having an average diameter of about 1-100 nm and the process for making the same. Additionally, the powder of unagglomerated metallic particles can be formed into a lyophilized form which upon reconstitution maintains the average diameter of between about 1-100 nm wherein the particles remain unagglomerated.

Abstract: A metal powder injection moldable composition which hardly causes debinding deformation is obtained. This composition consists of a metal powder and an organic binder. The components which constitute the organic binder are:a. polyoxymethylene having a Vicat softening temperature A.gtoreq.150.degree. C.,b. polypropylene having a Vicat softening temperature B.gtoreq.130.degree. C.,c. an organic compound whose viscosity at said Vicat softening temperature A (.degree. C.) is not more than 200 mPa.multidot.s, andd. a thermoplastic resin whose Vicat softening temperature is not higher than said B (.degree. C.).

Abstract: Metallurgical powder compositions are provided that contain a metal powder that is associated with a polymeric material in admixture with a solid, particulate polyether lubricant. The incorporation of the polyether lubricant enhances the green strength properties of compacted parts made from the powder compositions, and generally reduces the ejection forces required to remove the compacted part from the die cavity.

Abstract: An Al-base alloy prepared by hot-working a mixture of an Al alloy powder and dan Ni powder to join the powders and having a structure wherein Ni--Al intermetallic compounds are dispersed. The powder mixture can be hot-worked in the solid-phase temperature range, liquid phase temperature range or solid-liquid phase mixture temperature range of the Al alloy. A dispersion strengthening powder can be further admixed with the mixture of Al alloy powder and Ni powder.

Abstract: A transition metal carbide-Group VIII metal powder comprising discrete particles of a transition metal carbide and Group VIII metal wherein: substantially all of the particles have a size of at most 0.4 micrometer; the transition metal carbide is selected from carbides of the group consisting of tungsten, titanium, tantalum, molybdenum, zirconium, hafnium, vanadium, niobium, chromium, mixtures and solid solutions thereof; and the Group VIII metal is selected from the group consisting of iron, cobalt, nickel, mixtures and solid solutions thereof. Said powders are produced by heating an admixture comprising a finishing source of carbon (e.g., acetylene black), a source of a group VIII metal (e.g., Co.sub.3 O.sub.

Abstract: A composition comprising a mixture of coarse and fine iron powder and at least one densification enhancing additive for economically producing metal injection molding components.

Abstract: A feeder of a solid organometallic compound is obtained by filling a container up to 50-80 vol % of the total capacity of the container with stainless steel support whose pore ratio is adjusted to 50-80 vol % and then also filling it with solid granules of an organometallic compound which is solid at room temperature.

Abstract: An iron-based powder composition for powder metallurgy excellent in flowability and compactibility is produced in accordance with a method comprising the steps of: adding to iron-based and alloying powders, for a primary mixing, a surface treatment agent, and in addition, for a secondary mixing, a fatty acid amide and at least one lubricant, wherein the lubricant has a melting point higher than that of the fatty acid amide and can be a thermoplastic resin, a thermoplastic elastomer, and inorganic or organic compounds having a layered crystal structure; heating and stirring up a mixture after the secondary mixing at a temperature above a melting point of the fatty acid amide to melt the fatty acid amide; cooling, while mixing, the mixture subjected to the heating and stirring process so that the alloying powder and a lubricant having a melting point higher than the fatty acid amide adhere to a surface of the iron base powder subjected to the surface treatment by an adhesive force of the melt; and adding at the

Abstract: Methods for the manufacture of nanostructured metals, metal carbides, and metal alloys are presented, such metals including nanostructured aluminum, chromium, iron, molybdenum, vanadium, and steel. Preferably, the nanostructured steel is of the M50 type, and comprises iron, molybdenum, chromium, vanadium and carbon. Synthesis of M50 steel further comprising nanostructured aluminum, aluminum oxide, or aluminum nitride is also described. In accordance with an important feature of this invention, the grain size of the metals and metal alloys is in the nanometer range. In accordance with the method of the present invention, the nanostructured metals, metal carbides, and metal alloys are prepared via chemical synthesis from aluminum, iron, molybdenum, chromium and vanadium starting materials. Decomposition of metal precursors or co-precipitation or precipitation of metal precursors is followed by consolidation of the resulting nanostructured powders.

