Abstract: Erosion resistant coating processes and material improvements for line-of-sight applications. The erosion resistant coating composition includes nanostructured grains of tungsten carbide (WC) and/or submicron sized grains of WC embedded into a cobalt chromium (CoCr) binder matrix. A high velocity air fuel thermal spray process (HVAF) is used to create thick coatings in excess of about 500 microns with high percentages of primary carbide for longer life better erosion resistant coatings. These materials and processes are especially suited for hydroelectric turbine components.

Abstract: To improve the fracture resistance of a dental casting alloy without giving rise to undue hardness thereof it is proposed that the dental casting alloy substantially consists of 28–34 wt % Cr, 5–9 wt % Mo, 1–3 wt % W, 0.9–1.3 wt % Si, 0.15–0.3? wt % Mn, 0.1–0.3 wt % N, 0.1–0.3 wt % C, <0.1 wt % Ni, manufacturing impurities, remainder cobalt, the ratio of the content of Mo to that of W being in the range of from about 3:1 to about 5:1 and the ratio of the content of Si to that of Mn being in the range of from about 3:1 to about 9:1.

Abstract: The present invention relates to a cobalt-based alloy for the coating of organs subject to erosion by liquid comprising chromium 28–32% by weight, tungsten 6–8% by weight, silicon 0.1–2% by weight, carbon 1.2–1.7% by weight, nickel 3–6% by weight, molybdenum 1–3%, cobalt the complement to 100%. The invention also relates to an application method of the alloy on organs subject to erosion by liquid, in particular vapour turbine blades, to reduce the metal erosion rate following impact with liquids.

Abstract: The present invention relates to a method for treating organs subject to erosion by liquids, in particular vapour turbine components, which contemplates laser plating with a cobalt-based alloy comprising chromium from 28 to 32% by weight; tungsten from 5 to 7% by weight; silicon from 0.1 to 2% by weight; carbon from 1.2 to 1.7% by weight; nickel from 0.5 to 3% by weight; iron from 0.01 to 1% by weight; manganese from 0.01 to 1% by weight; molybdenum from 0.2 to 1% by weight; possible impurities or other elements from 0 to 0.5% by weight and cobalt the complement to 100%.

Abstract: The invention includes a physical vapor deposition target composed of a face centered cubic unit cell metal or alloy and having a uniform grain size less than 30 microns, preferably less than 1 micron; and a uniform axial or planar <220> texture. Also described is a method for making sputtering targets. The method can comprise billet preparation; equal channel angular extrusion with a prescribed route and number of passes; and cross-rolling or forging subsequent to the equal channel angular extrusion.

Abstract: A protective layer has the composition 0.5 to 2% of rhenium, 15 to 21% of chromium, 9 to 11.5% of aluminum, 0.05 to 0.7% of yttrium and/or at least one equivalent metal from the group consisting of scandium and the rare earths, 0 to 1% of ruthenium, remainder cobalt and/or nickel and production-related impurities, and is scarcely subject to any embrittlement from Cr/Re precipitations.

Abstract: A Co-based alloy comprising 13-16 wt % Cr, 20-30 wt % Mo, 2.2-3.2 wt % Si, and balance Co, with a Cr:Si ratio of between about 4.5 and about 7.5, a Mo:Si ratio of between about 9 and about 15, wear resistance, and corrosion resistance in both oxidizing and reducing acids.

Abstract: The present invention relates to producing cobalt having a low oxygen and a low oxide inclusion content for use as a sputter target thereby reducing the arcing and metal defects during sputtering commonly associated with high-oxygen cobalt sputter targets. Notably, the method for reducing the oxygen content and the oxide inclusion content in cobalt are separate processes which may be combined in successive order to procuce a low-oxygen cobalt sputter target having a low oxide inclusion content. The reduction in oxygen content preferably is performed prior to reducing the oxide inclusion content. Accordingly, the artisan will appreciate that one process can be performed without the other depending upon whether a reduction in oxygen or oxide inclusions is preferred in a desired cobalt sputter target.

