Abstract: Some variations provide a process for additive manufacturing of a nanofunctionalized metal alloy, comprising: providing a nanofunctionalized metal precursor containing metals and grain-refining nanoparticles; exposing a first amount of the nanofunctionalized metal precursor to an energy source for melting the precursor, thereby generating a first melt layer; solidifying the first melt layer, thereby generating a first solid layer; and repeating many times to generate a plurality of solid layers in an additive-manufacturing build direction. The additively manufactured, nanofunctionalized metal alloy has a microstructure with equiaxed grains.

Abstract: Cemented carbide contains first hard-phase particles containing WC, second hard-phase particles which contain carbonitride containing at least Ti and Nb, and a metallic binder phase containing an iron-group element. The second hard-phase particle includes a granular core portion. The core portion contains composite carbonitride expressed as Ti1-X-YNbXWYC1-ZNZ, where X is not smaller than 0.1 and not greater than 0.2, Y is not smaller than 0 and not greater than 0.05, and Z is not smaller than 0.3 and not greater than 0.6. The cemented carbide has an absolute value of a difference not greater than 10, between a ratio (%) of an area occupied by the second hard-phase particles at a surface thereof and a ratio (%) of an area occupied by the second hard-phase particles in a region extending from the surface by 0.5 mm in a direction of depth.

Abstract: A cutting element for a drill bit can include a first layer of polycrystalline diamond, a second layer of polycrystalline diamond, wherein a boundary between the first layer and the second layer is nonplanar, and a substrate. The first and second layers can be formed from polycrystalline diamond of different grain sizes. One of the first and second layers can be leached of a catalyzing material. The first layer can be formed on a first substrate having a nonplanar surface feature, removed from the first substrate, and placed over the second layer to form the nonplanar boundary. The first layer can be leached of a catalyzing material prior to being applied to the second layer. A barrier layer can be placed between the first layer and the second layer to prevent sweeping of a catalyzing material into the leached first layer.

Abstract: A method for producing a valve seat ring via powder metallurgy may include compacting a powder mixture including 4% by weight to 16% by weight particles of cobalt to form the valve seat ring. The method may also include sintering the powder mixture after compacting the powder mixture. Before compacting the powder mixture, 80% of the particles of cobalt may have a particle diameter of approximately 4.4 ?m to 17.5 ?m.

Abstract: A method for producing a powder-metallurgical product may include providing a powder mixture, forming the powder mixture into a green body, and sintering the green body to form a resulting powder-metallurgical product. The powder mixture may include a first hard phase, a second hard phase, 0 to 1.8% by weight of graphite, 0 to 5% by weight each of cobalt, tri-iron phosphide, copper, bronze, phosphorous, sulphur, calcium fluoride and molybdenum, 0.1 to 1.8% by weight of a pressing aid and a flow improver, and a remaining proportion that is an iron-base powder. The first hard phase may include 52 to 78% by weight of molybdenum, 0 to 2% by weight of silicon, 0 to 1.5% by weight of copper, and a remaining weight proportion of iron and production-related contaminations. The second hard phase may include 0 to 0.8% by weight of manganese and less than 0.1% by weight of carbon.

Abstract: A method for making a polycrystalline diamond construction is disclosed, which includes the steps of treating a polycrystalline diamond body having a plurality of bonded together diamond crystals and a solvent catalyst material to remove the solvent catalyst material therefrom, wherein the solvent catalyst material is disposed within interstitial regions between the bonded together diamond crystals, replacing the removed solvent catalyst material with a replacement material, and treating the body having the replacement material to remove substantially all of the replacement material from a first region of the body extending a depth from a body surface, and allowing the remaining amount of the replacement material to reside in a second region of the body that is remote from the surface.

Abstract: Polycrystalline diamond constructions include a diamond body comprising a matrix phase of bonded together diamond crystals formed at high pressure/high temperature conditions with a catalyst material. The sintered body is treated remove the catalyst material disposed within interstitial regions, rendering it substantially free of the catalyst material used to initially sinter the body. Accelerating techniques can be used to remove the catalyst material. The body includes an infiltrant material disposed within interstitial regions in a first region of the construction. The body includes a second region adjacent the working surface and that is substantially free of the infiltrant material. The infiltrant material can be a Group VIII material not used to initially sinter the diamond body. A metallic substrate is attached to the diamond body, and can be the same or different from a substrate used as a source of the catalyst material used to initially sinter the diamond body.