Abstract: Complexable polymeric binder-lubricant blends are disclosed for production by powder metallurgy techniques of ferrous compositions with remarkably high green strength upon compaction, or soft magnetic ferrous powder/resin composites with improved processability and magnetic properties. An exemplary composition consists of a ferrous powder, a thermoset phenolic resin and poly(ethylene oxide), both polymers exhibiting, when intimately mixed, strong intermolecular acid-base interactions giving rise to an interpolymer complex which imparts a high strength to the resulting ferrous powder compact.

Abstract: An iron-based powder mixture for powder metallurgy, comprising: an iron-based powder, and from 0.05 to 0.50% by weight of a thermoplastic resin powder which comprises 50% or more by weight of units of at least one monomer selected from the group consisting of acrylic esters, methacrylic esters, and aromatic vinyl compounds, and whose average primary particle size is from 0.03 to 5 .mu.m, whose average agglomeration particle size is from 5 to 50 .mu.m, and whose average molecular weight measured by the specific viscosity of a solution is from 30000 to 5000000.

Abstract: Thermally sprayable powders for the formation of abradable seals and abradable seals formed by thermally spraying the powders include an alloyed metal phase material and a solid lubricant ceramic phase material. The alloyed metal phase material includes a major amount of a matrix metal which can be one or more of Ag or Cu, at least one melting point depressing metal which can be one or more of Si, B, Mn, or Al, and at least one oxidation resistant metal which can be one or more of Al, Cr, or Si. The solid lubricant ceramic phase is preferably hexagonal boron nitride, molybdenum sulphide, graphite, talc, bentonite or mica. Abradable seals formed by thermally spraying the powders are suitable for use with Ti alloy blades at temperatures up to 700.degree. C.

Abstract: A sintered friction material includes a copper alloy base and hard particles. The copper alloy base includes copper and at least one of, and preferably both, Zn and Ni within a total range of 5 to 40 wt % of the copper alloy base. The hard particles are uniformly dispersed in a matrix formed by the original composite copper alloy powder constituting the base, in a content amount j within a range of 10 to 30 wt % of the friction material.

Abstract: A brazing material having 0.25-0.9 wt % of titanium oxide added to a basic formula consisting of 60-94.25 wt % Ag, 5-30 wt % Cu and 0.5-4.5 wt % of an active metal is processed to form a paste, which is applied to an AlN substrate and overlaid with a copper plate and heat treated to form a joint between the AlN substrate and the copper plate. A resist is applied to the copper plate to form a circuit pattern, which is etched to form a metallized circuit, thereby producing a metal-ceramics composite substrate capable of operation on high electrical power. The substrate is improved in various characteristics of a power module device over the composite substrates produced by using the conventional brazing materials.

Abstract: Aluminum powder compositions intended for powder metallurgy applications are provided. The powder compositions contain aluminum and aluminum alloys or blends made from elemental powders, admixed with a polyethylene lubricant. The polyethylene admixture eases the compaction of powders and the ejection of parts. As compared to other conventional admixed lubricants used for Al powder metallurgy applications, polyethylene allows to obtain parts with higher green and sintered strengths. Proper delubrication prior to sintering is of importance.

Abstract: A piezoelectric material includes a PZT ceramic, and a noble metal component. The noble metal component is added to the PZT ceramic in an amount of 0.35 parts by volume or more with respect to 100 parts by volume of the PZT ceramic, and is at least one element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt and Au, or is an alloy of silver (Ag) and the noble metal element. A piezoelectric element includes a pair of external electrodes, at least a pair of piezoelectric layers, and a conductive layer. The piezoelectric layers are formed of the PZT ceramic, and are disposed between the external electrodes. The conductive layer is formed of the noble metal component, and is insulated from the external electrodes. The piezoelectric layers and the conductive layer are formed lamellarly, and are laminated alternately in a direction connecting the external electrodes.

Abstract: A blend of pre-alloyed stainless steel powder for use in producing sintered stainless steel, said powder consisting essentially of, by weight, up to 0.05% carbon, 22% to 26% chromium, 10% to 24% nickel, 2.7% to 5% molybdenum, 0.1% to 1% boron, up to 2.0% manganese, up to 2.0% silicon, balance iron and residuals, together with manganese sulfide particles added thereto until they comprise up to 4%, by weight, of the overall blend, experimental results having shown that the blend offers significant improvements in the machinability of the resulting steel. The patent also claims a method for making sintered steel using the blend, as well as the sintered steel resulting from the process.

