Abstract: This invention concerns a novel superconductive oxide crystal and a production process thereof, the novel superconductive oxide crystal comprising a superconductive oxide crystal composed of a rare earth element, an alkaline earth meal, copper, and oxygen, in which copper (II) oxide (CuO)) is dispersed like detached islands.

Abstract: A gold colored, tarnish and corrosion resistant alloy is disclosed, usable for jewelry, dental purposes and the like. The alloy consists essentially of 24 to 27 percent palladium, 19 to 22 percent indium, 5 to 30 percent copper, 1 to 20 percent gold, and the balance is essentially silver.

Abstract: An iron base powder mixture for powder metallurgy, comprising an iron based powder and an alloying powder and/or a powder for improving machinability, wherein the alloying powder and/or the powder for improving machinability are adhered to the surface of the ferrous powder by means of a melted-together binder composed of an oil and a metal soap or wax.

Abstract: The present invention provides a process for the electroless plating of easily reducible metals onto ultrafine, usually inert, particles. Such plating is achieved through careful and accurate control of such parameters as the feed rates of the various solutions, the control of pH of the solution, the temperature, pressure and the rate of agitation of the solution in which the plating is taking place. The plated ultrafine composite particles and the powders made from the particles produced by the process are also a part of the invention. There is also provided a metal article of manufacture consisting of a metla such as copper, silver, gold, ruthenium, rhodium, palladium, osmium and platinum with a plurality of shperical shaped ultrafine particles with a diameter of less than about 10 microns dispersed substantially evenly through the metal article.

Abstract: A powder material and a process for producing same are disclosed. The process comprises reducing the size of an electrolytically produced starting dendritic copper powder material by fluid energy milling to produce a finer powder, essentially all of which has a particle size of less than about 20 micrometers in diameter, entraining the finer powder in a carrier gas and passing it through a high temperature zone at a temperature above the melting point of the finer powder, the temperature being from about 5500.degree. C. to about 17,000.degree. C., to melt at least about 50% by weight of the finer powder to form essentially fine spherical particles of the melted portion, and rapidly and directly resolidifying the resulting high temperature treated material while the material is in flight, to form fine spherical particles having a particle size of less than about 20 micrometers in diameter.

Abstract: Copper alloys for electrical and electronic parts and its manufacturing process are disclosed. The copper alloys consist essentially of 20 to 27% Zinc, 2 to 5% Aluminum, 0.5 to 5.0% Nickel, 0.1 to 1% Silicon, and 0.01 to 0.5% Zirconium. The copper alloys are produced by hot and cold rolling, followed by a stress relief heat treatment. The copper alloys of the initial invention exhibit high strength with good spring characteristics and are advantageously used for electric and electronic parts such as connectors, springs, relays, contacts and switches.

Abstract: A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of titanium based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. The material has a particle size of less than about 50 micrometers. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone above the melting point of the finer powder to melt at least about 50% by weight of the powder and form spherical particles of the melted portion. The powder is then directly solidified.

Abstract: A cast composite material is prepared from a modified aluminum-containing matrix and reinforcement particles mixed into the matrix. From about 15 to about 130, preferably from about 20 to about 50, parts per million of an element, preferably beryllium, that forms a more stable oxide than magnesium oxide is included in the matrix alloy. The stable-oxide-forming element reduces the amount and thickness of the aluminum oxide and other oxides formed at the surface of the melt, which otherwise may be mixed into the melt to cause microstructural irregularities in the matrix of the cast composite material.

Abstract: An aluminium flake pigment characterized in that the ratio of the average thickness of flakes to the average diameter of flakes is in the range of 0.025 to 0.3, preferably 0.028 to 0.1 and the ratio of the water covering area to the specific surface area is in the range of 0.18 to 0.4, preferably 0.19 to 0.35 is disclosed herein.The aluminium flake pigment of the invention has the improved resistance to the circulation of the metallic paint during the painting.

Abstract: Proposed herein is a process for producing fine particulate metals comprising reducing fine powder of at least one iron compound selected from the group consisting of iron oxide, iron sulfate and iron chloride with a reducing gas to provide fine particulate iron having a particle size of from 0.1 to 3.0 .mu.m and a specific surface area of from 2.0 to 4.0 m.sup.2 /g, and bringing the fine particulate iron in contact with an aqueous solution containing ions of at least one metal selected from the group consisting of nickel, tin, lead, cobalt, copper and silver thereby forming fine powder of at least one of above-mentioned metals having a particle size of from 0.1 to 3.0 .mu.m in the aqueous solution.

Abstract: An electrically conductive material including 0.15% to 0.35% of Be, 0.3% to 1.5% of Al, either one or both of Ni and Co in a total amount of 1.6% to 3.5%, in terms of weight, and the balance being Cu with inevitable impurities. The alloy may further contain at least one of Si, Sn, Zn, Fe, Mg and Ti in a total amount of 0.05% to 1.0%, in terms of weight ratio. Each of the Si, Sn, Zn, Fe, Mg and Ti is in an amount of 0.05% to 0.35%.

Abstract: A method for forming a single-phase, homogeneous and high surface area metal alloy by reducing a polyheterometallic complex at a low temperature in hydrogen-containing gas.