Abstract: A sintered compact having a density of 7.5 g/cm3 or more is formed by mixed powder. The mixed powder is obtained by mixing graphite powder having an average particle diameter of 8 ?m or less and diffusion alloyed steel powder. The ratio of the graphite powder is from 0.05 wt % to 0.35 wt % with respect to 100 wt % of the diffusion alloyed steel powder. Or, the mixed powder is obtained by mixing the graphite powder and completely alloyed steel powder. The ratio of the graphite powder is from 0.15 wt % to 0.35 wt % with respect to 100 wt % of the completely alloyed steel powder.

Abstract: A bearing for a motor-type fuel pump comprises a Zn—P—Ni—Sn—C—Cu-based sintered alloy and has corrosion resistance to a coarse gasoline containing sulfur or an organic acid(s); superior wear resistance; and superior conformability with a shaft as a counterpart. The bearing is suitable for use in a downsized fuel pump and has a structure in which a base comprises 3 to 13% by mass of Zn, 0.1 to 0.9% by mass of P, 10 to 21% by mass of Ni, 3 to 12% by mass of Sn, 1 to 8% by mass of C and a remainder composed of Cu and inevitable impurities. The base also comprises a solid solution phase of a Zn—Ni—Sn—Cu alloy. A Sn alloy phase containing no less than 15% by mass of Sn is formed in grain boundaries of the base. Pores have a porosity of 8 to 18% and free graphite distributed therein.

Abstract: A control circuit having access to information regarding a plurality of models for different materials along with feasibility criteria processes imaging information for an object (as provided, for example, by a non-invasive imaging apparatus) to facilitate identifying the materials as comprise that object by using the plurality of models to identify candidate materials for portions of the imaging information and then using the feasibility criteria to reduce the candidate materials by avoiding at least one of unlikely materials and combinations of materials to thereby yield useful material-identification information.

Abstract: Methods and apparatuses for measurement of residual stresses are provided. For example, a method includes indenting a first portion of a sample having residual stress and generating a residual stress reference zone at a second portion of the sample. Indenting and generating a residual stress reference zone may be performed in situ (e.g., on the same instrument platform, etc.). The present disclosure also provides a method for generating a residual stress reference, the method including providing a first sample having a residual stress and reducing the residual stress in at least a portion of the sample, wherein reducing the residual stress includes raster scanning wear, or exposure to laser energy, ion beam energy, electron beam microscopy, scanning probe microscopy, scanning electron microscopy, heat energy, vibration energy; and exposing the sample to ultrasonic energy.

Abstract: A hard phase forming alloy powder, for forming a hard phase dispersed in a sintered alloy, consists of, by mass %, 15 to 35% of Mo, 1 to 10% of Si, 10 to 40% of Cr, and the balance of Co and inevitable impurities. A production method, for a wear resistant sintered alloy, includes preparing a matrix forming powder, the hard phase forming alloy powder, and a graphite powder. A wear resistant sintered alloy exhibits a metallic structure in which 15 to 45% of a hard phase is dispersed in a matrix. The hard phase consists of, by mass %, 15 to 35% of Mo, 1 to 10% of Si, 10 to 40% of Cr, and the balance of Co and inevitable impurities.

Abstract: A method for protecting powder metallurgy alloy elements from oxidation and/or hydrolyzation during sintering. The method includes (1) coating the admixed alloy elements in an inert (e.g., nitrogen) atmosphere with a hydrophobic lubricant that is capable of becoming mobile during pressing, the amount of lubricant being at least 45% of the total volume of all components to be added to the base metal powder; (2) mixing the lubricant-coated admixed alloy elements with the base metal powder to form a mixture; (3) pressing the mixture to form a pre-sintered part having a green density that is from about 95% to about 98% of a calculated pore-free density; and (4) sintering the part.

Abstract: An electric sharpener for sharpening ceramic blades includes at least one stage. The stage is a finishing station having a sharpening member in the form of a disc which comprises a rigid support having a flexible abrasive matrix which both sharpens and polishes the facet of the ceramic blade. The sharpener may include a pre-sharpening stage for metal blades and a further pre-sharpening stage for ceramic blades. The sharpener also includes a removable guide.