Abstract: A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase material. These components are combined to form a solid compacted mass with the material disposed in the polycrystalline high temperature superconductor. This combined mixture is rapidly heated, forming a dispersion of nanophase size particles without a eutectic reaction. These nanophase particles can have a flat plate or columnar type morphology.

Abstract: A pressable powder is formed by a method comprising mixing, in essentially deoxygenated water, a first powder selected from the group consisting of a transition metal carbide and transition metal with an additional component selected from the group consisting of (i) a second powder comprised of a transition metal carbide, transition metal or mixture thereof; (ii) an organic binder and (iii) combination thereof and drying the mixed mixture to form the pressable powder, wherein the second powder is chemically different than the first powder. The pressable powder may then be formed into a shaped part and subsequently densified into a densified part, such as a cemented tungsten carbide.

Abstract: A gamma titanium aluminide substrate is hardfaced by providing a hardfacing material with a titanium-aluminum, gamma-titanium aluminide alloy component having a composition of titanium and about 42 to about 49 atomic percent aluminum, and a nonmetallic powder, such as titanium diboride. This hardfacing material is preferably furnished as a hardfacing alloy source in the form of a hollow tube of metallic titanium tube material, and a filler powder within the hollow tube. The filler powder is a filler mixture of an aluminum-containing alloy powder comprising more than about 50 atomic percent aluminum, and the nonmetallic powder. The relative proportions of the titanium tube material and the aluminum-containing alloy powder are such that their net composition is a gamma phase titanium aluminide composition. The hardfacing material is applied to the substrate, as by a welding process.

Abstract: Austenitic stainless steels and nickel-base alloys containing, by wt. %, 0.1 to 3.0% V, 0.01 to 0.08% C, 0.01 to 0.5% N, 0.05% max. each of Al and Ti, and 0.005 to 0.10% O, are strengthened and ductility retained by atomization of a metal melt under cover of an inert gas with added oxygen to form approximately 8 nanometer-size hollow oxides within the alloy grains and, when the alloy is aged, strengthened by precipitation of carbides and nitrides nucleated by the hollow oxides. Added strengthening is achieved by nitrogen solid solution strengthening and by the effect of solid oxides precipitated along and pinning grain boundaries to provide temperature-stabilization and refinement of the alloy grains.

Abstract: The invention relates to an aluminum powder blend and sintered components produced from the aluminum powder blend. The powder is based on the precipitation hardenable 7000 series Al-Zn-Mg-Cu alloys with trace addition of lead or tin. The powder blend comprises 2-12 wt. % zinc, 1-5 wt. % magnesium, 0.1-5.6 wt. % copper, 0.01-0.3 wt. % lead or tin, and the balance aluminum. The invention also provides a composite powder comprising the foregoing powder blend and a reinforcing element or compound.

Abstract: An oil additive for repairing abrasions and lubricating engine bearing surfaces is provided. A mixture of granular granulated alloy material and granular polytetrafluoroethylene (PTFE) are added to the engine or engine oil, with normal engine operations peening and burnishing the granulated metal alloy material granules to the surfaces to thereby form a matrix which entraps the PTFE granules. Continued operation of the engine gradually wears away particles of the matrix to uncover the embedded PTFE granules for slow release of granules. In one embodiment, about 1% to 2% by composition of the mixture is granules of titanium dioxide for preparing the bearing surfaces and enhancing additive performance. The granules of the mixture are micron to submicron in size and can adhere readily to surface abrasions and smooth surfaces.

Abstract: Fine powders of iron with less than 5% by weight graphite, copper, and an organic binder can be formed into shapes having a green density of up to about 7.4 g/cc and sintered in a hydrogen containing atmosphere to yield parts having minimum variations in physical properties. Incorporation of small quantities of copper, e.g. 1% or less by weight, negates variations in physical properties of sintered parts that were subjected to variations in the hydrogen content of the sintering atmosphere.