Abstract: A Co—Cr—Mo alloy fine wire has superior biocompatibility, corrosion resistance, wear resistance, processability, and flexibility. A manufacturing method and a planar body or the like formed by processing this fine wire. This is a fine wire of diameter of 200 micrometers or less comprising 26 to 31 weight % of Cr, 8 to 16 weight % of Mo, and the remainder of Co and inevitable impurities, in which the degree of roundness (minor diameter/major diameter) of lateral cross section is 0.6 or more, and the internal structure is uniform with the concentration ratio of high Mo concentration phase to low Mo concentration phase of 1.8 or less.

Abstract: This invention takes advantage of the characteristics that the effective charge numbers of different metals have different values and even with different signs, and alloys are prepared with the metals of different signs of effective charge numbers. The effective charge numbers of the alloys are the summation of the mole fraction of each constituent metal times its respective effective charge number. Based on the knowledge of the calculated effective charge number, alloys are prepared with proper selection of constituent metals and proper ratios. When the alloy is under the influence of an electric field, the atoms, with the tendency to move in the same direction of the electron flow, interact with the atoms, with the tendency to move in the opposite. The alloys are thus electromigration effect-free or electromigration effect-insignificant.

Abstract: A cobalt-chromium-boron-platinum sputtering target alloy having multiple phases. The alloy can include Cr, B, Ta, Nb, C, Mo, Ti, V, W, Zr, Zn, Cu, Hf, O, Si or N. The alloy is prepared by mixing Pt powder with a cobalt-chromium-boron master alloy, ball milling the powders and HIP'ing to densify the powder into the alloy.

Abstract: The invention provides improved biocompatible implant alloys and methods of constructing artificial implants having improved long term wear properties. Cobalt-base biocompatible implant alloys provided according to the invention are essentially free of carbide, nitride and sigma second phase particles, and can have hardness and strength properties equivalent to or greater than the standard CoCrMo alloy with significantly improved fatigue life and superior frictional contact properties with UHMWPE. Artificial implant constructions and methods provided according to another aspect of the invention are capable of eliminating latent defects that can promote long term failure of joint implants.

Abstract: In order to provide an alloy which, on the one hand, can be used for the synthesis of crown and bridge frameworks that may be provided with a tooth-colored veneer of ceramic material, and, on the other hand, enable the synthesis of model casting bases, a nonprecious metal dental casting alloy is provided which substantially consists of: 1 26-35 wt % Cr 2-6 wt % Mo 3-12 wt % W 0.8-1.5 wt % Si up to 0.3 wt % Mn 0.1-0.35 wt % N <0.1 wt % Ni 0.2-1.

Abstract: Chromium-cobalt alloys useful for use with high-expansion porcelains in the fabrication of prosthetic dental appliances. The alloys herein comprise cobalt, chromium and manganese as essential components; and include one or more of aluminum, indium, gallium, tin, and germanium; and may include one or more of iron, nickel, palladium and platinum. Optional components include gold, tantalum, niobium, molybdenum, tungsten, vanadium, iridium, ruthenium, rhenium, titanium, silicon, copper, zirconium, hafnium, boron, yttrium, and rare earths metals. The alloys herein are useful with high-expansion dental ceramics and porcelains.

Abstract: Co-based cutting tool insert alloys having a wrought microstructure and 3-15% Mo, 25-35% Cr, 0.5-2.5% C. The presence of W is avoided, and held below 1%. The alloys have enhanced resistance to abrasive and corrosive attack, and are especially suited for manufacturing router bits, router cutters, shaper cutters, molder cutters, etc. for cutting wood in secondary cutting operations such as furniture making or other cutting inserts such as inserts for cutting optical fibers.

Abstract: A group of alloys suitable for use in a high-temperature, oxidative environment, a protective coating system comprising a diffusion barrier that comprises an alloy selected from the group, an article comprising the diffusion barrier layer, and a method for protecting an article from a high-temperature oxidative environment comprising disposing the diffusion barrier layer onto a substrate are presented.

Abstract: In accordance with the invention, nanostructured metallic materials having high tensile strength and increased ductility are prepared by providing a metallic material, deforming the metallic material to form a plurality of dislocation cell structures, annealing the material at a temperature from about 0.3 to about 0.7 of its absolute melting temperature, and cooling the annealed metallic material. The result is a nanostructured metal or alloy having increased tensile strength as compared with the corresponding coarse-grained material and substantially greater ductility as compared with nanostructured material made by conventional processes. Using this process applicants have made nanostructured alloys with tensile strengths in excess of 1.5 Gpa and ductility greater than 1 per cent strain-to-failure. They have also made nanostructured metals with tensile strength in excess of 400 MPa and ductility in excess of 50% strain-to-failure.