Abstract: Corrosion resistant electrodes are formed of brass that has been doped with phosphorus. The electrodes are formed of brass that contains about 100 ppm to about 1,000 ppm of phosphorus, and the brass has no visible microporosity at a magnification of 400×. The brass may be cartridge brass that contains about 30 weight percent of zinc and the balance copper. Corrosion resistant electrodes also may be formed by subjecting brass to severe plastic deformation to increase the resistance of the brass to plasma corrosion. The corrosion resistant electrodes can be used in laser systems to generate laser light.

Abstract: The present invention relates to new graphene-based steel tubes, pipes or risers, whose products are obtained by a method of manufacturing that consists in adding graphene nanosheets, heat treatment, forming tubular geometry and surface finish. In addition to the unique chemical composition based on graphene, with carbon content ranging between 0.01 and 21.0%, these products have the wall thickness between 800 nm and 80 mm (from ultra fine to thick), diameter between 10 and 5000 mm, and having a tensile strength not less than 2000 MPa reaching up to 50 GPa, with far superior features to those obtained by other methods. Such products can be used for petroleum, natural gas and biofuels transportation, including in deepwater submarine riser systems (>1500 m), with direct application in the oil industry.

Abstract: Disclosed are methods for forming carbon-based fillers as may be utilized in forming highly thermal conductive nanocomposite materials. Formation methods include treatment of an expanded graphite with an alcohol/water mixture followed by further exfoliation of the graphite to form extremely thin carbon nanosheets that are on the order of between about 2 and about 10 nanometers in thickness. Disclosed carbon nanosheets can be functionalized and/or can be incorporated in nanocomposites with extremely high thermal conductivities. Disclosed methods and materials can prove highly valuable in many technological applications including, for instance, in formation of heat management materials for protective clothing and as may be useful in space exploration or in others that require efficient yet light-weight and flexible thermal management solutions.

Abstract: Provided is a sintered bearing (1) obtained by molding raw material powders containing graphite powder and metal powder in a mold, followed by sintering, in which: the graphite powder to be used includes granulated graphite powder; and a ratio of free graphite in a bearing surface (1a) of the sintered bearing is set to from 25% to 80% in terms of an area ratio. An average grain size of the granulated graphite powder is set to from 60 ?m to 500 ?m. A blending ratio of the granulated graphite powder in the raw material powders is set to from 3 wt % to 15 wt %.

Abstract: An iron-based sintered alloy of the present invention is an iron-based sintered alloy, which is completed by sintering a powder compact made by press forming a raw material powder composed of Fe mainly, and is such that: when the entirety is taken as 100% by mass, carbon is 0.1-1.0% by mass; Mn is 0.01-1.5% by mass; the sum of the Mn and Si is 0.02-3.5% by mass; and the major balance is Fe. It was found out that, by means of an adequate amount of Mn and Si, iron-based sintered alloys are strengthened and additionally a good dimensional stability is demonstrated. As a result, it is possible to suppress or obsolete the employment of Cu or Ni, which has been believed to be essential virtually, the recyclability of iron-based sintered alloys can be enhanced, and further their cost reduction can be intended.

Abstract: The present invention relates to a high speed steel with a chemical composition that comprises, in % by weight: 0.6-2.1 C 3-5 Cr 4-14 Mo max 5 W max 15 Co 0.5-4 V, balance Fe and impurities from the manufacturing of the material, which steel is powder metallurgically manufactured and has a content of Si in the range of 0.7<Si?2.

Abstract: The present invention relates to a method for producing diamond-metal composites including mixing diamond particles with metal-filler particles forming a diamond/metal-filler mixture, forming a green body of the diamond/metal-filler mixture, optionally green machining the green body to a work piece before or after pre-sintering by heating the green body to a temperature <500° C., infiltrating the green body or the work piece with one or more wetting elements or infiltrating the green body or the work piece with one or more wetting alloys, which infiltration step being carried out under vacuum or in an inert gas atmosphere at a pressure <200 Bar. The invention relates further to a green body, a diamond metal composite, and use of the diamond metal composite.

Abstract: In an embodiment, a polycrystalline diamond compact includes a polycrystalline diamond table having nanocrystalline diamond present in an amount greater than zero weight percent to about 5 weight percent of the polycrystalline diamond table. The polycrystalline diamond table including a catalyst material distributed throughout at least a portion thereof. The polycrystalline diamond compact includes a substrate bonded to the polycrystalline diamond table.