Abstract: A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a melting point of the aluminum product or less while keeping the aforementioned contact. The nitriding agent includes an aluminum powder, and the ambient gas virtually includes a nitrogen gas. The resulting nitriding layer has a depth of 5 micrometers or more, and it exhibits a case hardness of from 250 to 1,200 mHv. Thus, it is possible to form the deep and hard nitriding layer on the aluminum product with ease under the conditions where it has been said to be too difficult to nitride aluminum products. The case nitrided aluminum product can appropriately make sliding parts which require high wear resistance.

Abstract: The present invention relates to a powder of unagglomerated metallic particles. More particularly, the present invention relates to a powder of unagglomerated metallic particles having an average diameter of about 1-100 nm and the process for making the same. Additionally, the powder of unagglomerated metallic particles can be formed into a lyophilized form which upon reconstitution maintains the average diameter of between about 1-100 nm wherein the particles remain unagglomerated.

Abstract: Articles produced by a powder metallurgy process involving forming of a shape by compaction followed by sintering without the application of external pressure from a stainless steel alloy powder produced by rapid atomization followed by an annealing treatment, which powder consists essentially of in weight percent, chromium 14-30, molybdenum 1 to 5, vanadium 0 to 5, tungsten 0 to 6, silicon 0 to 1.

Abstract: A magnetic-abrasive powder includes a magnetic component of a powder of a magnetic material, an abrasive component of a powder of an abrasive material, and an adhesive which adhesively connects particles of the magnetic material with particles of the abrasive material.

Abstract: Electrical contact material made from intimate mixtures of silver powder and a powder of a second phase material is shown in which the powder of the second phase material is milled to produce a selected grain distribution of approximately 90% less than 7-10 microns, approximately 50% between 2 and 5 microns and approximately 10% less than 0.8 to 1.0 microns. The powder of the second phase material is added to a silver salt solution, ammonium hydroxide and hydrazine hydrate to form a precipitate of second phase material particles covered with silver. For applications in which the particles need to be free flowing the particles are compacted together without any binder, broken into chunks and milled to provide granules. In one embodiment homogeneously doped tin oxide particles are disclosed in which tin oxide and the oxide of the dopant are dissolved in nitric acid to produce finely dispersed tin oxide and dopant oxide. The oxides are calcined and ground to the selected grain size distribution.

Abstract: A mixed metal powder for hard metal alloys comprising cobalt, 1 to 10 parts per weight tungsten and 1 to 10 parts by weight of aluminum and a hard metal alloy containing the mixed metal powder binder in an amount of from 2 to 12 parts by weight per about 100 parts by weight of a metal carbide for corrosion resistant hard metal tools.

Abstract: A low melting point alloy is used to sinter metal carbide particles. The alloy is a eutectic-like alloy formed from a binding metal such as iron, cobalt or nickel, in combination with vanadium and chromium. The alloy is preferably formed by forming two separate alloys and blending these together. The first alloy is formed by spray drying together a solution of a binding metal salt such as a cobalt salt with a solution of a chromium salt. The formed particles are then carburized to form a cobalt-chromium-carbon alloy. A separate vanadium alloy is formed in the same manner. The two are combined to establish the amount of chromium and vanadium desired, and this, in turn, is used to sinter metal carbide parts. This permits sintering of the metal carbide parts at temperatures less than 1250.degree. C. and in turn significantly inhibits grain grown without a significant decrease in toughness. It is particularly adapted to form carbide products wherein the carbide grain size is as low as 120 nanometers.

Abstract: Silver-iron materials for electrical switching contacts with properties which come very close to those of silver-nickel materials formed of 0.5 to 4.5% by weight iron and 0.05 to 2% by weight of one or more of the oxides magnesium oxide, calcium oxide, yttrium oxide, lanthanum oxide, titanium oxide, zirconium oxide, hafnium oxide, cerium oxide, niobium oxide, tantalum oxide, chromium oxide, manganese oxide, iron oxide, zinc oxide, aluminum oxide, indium oxide, silicon oxide, and tin oxide, the balance being silver.

Abstract: This invention relates to a method or process of forming a sintered article of powder metal, and particularly relates to a process of forming a sintered article of powder metal by blending combinations of finely ground ferro alloys (either singly or in combination with other ferro alloys) with elemental iron powder and other additives and then high temperature sintering of the article in a reducing atmosphere to produce sintered parts with oxygen contents less than 250 parts per million (ppm). More particularly the ferro alloys admixed to the base iron have a mean particle size of approximately 8 to 12 microns, having previously been ground to size in an inert atmosphere.