Abstract: A fusion weldable superalloy containing 0.005-0.5 wt. % scandium. In one embodiment, the superalloy may have a composition similar to IN-939 alloy, but having added scandium and having only 0.005-0.040 wt. % zirconium. A gas turbine component may be formed by an investment casting of such a scandium-containing superalloy, and may include a fusion weld repaired area. A scandium-containing nickel-based superalloy coated with an MCrAlY bond coat will have improved cyclic oxidation resistance due to the sulfur-gettering effect of the scandium.

Abstract: A Co-based alloy comprising 13-16 wt % Cr, 20-30 wt % Mo, 2.2-3.2 wt % Si, and balance Co, with a Cr:Si ratio of between about 4.5 and about 7.5, a Mo:Si ratio of between about 9 and about 15, wear resistance, and corrosion resistance in both oxidizing and reducing acids.

Abstract: The present invention concerns a non-precious dental alloy, including the following components, with the approximate proportions, in weight, given in %: gold, between 0.5 and 4, molybdenum, between 4 and 6, tungsten, between 2 and 7, indium, between 0.5 and 4, gallium, between 0.5 and 4, tin, between 0 and 4, titanium, between 0 and 2, copper, between 0 and 2, the remainder being obtained with a mixture containing approximately 70% cobalt and 30% chromium.

Abstract: An ingot of material which is normally too brittle to allow successful rolling and wrought processing is formed so as to have a thickness-to-width ratio of less than about 0.5 and is annealed in a temperature range of 1000° F. to 2500° F. for a preselected time. The ingot is then rolled in a temperature range of 1500° F. to 2500° F. Additional/optional annealing of the resulting rolled plate in a temperature range of 500° F. to 2000° F., or between room temperature and 1500° F., and/or a final annealing between 500° F. and 1500° F., is possible. Sputtering targets are cut out of the rolled plate and used for the manufacture of storage disks.

Abstract: A high purity cobalt sputter target is disclosed which contains a face centered cubic (fcc) phase and a hexagonal close packed (hcp) phase, wherein the value of the ratio of X-ray diffraction peak intensity, Ifcc(200)/Ihcp(10 1), is smaller than the value of the same ratio in a high purity cobalt material obtained by cooling fcc cobalt to room temperature from the high temperature at which it is molten. High purity cobalt is defined as having an oxygen content of not more than 500 ppm, a Ni content of not more than 200 ppm, contents of Fe, Al and Cr of not more than 50 ppm each, and Na and K of less than 0.5 ppm. The disclosed sputter target is manufactured by subjecting the material to cold-working treatments (less than 4221C). Annealing the material, at a temperature in the range 300-4221C for several hours, between cold working treatments significantly increases the amount of cold work which could be imparted into the material.

Abstract: A Co-based saw tip for attachment to saw blades for cutting wood, the saw tip formed from an alloy containing Mo in an amount from about 4 to about 20% by weight, Cr, C, and the balance Co. Certain embodiments specifically avoid all W. The tip optionally further contains elements selected from the group consisting of Mn, Si, Ni, B and Fe.

Abstract: An oxidation-resistant coating is described, formed of an alloy containing: about 40 to about 50 atom % aluminum and about 0.5 atom % to about 3 atom % tantalum; with a balance of nickel; cobalt, iron, or combinations thereof. The coating may also include chromium and a precious metal, as well as other components, such as zirconium or molybdenum. A method for applying the oxidation-resistant coating to a substrate is also described. The substrate can be formed of superalloy material, e.g., a turbine engine component. Related articles are also disclosed.