Abstract: This invention relates to a nickel-cobalt alloy comprising the following elements in percent by weight:______________________________________ Carbon about 0-0.05 Molybdenum about 6-11 Iron about 0-1 Titanium about 0-6 Chromium about 15-23 Boron about 0.005-0.020 Columbium about 1.1-10 Aluminum about 0.4-4.0 Cobalt about 30-60 Nickel balance ______________________________________the alloy having an electron vacancy number, N.sub.v, defined by N.sub.v =0.61 Ni+1.71 Co+2.66 Fe+4.66 Cr+5.66 Mo wherein the respective chemical symbols represent the effective atomic fractions of the respective elements present in the alloy, the value not exceeding the value N.sub.v =2.82-0.017 W.sub.Fe, wherein W.sub.Fe is the percent by weight of iron in the alloy.In one aspect, the alloy of the present invention is preferably finally cold worked at ambient temperature to a reduction in cross-section of at least 5% and up to about 40%, although higher levels of cold work may be used with some loss of thermomechanical properties.

Abstract: Heat and corrosion resistant alloys suitable for use in the manufacture of structral parts for industrial furnaces and like installations where such parts must possess high resistance to oxidation in addition to exceptional levels of hot strength, and which can be air melted and cast or forged. The alloys consist essentially of between about 35% and about 46% by weight nickel, between about 25% and about 29% by weight chromium, between about 10% and about 13% by weight cobalt, between about 5.5% and about 8% by weight tungsten, between about 0.2% and about 1.5% by weight columbium (niobium), between about 0.2% and about 1.5% by weight zirconium, from about 0.05% to about 0.5% by weight titanium, between about 0.3% and about 0.9% by weight carbon, up to about 1.5% by weight manganese, up to about 2% by weight silicon, up to about 0.3% nitrogen and the balance essentially iron.

Abstract: Tin-based alloys filled with steel shots or/and reinforced with short tin-coated steel fibers were prepared by melting the alloy phase and by mixing filler shots/fibers with the molten alloy in an air atmosphere with the addition of ammonium chloride. The content of steel shots ranges up to about 40 weight % and the fraction of tin-coated steel fibers ranges up to about 30 weight %. New reinforced composite alloys have a higher strength than unreinforced conventional alloys while keeping the melting temperature of new composites in the same range of unreinforced alloys.

Abstract: The process for producing crushed zirconium sponge having particle configurations which enhance its compactability, wherein conventionally produced, as-reduced, non-sintered zirconium sponge pieces are loaded into a vacuum furnace, the furnace is heated under partial vacuum at a temperature of up to about 400.degree. C. for a sufficient period to essentially demoisturize and degas the sponge, the temperature is raised to at least about 700.degree. C. and the vacuum terminated, H.sub.2 is fed in a carefully controlled manner into the furnace over a period of several hours in a total amount comprising from about 0.05 to about 0.8% by weight of the sponge, the furnace is cooled, the cooled sponge is pacified, the sponge is removed from the furnace and crushed, the crushed sponge is loaded into a vacuum furnace, the furnace is heated at from about 950.degree. C. to about 1100.degree. C.

Abstract: An aluminum based metal matrix composite is produced from a charge containing a rapidly solidified aluminum alloy and particles of a reinforcing material present in an amount ranging from about 0.1 to 50 percent by volume of the charge. The charge is ball milled energetically to enfold metal matrix material around each of the particles while maintaining the charge in a pulverant state. Upon completion of the ball milling step, the charge is consolidated to provide a powder compact having a formable, substantially void free mass. The mass is then subject to a heat treatment during which it is solutionized at a temperature above the solvus temperature of the alloy, quenched and age hardened at a temperature below the solvus temperature of the alloy to promote precipitation of a primary strengthening Al.sub.3 (Li,Zr) phase and to precipitate substantially all of the Al.sub.3 (Li,Zr) phase into the metal matrix.

Abstract: A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of light metal based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone above the melting point of the finer powder to melt at least about 50% by weight of the powder and form spherical particles of the melted portion. The powder is directly solidified.

Abstract: The present invention relates to a process for the production of fine powder materials and the products of that process. The process involves the in-situ precipitation of second phase particles, such as ceramic or intermetalics, within a metal matrix, followed by separation of the particles from the matrix to yield a powder comprising the second phase particles. Particles formed by this process are typically in the size range of 0.01 to 10 microns and have controlled morphology, narrow size distribution, well defined stoichiometery and relatively high purity. Exemplary of second phase particles formed by this process are metal borides, carbides, nitrides, oxides, silicides and beryllides, including TiB.sub.2, ZrB.sub.2, VB.sub.2, MoB.sub.2, TiC, WC, VC, TiN, ZrSi.sub.2, MoSi.sub.2, Ti.sub.5 Si.sub.3, and TiBe.sub.12.

Abstract: Lead with a low alpha particle emission is produced by selecting an orebody wherein lead mineral is present in a coarsely disseminated form and substantially free of impurities. The ore is selected from a host rock that is relatively low in alpha emitters, such as a carbonate rock. The ore is mined and is milled such that the lead mineral can be separated from the host rock and any other minerals. The ground ore may be screened into one or more fractions having a narrow range of particle sizes. Each fraction is formed into a fluid suspension, and each suspension is subjected to gravity separation to remove the host rock and any other minerals which substantially contain the alpha particle-emitting substances, and to recover the lead mineral as a concentrate with a low alpha count. The lead concentrate is subjected to a suitable smelting operation, without the introduction of alpha emitters for the recovery of a low alpha lead.