Abstract: A hot-worked, fully dense, wear resistant, vanadium-rich, powder metallurgy cold work tool steel article having improved impact toughness. This is achieved by controlling the amount, composition and size of the primary carbides and by insuring that substantially all the primary carbides remaining after hardening and tempering are MC-type vanadium-rich carbides. The article is produced by hot isostatic compacting of nitrogen atomized powder particles.

Abstract: The present invention is a brazing composition for brazing a tube made of aluminum or aluminum alloy and a fin made of aluminum or aluminum alloy when manufacturing a heat exchanger such as evaporators, condensers, radiators, etc., comprising a powder of Al-Si-Zn alloy and binder, wherein the content of Zn in the powder of Al-Si-Zn alloy is in a range of 10 to 55 wt %.

Abstract: Silver-iron materials for electrical switching contacts with properties which come very close to those of silver-nickel materials formed of 4.6 to 15% by weight iron and 0.05 to 5% by weight of one or more of the oxides magnesium oxide, calcium oxide, yttrium oxide, lanthanum oxide, cerium oxide, chromium oxide, iron oxide, aluminum oxide, indium oxide, silicon oxide, and tin oxide, the balance being silver.

Abstract: The present invention provides for iron-based metallurgical powder compositions that contain nanoparticle metal or metal oxide flow agents useful for enhancing the flow characteristics of the compositions, particularly at elevated processing temperatures. The iron-based powder compositions can be advantageously blended with a flow agent such as a silicon oxide or iron oxide, or a combination of both, to provide a powder composition having improved flow properties and ejection release characteristics.

Abstract: A metallurgical silicon or ferrosilicon in the form of granulates having an average size of less than 10 mm and in which the total oxygen concentration is less than 0.05% by weight, and a process for manufacture of this silicon or ferrosilicon consisting of a carbothermal reduction of silica in an electric oven, chlorine-based refining of the liquid metal, and granulation of the refined liquid metal in water under an inert atmosphere. The silicon may be used for silicone manufacture or as a constituent of an aluminum alloy, and the ferrosilicon, as a steel additive used to obtain magnetic sheet metals for electrical construction.

Abstract: A conducting thick film composition, a thick film electrode made by sintering this composition, and a ceramic electronic component and a laminated ceramic capacitor in which this thick film electrode is used of which the electrical reliability are improved by the strength of the bond between the ceramic substrate and a thick film electrode being increased by the elimination of blistering and cracking of the electrode during sintering of the composition and the adherence of solder to the electrode being improved by the elimination of glass separation out onto the surface of the electrode during sintering. The conducting thick film composition comprises Cu powder, glass powder and an organic vehicle, the Cu powder comprises spherical powder and scaly powder and the glass powder comprises borosilicate zinc glass and borosilicate barium glass.

Abstract: Fine powders of iron with less than 5% by weight graphite, copper, and an organic binder can be formed into shapes having a green density of up to about 7.4 g/cc and sintered in a hydrogen containing atmosphere to yield parts having minimum variations in physical properties. Incorporation of small quantities of copper, e.g. 1% or less by weight, negates variations in physical properties of sintered parts that were subjected to variations in the hydrogen content of the sintering atmosphere.

Abstract: An iron-base mixture and method for powder metallurgy containing iron-base powder, an alloy powder including at least copper, copper oxide or both, and an organic substance for bonding the alloy powder to the iron-base powder, wherein said copper powder or copper oxide powder has a particle size of agglomeration, when evaluated by the micro-track method, of about 5 .mu.m to 28 .mu.m, and wherein the particles of copper or copper oxide have a primary particle size which, when evaluated by the BET method, is about 0.2 .mu.m to 1.5 .mu.m.

Abstract: This invention presents, inter alia, novel iron-based powder compositions and compacted articles made from the same. The novel iron-based powder compositions of the invention are formulated with a fluoric resin, such as polytetrafluoroethylene, which provides powder mixtures with good flow properties and good uniformity. Compacted articles made from the novel iron-based powder compositions of the invention show reduced core losses and have good magnetic permeability over an extended frequency range. These compacted articles also exhibit high green density and good ejection characteristics.