Abstract: Provided are a CoPt-base sputtering target which can produce a magnetic recording medium having a recording layer with uniform film characteristics and excellent recording and reproducing characteristics, a method of making this sputtering target, a magnetic recording film, and a CoPt-base magnetic recording medium. The CoPt-base sputtering target contains Co as the principal component, Pt as an indispensable element, and at least one element selected from the group consisting of the 4a group elements, 5a group elements, 6a group elements, B and C, and the target has a structure in which the maximum inscribed circle diameter of a phase consisting of a Pt simple substance is substantially not more than 500 &mgr;m and in which the thickness of a diffusion layer at the boundary of the Pt phase is substantially not more than 50 &mgr;m. By using this target, it is possible to obtain a magnetic recording film which is used in a hard disk, etc.

Abstract: Cobalt-based Ta-containing magnetic target alloy materials are produced in which homogeneity of the magnetic material is improved by eliminating Ta-rich second phases in the microstructure by a process comprising soaking ingots of said alloy from which targets are to be produced at temperatures ranging from 1600° to 2600° F. for periods of 10 minutes to 24 hours prior to hot-rolling, preferably using multiple steps, then hot-rolling at similar temperatures utilizing at least a 3% reduction for pass, and optionally soaking the rolled plates from said rolling step at temperatures ranging from 2000° to 2600° F. for periods of 10 minutes to 24 hours.

Abstract: A high purity cobalt sputter target is disclosed which contains a face centered cubic (fcc) phase and a hexagonal close packed (hcp) phase, wherein the value of the ratio of X-ray diffraction peak intensity, Ifcc(200)/Ihcp(10 {overscore (1)}1), is smaller than the value of the same ratio in a high purity cobalt material obtained by cooling fcc cobalt to room temperature from the high temperature at which it is molten. High purity cobalt is defined as having an oxygen content of not more than 500 ppm, a Ni content of not more than 200 ppm, contents of Fe, Al and Cr of not more than 50 ppm each, and Na and K of less than 0.5 ppm. The disclosed sputter target is manufactured by subjecting the material to cold-working treatments (less than 422° C.). Annealing the material, at a temperature in the range 300-422° C. for several hours, between cold working treatments significantly increases the amount of cold work which could be imparted into the material.

Abstract: The process for manufacturing a metallic component, such as a wheel part for the rolling system of a vehicle, which includes, in an initial stage, forming the component of a metallic material in a semi-solid state and having a thixotropic structure, and in a subsequent cold-treatment stage, cold-treating at least part of said component by blasting it with projectiles with a view to plastic deformation thereof. A wheel in which a metallic disk is welded to a wheel rim and in which the metallic disk is obtained by the manufacturing process.

Abstract: A high permeability metal glassy alloy for high frequencies contains at least one element of Fe, Co, and Ni as a main component, at least one element of Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, and W, and B. In the metal glassy alloy, the temperature interval &Dgr;Tx of a super cooled liquid region, which is represented by the equation &Dgr;Tx=Tx−Tg (wherein Tx represents the crystallization temperature, and Tg represents the glass transition temperature) is 20° C. or more, and resistivity is 200 &mgr;&OHgr;·cm or more.

Abstract: An ingot of material which is normally too brittle to allow successful rolling and wrought processing is formed so as to have a thickness-to-width ratio of less than about 0.5 and is annealed in a temperature range of 1000° F. to 2500° F. for a preselected time. The ingot is then rolled in a temperature range of 1500° F. to 2500° F. Additional/optional annealing of the resulting rolled plate in a temperature range of 500° F. to 2000° F., or between room temperature and 1500° F., and/or a final annealing between 500° F. and 1500° F., is possible. Sputtering targets are cut out of the rolled plate and used for the manufacture of storage disks.

Abstract: A soft magnetic thin film in the form of a Co—Fe—Ni—C thin film consisting essentially of 40-70% by weight of cobalt, 20-40% by weight of iron, 5-20% by weight of nickel, and 0.02-0.1% by weight of carbon has a high saturation magnetic flux density, excellent soft magnetic properties, and a high electric resistivity.

Abstract: Mn alloy materials for magnetic materials contain 500 ppm or less, preferably 100 ppm or less, oxygen, 100 ppm or less, probably 20 ppm or less, sulfur, and preferably a total of 1000 ppm or less, more preferably 500 ppm or less, impurities (elements other than Mn and the alloying component). The alloying component that forms an alloy with Mn is one or two or more elements selected from the group consisting of Fe, Ir, Pt, pd, Rh, Ru, Ni, Cr and Co. Sputtering targets formed from the Mn alloy materials for use in depositing magnetic thin film, and the thin films so produced.