Abstract: The present invention relates to a method for producing diamond-metal composites comprising mixing diamond particles with metal-filler particles forming a diamond/metal-filler mixture, forming a green body of the diamond/metal-filler mixture, optionally green machining the green body to a work piece before or after pre-sintering by heating the green body to a temperature ?500° C., infiltrating the green body or the work piece with one or more wetting elements or infiltrating the green body or the work piece with one or more wetting alloys, which infiltration step being carried out under vacuum or in an inert gas atmosphere at a pressure ?200 Bar. The invention relates further to a green body, a diamond metal composite, and use of the diamond metal composite.

Abstract: There is provided a metal powder for powder metallurgy including Zr and Si in a manner such that following conditions of (A) and (B) are satisfied, wherein a remainder thereof includes at least one element selected from the group consisting of Fe, Co and Ni, (A) the mass ratio of a content of Zr to a content of Si is 0.03 to 0.3, and (B) the content of Si is 0.35 to 1.5% by mass.

Abstract: A sintered bearing has a structure in which Ni—P alloy particles having an average diameter of 10 to 100 ?m are dispersed in an amount of 1 to 20% by mass in a Cu-based sintered alloy base, a Fe—Cu-based sintered alloy base or a Cu—Ni-based sintered alloy base. The Ni—P alloy particles are derived from a raw material powder comprising 1 to 12% by mass of P; and a remainder composed of Ni and inevitable impurities. The Cu-based sintered alloy base contains no less than 40% by mass of Cu. The Fe—Cu-based sintered alloy base contains no more than 50% by mass of Fe. The Cu—Ni-based sintered alloy base contains 20 to 40% by mass of Ni and 0.1 to 1.0% by mass of P; or contains 10 to 25% by mass of Ni, 10 to 25% by mass of Zn and 0.1 to 1.0% by mass of P.

Abstract: A sintered material for valve guides consists of, by mass %, 1.3 to 3% of C, 1 to 4% of Cu, 0.01 to 0.08% of P, 0.05 to 0.5% of Sn, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and at least one of a copper-tin alloy phase and a combination of a copper phase and a copper-tin alloy phase. A part of the pores includes graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper-tin alloy phase and the combination of the copper phase and the copper-tin alloy phase are dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.

Abstract: Disclosed herein is an engine valve seat, including: iron (Fe) as a main component; about 0.6˜1.2 wt % of carbon (C); about 1.0˜3.0 wt % of nickel (Ni); about 8.0˜11.0 wt % of cobalt (Co); about 3.0˜6.0 wt % of chromium (Cr); about 4.0˜7.0 wt % of molybdenum (Mo); about 0.5˜2.5 wt % of tungsten (W); about 1.0˜3.0 wt % of manganese (Mn); about 0.2˜1.0 wt % of calcium (Ca); and other inevitable impurities.

Abstract: Methods of forming larger sintered compacts of PCD and other sintered ultrahard materials are disclosed. Improved solvent metal compositions and layering of the un-sintered construct allow for sintering of thicker and larger high quality sintered compacts. Jewelry may also be made from sintered ultrahard materials including diamond, carbides, and boron nitrides. Increased biocompatibility is achieved through use of a sintering metal containing tin. Methods of sintering perform shapes are provided.

Abstract: A powder metallurgical combination is provided comprising an iron-based powder A comprising core particles of iron to which core particles nickel is diffusion alloyed and wherein said nickel diffusion alloyed to said core particles comprises 4-7% (preferably 4.5-6%) by weight of said iron-based powder A, and a powder B substantially consisting of particles of pure iron. Further a method is provided for preparing a powder metallurgical combination.

Abstract: An iron-based sintered sliding member is provided in which solid lubricating agent is dispersed uniformly inside of powder particles in addition to inside of pores and particle interfaces of the powder, the agent is strongly fixed, and sliding properties and mechanical strength are superior. The iron-based sintered sliding member contains S: 0.2 to 3.24 mass %, Cu: 3 to 10 mass %, remainder: Fe and inevitable impurities, as an overall composition; the metallic structure includes a base in which sulfide particles are dispersed, and pores; the base is a ferrite phase or a ferrite phase in which copper phase is dispersed; and the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.

