Abstract: A process for making a brazed lead electrode workpiece, adapted for use as a component of a semiconductor device, comprises the steps of forming a subassembly of a thermally and electrically conductive metal lead member, a copper/silver-based brazing alloy having a wetting point of at least 450.degree. C, and a refractory metal contact member, and then heating the brazing alloy at least to its wetting point.

Abstract: To form a high density composite structure a mold is filled with relatively large particles of a hard metallic material, such as tungsten carbide; the voids between the particles are filled with substantially smaller particles of the same material and a liquid air-drying, volatile cement is poured over the particles. The filled mold is then covered with a metal brazing powder which is carried through the particle mass by the still-liquid cement. After the cement dries the part is heated in a controlled atmosphere furnace to a temperature above the melting point of the metal powder, and below the melting point of the particle material driving off the cement and causing the balance of the brazing powder to melt and infiltrate the particles to form a composite with a high density of the hard particles embedded in a matrix of the brazing metal. The mold may become brazed to the matrix to form a permanent part of the final structure or may be separable from the matrix after brazing.

Abstract: Addition of strontium to silicon or ferrosilicon using a mixture containing carbon and at least one material selected from the group of strontium oxide, and strontium carbonate and strontium sulfate.

Abstract: This invention consists of a plain bearing in which the bearing surface consists of or includes poly-phenylene sulphide to give good bearing properties and also because such linings can be bonded of backings to steel or aluminum or aluminum alloys with a bond that withstands hard operating conditions, for example changes of temperature and changes of shape and stress. The linear polymer can be cross-linked to a desired extent by appropriate treatment.

Abstract: Platinum-rhodium alloys containing small amounts of boron and zirconium have low creep rates and high resistance to glass corrosion making the alloys particularly suitable for glass-fiberizing bushings.

Abstract: A gold-colored alloy solder for use with dental gold alloys and gold-colored jewelry alloys includes the following ranges of constituents in percentages by weight:______________________________________ Constituent Proportional Range ______________________________________ Gold 60 - 70% Platinum 0 - 10% Palladium 0 - 10% Copper 10 - 25% Gallium 5 - 10% Iridium 0 - 0.01% ______________________________________With the proviso that the total of said platinum and palladium is from about 5-10%.

Abstract: A method and coating material are provided for improving the wear and abrasion resistance of a composite nickel-base hard facing alloy applied to metal substrates comprising the system Ni-Cr-Si-B having dispersed therein particles comprising tungsten carbide, the improvement residing in controlling the average particle size of tungsten carbide to below 10 microns, e.g. 0.1 to 10 microns, preferably an average size ranging from about 2 to 8 microns (such as 2 to 6 microns), at an average interparticle spacing of less than 15 microns, and preferably less than 10 microns, e.g. up to 5 microns, the hard facing coating produced being further characterized in that the coating exhibits metallographically a substantially uniform structure at the surface thereof with respect to said tungsten carbide particles.

Abstract: A low intrinsic value alloy for dental and jewelry use includes the following ranges of constituents in percentages by weight:______________________________________ Constituents Proportional Range ______________________________________ Gold 0-45% Platinum 0-30% Palladium 0-20% Copper 30-55% Gallium 5-10% Zinc 0-1% Iridium 0-0.01% ______________________________________WITH THE PROVISO THAT THE TOTAL OF SAID GOLD, PLATINUM AND PALLADIUM IS AT LEAST ABOUT 35%.

Abstract: An anti-oxidation coating, particularly for the exposed peripheral regions of graphite brake discs for aircraft, comprises a layer of silicon on the surface of the graphite, a layer of nickel overlying the silicon layer and a layer of chromium overlying the nickel layer. The silicon layer is suitably formed by flame-spraying followed by arc-melting, and the nickel and chromium layers by electroplating.

Abstract: A quinary silver alloy containing copper, zinc and tin as essential elements and also including effective amounts of silicon, is provided capable of a variety of uses and having particular utility as a solder or brazing alloy, the alloy having the following composition by weight:35 -- 48% Ag25 -- 35% Zn0.5 -- 3.5% Sn0.01 -- 0.4% Si0 --1% Ni0 --1% Pd0 -- 0.5% Pbalance -- essentially Cu.

Abstract: A copper foil having high bond strength with an insoluble particle-containing metal plate formed thereon, the plated copper foil being adapted for use in the preparation of, for example, a printed circuit.

Abstract: A cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy which can beneficially be used in cable constructions designed for the transmission of electric power or communications. The cable shielding tape may be formed as a strip having one or both sides coated with or laminated to an adhesive thermoplastic resinous polymer. The tape is disposed within a cable at the desired location to provide good mechanical and electrical properties therein. In addition to providing good mechanical and electrical properties for a cable, the aluminum/aluminum alloy shielding tape substantially reduces the problem of bi-metallic galvanic corrosion caused as a result of interfacing metals having widely differing electrolytic potentials.

Abstract: The herein-proposed alloy is characterized in that it contains apart from such known components as copper, tin, aluminium, cadmium, zinc, titanium, chromium, zirconium, manganese, molybdenum, tungsten, iron, cobalt and nickel also vanadium, niobium, tantalum and boron taken either separately or in combination, in an amount of 0.001 to 80 weight percent of the total weight of all the components thereof. The alloy is advantageous in possessing good technological characteristics, being resistant to oxidation at elevated temperatures, featuring good adhesion to all kinds of abrasive materials and giving strong brazing alloys and metallization coatings.

Abstract: Alloy powders suitable for the production of dental amalgams are prepared containing 75-92% silver, 8-23% copper, 1-10% tin and 0-2% zinc.

Abstract: A method is described for forming contacts which find use in vacuum interrupters. The method comprises making melt of a first metal having a high electrical conductivity and adding to the melt a second metal having a melting point in excess of the first metal and solubility in the first metal of less than 1 percent at the temperature to which the first metal is heated, intermixing the components to a uniform consistency casting the components to the desired configuration and thereafter cooling to room temperature.

Abstract: There is provided a copper free dental gold alloy that contains 25 to 40% silver, 40 to 60% gold, 5 to 20% palladium, 0.05 to 0.5% iridium, 0 to 6% indium, 0 to 6% tin and 0 to 2% zinc with the proviso that at least 2% of the named non-noble metals are present, all percents are weight percents.

Abstract: Lead based Type II superconducting alloys having high critical current densities are described. The alloys of the invention are characterized by having a matrix of lead and bismuth and/or indium and having a dispersion of particles of copper, tellurium, selenium, nickel, manganese, calcium, chromium, cerium, germanium or lanthanum or of compounds of these with the matrix constituents having an average particle size less than 2 preferably less than 0.5 microns. The alloys of the invention are preferably made by splat casting.

Abstract: A hard, copper free gold alloy for dental purposes is prepared containing 61 to 85 weight % gold, 8 to 15 weight % platinum, 0 to 4 weight % palladium, 5 to 15 weight % silver and 2 to 5 weight % zinc. 0.05 to 0.1 weight % of the platinum can be replaced by iridium.

Abstract: A protective coating is provided on gas turbine engine type superalloys comprising an interlayer adjacent the superalloy substrate a principal protective element of which comprises an aluminide of the basis metal of the substrate formed by the reaction of aluminum at high temperature with the substrate, and an overlayer comprising an MCrAlY-type coating where M is selected from the group consisting of cobalt, nickel and iron.

Abstract: A reduced melting point interlayer for transient liquid phase diffusion bonding of the nickel, cobalt and iron alloys is provided as a thin coating integral with one or more of the surfaces to be joined.