Abstract: A high-strength low-thermal-expansion alloy consisting of, by weight, 0.06 to 0.50% C, 25 to 65% in total of one or both of 65% or less Co and less than 30% Ni, and balance of Fe as a main component, other optional elements and unavoidable impurities, and having a primary phase of austenite phase and martensite phase induced by working. A wire is made from the alloy.

Abstract: A composite barrel for use in extrusion or injection molding is disclosed. The composite barrel includes an outer housing having a cylindrical bore that extends throughout the length of the outer housing. A wear-resistant lining is disposed on an interior surface that defines the cylindrical bore. The lining is fabricated from an alloy that includes a base metal and phosphorus and the lining may contain hard abrasion-resistant particulate, such as tungsten carbide. The base metal is nickel or cobalt or a mixture of nickel and cobalt. The alloy is typically applied by centrifugal casting and can be cast in a nitrogen-rich atmosphere without creating undesirable lining porosity. Such linings can be made for a fraction of the cost of comparable linings that must be cast under vacuum or in an atmosphere of argon.

Abstract: An improved cobalt-base braze alloy composition and method for diffusion brazing are provided for use in repairing superalloy articles, such as gas turbine engines, power generation turbines, refinery equipment, and heat exchangers. The improved cobalt-base braze alloy composition includes nickel; at least one element selected from the group of rhenium, palladium, platinum, ruthenium, and iridium; at least one element selected from the group of boron and silicon; and the remaining balance consists of cobalt. This composition may also include aluminum and/or one or more rare earth/lanthanide series elements, and the composition may be combined with one or more powdered base metal superalloy compositions to form an improved diffusion braze alloy mixture. In the improved method for repairing superalloy articles, the foregoing mixture is applied to a region of the superalloy article to be repaired.

Abstract: A planar ferromagnetic sputter target is provided for use as cathode in the magnetron sputtering of magnetic thin films, wherein the ferromagnetic material has localized regions of differing magnetic permeability. A solid, unitary, planar sputter target is formed from a ferromagnetic material, such as cobalt, nickel, iron or an alloy thereof, and this planar target is subjected to mechanical deformation, heat treatment, and/or thermal-mechanical treatment to create regions within the sputter target having different permeability than adjacent regions. The permeability differences in the ferromagnetic sputter target guides the path of the magnetic flux flow through the target to thereby increase the magnetic leakage flux at the target sputtering surface.

Abstract: The present invention provides a high purity cobalt sputter target having a single phase h.c.p. structure and a magnetic permeability less than the intrinsic magnetic permeability of the material. Substantially pure cobalt is cast and slowly cooled, such as at a rate of 15° C./min. Or less, to form a cast target of single phase h.c.p. crystallographic structure. This cast target is hot worked at a temperature of at least about 1000° C. to impart a strain of about 65% or greater into the cobalt material, followed by a slow, controlled cooling to room temperature, such as at a rate of 15° C./min. or less, to maintain the single phase h.c.p. crystallographic structure. The cooled target is then cold worked at substantially room temperature to impart a strain of about 5-20%. The sputter target of the present invention processed by this method has a magnetic permeability of less than about 9, grain sizes in the size range of about 70-160 &mgr;m, and average grain size of about 130 &mgr;m.

Abstract: This invention relates to brazing metals composed of cobalt-chromium-palladium-based alloys containing transition metals such as cobalt, nickel, tungsten, molybdenum and certain metalloids; and more particularly to multicomponent alloys containing cobalt, chromium, palladium, nickel, tungsten, molybdenum, boron, and silicon, which are especially useful for brazing metals at high temperatures to produce high strength, high oxidation and high temperature and corrosion-resistant brazements. Alloys of the present invention have a composition represented by the formula:Cr.sub.a Ni.sub.b W.sub.c Pd.sub.d Si.sub.e B.sub.f CO.sub.bal.

Abstract: The invention relates to an article of manufacture comprising: a substrate composed of a superalloy containing chromium and a base element selected from the group consisting of iron, cobalt, and nickel; and an enrichment layer containing chromium and placed on the substrate. Therein, the enrichment layer comprises a continuous matrix composed of a gamma-phase solid solution of chromium in the base element. The invention also relates to the manufacture of such an article. The article may in particular be a gas turbine component.