Abstract: Provided is a sintered bearing that is capable of reducing cost through reduction in usage amount of copper, excellent in initial running-in characteristics and quietness, and is high in durability. Raw material powders including iron powder, flat copper powder, low-melting point metal powder, and graphite are loaded into a mold, and a green compact is formed under a state in which the flat copper powder is caused to adhere onto a molding surface. Subsequently, sintering is carried out without causing iron in the green compact to react with carbon so that an iron structure is formed of a ferrite phase. In this manner, a sintered bearing (1) including a base part (S2) including copper at a uniform content, and a surface layer (S1) covering a surface of the base part (S2) and including copper at a larger content than the base part (S2) can be obtained.

Abstract: A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.

Abstract: Disclosed herein is an engine 52, in particular a combustion engine or a jet-power unit, or an engine part 54, 56 made from metal, and in particular Al or Mg, or an alloy comprising one or more thereof.

Abstract: A colored metal composite including a metal matrix; and colored particles distributed throughout the metal matrix AND/OR a method including providing metal powder as a first phase of a composite; providing colored particles to form a second phase of the composite; mixing the metal powder and colored particles; and sintering the metal powder around the colored particles to form a metal matrix that has colored particles distributed throughout.

Abstract: A cermet has a hard phase which contains W and nitrogen, and includes at least one selected from a carbide, nitride and carbonitride of a metal having Ti as a main component, and a binder phase having an iron group metal as a main component. A W amount contained in the whole cermet is 5 to 40% by weight, an interfacial phase including a complex carbonitride with a larger W amount than a W amount of the hard phase being present between grains of the hard phase, and when a W amount contained in the interfacial phase based on the whole metal element is represented by Wb (atomic %), and a W amount contained in the hard phase based on the whole metal element is represented by Wh (atomic %), then, an atomic ratio of Wb to Wh (Wb/Wh) is 1.7 or more. The cermet is excellent in fracture resistance and wear resistance.

Abstract: A hard-faced article includes a wear-resistance element that has a precipitated hard phase and a non-precipitated hard phase that is different from the precipitated hard phase in composition. The precipitated hard phase and the non-precipitated hard phase are dispersed through a boron-containing metallic matrix. The precipitated hard phase includes a boride material. The wear-resistance element can include, by weight, less than 50% of the non-precipitated hard phase. The wear-resistance element can also include boron, carbon, chromium and silicon such that, by weight exclusive of the non-precipitated hard phase, a product of the amounts of boron, carbon, chromium and silicon is greater than 28 and less than 350 and the amount of chromium by weight is less than 15%. A method includes forming the wear-resistance element with the precipitated hard phase and the non-precipitated hard phase dispersed through the boron-containing metallic matrix.

Abstract: Disclosed is a method of manufacturing a super hard alloy containing carbon nanotubes, including (a) forming a carbon nanotube-metal composite from carbon nanotubes and metal powder, (b) mixing the carbon nanotube-metal composite obtained in (a) with hard-phase powder, (c) molding the powder mixture obtained in (b), and (d) sintering the molded body obtained in (c). In the method of the invention, the reaction between carbon nanotubes and transition metal carbide in the super hard alloy is minimized, thus maximizing an increase in toughness by virtue of the addition of carbon nanotubes, thereby obtaining the super hard alloy having both high hardness and high toughness. The super hard alloy containing carbon nanotubes manufactured using the method of the invention has high hardness and high toughness, and thus can be effectively utilized in cutting tools, molds, wear-resistant members, heat-resistant structural materials, etc.

Abstract: A welding rod for use in applying hardfacing to a surface of a tool includes an elongated, generally cylindrical body including a metal matrix material. The welding rod also includes particles of polycrystalline diamond material carried by the elongated, generally cylindrical body. The particles of polycrystalline diamond material include a plurality of inter-bonded diamond grains.

Abstract: A bonded metallurgical powder composition including: an iron-based powder having a weight average particle size in the range of 20-60 ?m, in an amount of at least 80 percent by weight of the composition, graphite powder in an amount between 0.15-1.0 percent by weight of the composition, a binding agent in an amount between 0.05-2.0 percent by weight of the composition, a flow agent in an amount between 0.001-0.2 percent by weight of the composition; wherein the graphite powder is bound to the iron-based powder particles by means of the binding agent, and wherein the powder composition has an apparent density of at least 3.10 g/cm3 and a hall flow rate of at most 30 s/50 g. Also, a method for producing a sintered component with improved strength from the inventive composition, as well as to a heat treated sintered component produced according to said method.