Abstract: The present invention provides a ceramic based composite powder and a method for applying the composite powder using a H.V.O.F. gun to form a self-lubricating coating for metal parts. The composite powder and coating are comprised of a ceramic powder, a metal powder, and a solid lubricant powder.

Abstract: A lubricant for metallurgical powder compositions contains an oligomer of amide type, which has a weight-average molecular weight M.sub.w of 30,000 at the most. A metal-powder composition containing the lubricant, as well as a method for making sintered products by using the lubricant, are also disclosed. Further, the use of the lubricant in warm compaction is described.

Abstract: An iron-based powder for producing impact-resistant components by powder compacting and sintering contains, in addition to Fe, 0.3-0.7% by weight of P, 0.3-3.5% by weight of Mo, and not more than 2% by weight of other alloying elements. A method of powder-metallurgically producing impact-resistant steel components comprises using an iron-based powder which, in addition to Fe, contains 0.3-0.7% by weight of P, preferably 0.35-0.65% by weight of P, 0.3-3.5% by weight of Mo, preferably 0.5-2.5% by weight of Mo, and not more than 2% by weight, preferably not more than 1% by weight, of other alloying elements; compacting the powder into the desired shape; and sintering the compact.

Abstract: Silver-iron materials for electrical switching contacts with properties which come very close to those of silver-nickel materials formed of 0.5 to 20% by weight iron 0.5 to 5% by one or more of the elements rhenium, iridium, and ruthenium, and 0.05 to 2% by weight of one or more of the oxides magnesium oxide, calcium oxide, yttrium oxide, lanthanum oxide, titanium oxide, zirconium oxide, hafnium oxide, cerium oxide, niobium oxide, tantalum oxide, chromium oxide, manganese oxide, iron oxide, zinc oxide, copper oxide, aluminum oxide, indium oxide, silicon oxide, and tin oxide, the balance being silver.

Abstract: An improved hard facing for teeth and other surfaces of milled tooth rock bits comprises steel in the range of from 18 to 32 percent by weight, and filler in the range of from 68 to 82 percent by weight. The filler is cemented tungsten carbide and cast tungsten carbide free, and includes greater than 95 percent by weight single crystal monotungsten carbide particles. The single crystal monotungsten carbide particles have a particle size in the range of from 200 to 500 mesh and, preferably in the range of from 200 to 325.

Abstract: The disclosure relates broadly to a new class or type of electroconductive powders (ECP), designated as Polytype ECP (PECP), comprising intimate mixtures of several types of ECP powders. PECP mixtures possess a lower electrical resistivity, or a higher electroconductivity, than would be expected from the weighted average of the component ECP powders. PECP are multi-component and may contain many different types of ECP. ECP components of the PECP can be selected from at least one member of the group consisting of crystallites of tin oxide containing antimony in solid solution, crystallites of antimony-containing tin oxide with uniformly distributed amorphous silica, two dimensional networks of crystallites of antimony-containing tin oxide in a unique association with amorphous silica or silica-containing material, filler materials, metal coated powders, conventional ECP materials such as carbon, aluminum powder, among others.

Abstract: The invention concerns an iron-based powder for powder-metallurgically producing components by powder compacting and sintering. The powder which essentially consists of 0.7-2.0% of Mo, 0.2-2.5% by weight of Cr and 0-3.0% by weight of Cu, 0.05-0.25% by weight of Mn and 0.3-1.0% by weight of C, wherein Fe, Mo and Mn are present as a prealloyed, water atomised FeMoMn base powder, Cr is present as FeCr, Cu is present as a metal or partially prealloyed powder and C is present as a graphite, exhibits very interesting properties. The invention also includes a method for preparing sintered components from this iron powder.

Abstract: A clayish composition for producing a molded article of noble metal consists essentially of a noble metal powder, starch and a water-soluble cellulose resin as organic binder and water. The contents of the starch and the water-soluble cellulose resin each fall in the range of 0.02-3.0% by weight, based on the total amount of the organic binder and the noble metal powder. A method for producing the sintered article of noble metal consists essentially of a step for producing the clayish composition mentioned above, a step of molding the clayish composition in a desired shape, a step of drying the molded article and a step of sintering the dried molded article.