Abstract: An evaporation material is used in manufacturing a VTR tape, a vertical magnetic recording thin film or the like. The evaporation material is a wire comprising a cobalt metal a cobalt--nickel alloy containing not more than 30 weight % of nickel, or a cobalt--chromium alloy containing not more than 30 weight % of chromium. This wire has a diameter of at least 1.0 mm and not more than 10 mm, a tensile strength of at least 400 MPa and not more than 1500 MPa, and an elongation and a reduction of area of at least 5%. The evaporation material has a prescribed crystal structure, with a face centered cubic lattice ratio of at least 0.1 and not more than 1. It is possible to obtain a wire having the above properties by heating the metal material to at least Tu.degree. C. and thereafter performing plastic working of reduction in area of at least 10% in a single pass at a temperature of at least Td.degree. C. and not more than (Tu+200).degree. C.

Abstract: A Co-base alloy including, by weight, 0.03-0.10% C, not more than 1.0% Si, not more than 1.0% Mn, 20-30% Cr, 15-23% Ni, 3-10% W, 5-10% Ta and 0.05-0.7% Zr, is used as a welding material. A gas turbine nozzle has a crack repaired with a multi-layer weld using the Co-base alloy and a gas turbine for power generation employs the nozzle.

Abstract: An amorphous magnetic material possesses a composition essentially expressed by (Fe.sub.1-a-b N.sub.a M.sub.b).sub.100-x-y Si.sub.x B.sub.y (M denotes at least one kind of element selected from Mn, Cr, Co, Nb, V, Mo, Ta, W and Zr, 0.395.ltoreq.a.ltoreq.0.7, 0.ltoreq.b.ltoreq.0.21, 1-a-b<a, 6.ltoreq.x.ltoreq.18 at %, 10.ltoreq.y.ltoreq.18 at %, respectively). An amorphous magnetic material which has such a Ni rich Fe-Ni base possesses a Curie temperature T.sub.c of 473 to 573K, the maximum magnetic flux density B.sub.m of 0.5 to 0.9T. A ratio of residual magnetic flux density B.sub.r and the maximum magnetic flux density B.sub.m can be controlled according to a required characteristics, and, in the case of being used in a saturable core, is set at 0.60 or more. With an amorphous magnetic material of an inexpensive Fe-Ni base, magnetic characteristics applicable in a high frequency region, thermal stability, surface smoothness can be realized.

Abstract: The present invention provides a scandium containing hydrogen absorption alloy having an alloy phase which is represented by the following formula;(Sc.sub.x A.sub.1-x)(B'.sub.y B".sub.2-y).sub.zwherein A is at least one of Ti, Zr, rare-earth elements, a mixture of Ti and at least one of Zr, Ta, Nb, Hf, Ca and rare-earth elements, and a mixture of Zr and at least one of Ti, Ta, Nb, Hf, Ca and rare-earth elements; B'is at least one of Ni, Fe, Co and a mixture of at least one of Ni, Fe and Co and at least one of Al, Ga, Si and In; B" is at least one of Mn, V, Cr, Nb, Ti and a mixture of at least one of Mn, V, Cr, Nb and Ti and at least one of Al, Ga, Si and In; x represents 0<x.ltoreq.1; y represents 0<y<2; and z represents 0.75.ltoreq.z.ltoreq.1.2, and the alloy phase includes at least one of a part which belongs to a C15 type Laves phase and a part which belongs to a C14 type Laves phase, and a hydrogen absorption electrode which includes the alloy.

Abstract: A sintered hard alloy for tools for cutting wood. The alloy according to the present invention comprises 30-98 volume % hard constituents in a binder phase based on nickel and/or cobalt. The hard constituents comprise oxides, carbides, nitrides and/or borides of Al, Zr, Si and/or Ti, preferably Al.sub.2 O.sub.3, ZrC, ZrO.sub.2, SiC, Si.sub.3 N.sub.4 and/or TiB.sub.2 with a mean grain size <1.5 .mu.m, preferably <1.0 .mu.m. The binder phase comprises in solution, in weight %, Co max 90, Ni max 90, Cr 5-45.