Abstract: PCD inserts comprise a PCD body having multiple FG-PCD regions with decreasing diamond content moving from a body outer surface to a metallic substrate. The diamond content changes in gradient fashion by changing metal binder content. A region adjacent the outer surface comprises 5 to 20 percent by weight metal binder, and a region remote from the surface comprises 15 to 40 percent by weight metal binder. One or more transition regions are interposed between the PCD body and substrate. The transition region comprises PCD, binder metal, and a carbide, comprises a metal binder content less than that present in the PCD body region positioned next to it.

Abstract: Provided are a metal-carbon composite material having good workability and a high carbon content and a method for producing the same. The metal-carbon composite material 1 includes a continuous metallic phase 3 and a plurality of carbon particles 2 dispersed in the metallic phase 3. The carbon content in the metal-carbon composite material 1 is 50% or more by volume.

Abstract: Methods of forming larger sintered compacts of PCD and other sintered ultrahard materials are disclosed. Improved solvent metal compositions and layering of the un-sintered construct allow for sintering of thicker and larger high quality sintered compacts. Jewelry may also be made from sintered ultrahard materials including diamond, carbides, and boron nitrides. Increased biocompatibility is achieved through use of a sintering metal containing tin. Methods of sintering perform shapes are provided.

Abstract: Embodiments of a magnesium (Mg) alloy and method for producing the same are disclosed. One such embodiment, among others, is a method for producing a magnesium (Mg) alloy, comprising the steps of: (a) producing a Mg powder aggregate by mixing Mg powder and at least one strengthening agent, the strengthening agent selected from: a carbon, a metal, and a combination thereof; (b) agglomerating the aggregate; and (c) sintering the agglomerated aggregate to produce the Mg alloy. Preferably, although not necessarily, steps (a) and (b) are performed using a ball mill. Moreover, the strengthening agent may be, for example but not limited to, carbon nanotubes, copper, tin, titanium, or silicon carbide. The resulting Mg alloy comprises nano-scale crystalline and/or micro-scale crystalline lattice structures and a yield strength that is at least as high as steel, exhibiting a yield strength that is about 320 MPa to 500 MPa.

Abstract: A sintered material for valve guides consists of, by mass %, 0.01 to 0.3% of P, 1.3 to 3% of C, 1 to 4% of Cu, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and a copper phase, and a part of the pores including graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper phase is dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.

Abstract: A liner for a shaped charge is provided for improved penetration of a target formation. The liner is formed from a combination of high density particulate and low density particulate.

Abstract: A method and composition of a sintered superhard compact is provided. The sintered superhard compact body may comprise superhard particles and a binder phase. The binder phase may bond the superhard particles together. The binder phase comprises tungsten and cobalt. The ratio of tungsten to cobalt is between 1 and 2 and sum of W and Co in the sintered superhard compact is in a range of from about 2 to about 20 percent by weight.

Abstract: A gold-carbon compound that is a reaction product of gold and carbon, wherein the gold and the carbon form a single phase material that is meltable. The compound is one in which the carbon does not phase separate from the gold when the single phase material is heated to a melting temperature.

Abstract: A zinc-carbon compound that is a reaction product of zinc and carbon, wherein the zinc and the carbon form a single phase material that is meltable. The compound is one in which the carbon does not phase separate from the zinc when the single phase material is heated to a melting temperature.

Abstract: The present invention relates to a sintered bearing and a preparation method thereof, wherein the method comprises: a step for forming a mixed powder by mixing metal powder, kish graphite, and lubricant; forming a molded body by applying pressure to the mixed powder; forming a sintered body by sintering the molded body; and impregnating the sintered body in oil. The invention is prepared by adding 0.01-10 parts by weight of kish graphite to metal powder and thus provides excellent abrasion resistance, strength, and self lubricity.

Abstract: A lead-carbon compound that is a reaction product of lead and carbon, wherein the lead and the carbon form a single phase material that is meltable. The compound is one in which the carbon does not phase separate from the lead when the single phase material is heated to a melting temperature.