Abstract: An improved cobalt-base braze alloy composition and method for diffusion brazing are provided for use in repairing superalloy articles, such as gas turbine engines, power generation turbines, refinery equipment, and heat exchangers. The improved cobalt-base braze alloy composition includes nickel; at least one element selected from the group of rhenium, palladium, and platinum; at least one element selected from the group of boron and silicon; and the remaining balance consists of cobalt. This composition may also include aluminum, and the composition may be combined with one or more powdered base metal superalloy compositions to form an improved diffusion braze alloy mixture. In the improved method for repairing superalloy articles, the foregoing mixture is applied to a region of the superalloy article to be repaired. The mixture is then heated to melt the cobalt-base braze alloy, thereby joining the base metal superalloy powder particles together, and joining the entire mixture to the region being repaired.

Abstract: Grain growth inhibitors including vanadium carbide, chromium carbide, tantalum carbide, and niobium carbide are incorporated into a cobalt/tungsten carbide matrix during the formation of the cobalt/tungsten carbide matrix. A precursor powder is formed by combining in solution a cobalt composition, a tungsten composition and a grain growth inhibiting metal composition, which is then spray dried. The precursor compound is then carburized in carbon monoxide and carbon dioxide to form cobalt/tungsten carbide matrix. This is then further carburized in a hydrocarbon hydrogen gas at an elevated temperature to cause the grain growth inhibiting metal present to form the carbide. The second carburizing step is conducted with a carburizing gas having a carbon activity greater than about 2 for a relatively short period of time at 900.degree. C. to 1000.degree. C.

Abstract: A harmonic-type EAS marker includes a wire segment formed of cobalt alloy. To form the wire segment, the cobalt alloy is cast as an amorphous wire, die-drawn to a smaller diameter, and then annealed with application of longitudinal tension. The annealed wire is cut to produce wire segments which have a magnetic hysteresis loop with a large Barkhausen discontinuity at a lower threshold level than has previously been achieved.

Abstract: A part of a light-water reactor, for example, a cladding for a light-water reactor has at least a portion made of an intermetallic compound, such as Ni.sub.3 Al, Ni.sub.2 Al.sub.3, TiAl, Ti.sub.3 Al, Pt.sub.2 Si, PtSi, FeAl.sub.2, CoAl, and MoSi.sub.2, thereby having limited irradiation degradation by fast neutrons, improved ductility and usability at high temperatures the intermetallic compound is produced by a process comprising a step of irradiating the intermetallic compound with at least one selected from the group consisting of a neutron, a light ion, and an electron. The intermetallic compound may contain a twin and a third additional element segregatedly present or forms a second phase at or near to a grain boundary.

Abstract: A piston shoe (10) of an axial piston pump or motor is crimped to an annular piston head (42) and has a flat shoe wear surface (12) that contacts a cam plate (22). A back flange (14) of the shoe (10) also wears against an auxilliary cam plate (24). In order for the piston shoe (10) to operate within a fuel environment, the piston shoe (10) must be corrosion resistant, compatible with fuel, and provide the desired wear resistance. The piston shoe (10) is made of a cold workable cobalt based alloy which is compatible with fuel and provides corrosion resistance. The wear surface (12) which bears against the cam plate (22) and the back flange (14) which bears against the auxilliary cam plate (24) are provided with a thermal diffusion boride treatment which provides the desired wear resistance. In order to restore sufficient ductility to flange (16) of the shoe (10) that will be cold worked, a solution treatment is performed at a temperature range of 2050.degree. to 2250.degree. F. in a non-oxidizing environment.

Abstract: Target for a magnetron-cathode sputtering apparatus is made from a cobalt base alloy containing additional elements in such concentrations that intermetallic phases are formed with at least one of these elements and intermetallic phases are observed on the basis of the phase diagram in the state of equilibrium at the operating temperature of the target. The grain boundaries, sub-grain boundaries, twin-grain boundaries or slip bands of the cobalt mixed crystal forming the matrix are decorated with the elements forming the intermetallic phases. X-ray diffraction diagrams made from the target display reflections of an intermetallic phase which is largely absent in the cast state and which forms only during a heat treatment in the temperature range below the solidus temperature of the alloy by a solid state reaction.