Abstract: The soldering alloy comprises at least:65 to 85% lead in weight12 to 30% cadmium in weight1 to 6% antimony in weight0.5 to 1% tin in weight.In a method for soldering metal parts, the parts are submitted to an organic flux on the portions thereof to be connected together, said portions are coated with the above mentioned soldering alloy, then they are heated to the liquidus temperature of the soldering alloy while being held together in contact.

Abstract: A composite including a plurality of metal layers has a Cu-Al-Fe bronze layer and at least one outer layer of a heat and corrosion resistant metal alloy. The bronze layer is ordinarily intermediate two outer layers of metal such as austenitic stainless steel, nickel alloys or alloys of the refractory metals. The composite provides a barrier to hydrogen isotopes, particularly tritium that can reduce permeation by at least about 30 fold and possibly more below permeation through equal thicknesses of the outer layer material.

Abstract: A new dental alloy powder comprising homogeneous particles having a composition of 35 to 50 percent silver, 20 to 30 percent copper, 25 to 35 percent tin and 2 to 8 percent indium.

Abstract: Articles having a non-skid surface of a roughened character and substantial thickness embody a base sheet having a roughened surface with particles of grit bonded thereto by metal which has been solidified in place in contact with the grit particles and base sheet and further bonded in place by an overlaying layer of solidified metal.

Abstract: A solar absorber comprising a 1000 to 1500 A thick layer of lead sulfide on a thermally conductive base. The solar absorber reflects on the order of 97% of the infrared while absorbing between 90 and 95% of the solar radiation band.

Abstract: An article of improved oxidation resistance includes a metal base of a NiCr dispersion-modified alloy including, by weight, 15 - 30% Cr, 0.1 - 10% of oxides selected from oxides of the rare earth elements, particularly Th, Y and La, up to 1% of elements selected from Ti and Al, with the balance Ni and incidental impurities. To the base is applied a coating consisting essentially of, by weight, about 8 to less than about 14% Al, about 15 - 30% Cr, about 0.01 - 10% of elements selected from Y and Hf, with the balance essentially nickel and incidental impurities.

Abstract: This application describes the addition of an alkali metal, generally in the form of a salt thereof, to a mixture of silver and cadmium oxide, prior to the sintering step, to improve the as-sintered densities of the resultant alloy material.

Abstract: This application describes the addition of an alkali metal, generally in the form of a salt thereof, to a mixture of silver and cadmium oxide, prior to the sintering step, to improve the as-sintered densities of the resultant alloy material.

Abstract: A method of making aluminum castings having a self-fused high silicon content in the interior matrix near and at the surface. A sand core is coated with a tacky, low-ash, low-volatile adhesive along a predetermined zone. Silicon dust particles are deposited on said adhesive in bonded relation. Molten aluminum is cast into a mold cavity containing the coated core. After mold stripping, the silicon particles are exposed as metallurgically bonded to the aluminum but along an ultra-thin depth. At least some of the exposed silicon particles are machined to expose a planar facet and thereby increase the projected exposure of the silicon particles along the machined plane. The resulting product has a reduced shrinkage characteristic (typical of aluminum alloys having a high proportional precipitated silicon).

Abstract: This relates to a multi-layer composite metallic sheet having a predetermined coefficient of thermal expansion for use as a heat sink and mounting arrangement when bonded to a ceramic substrate. Since copper has a coefficient of thermal expansion greater than that of ceramic and molybdenum has a coefficient of thermal expansion less than that of ceramic, layers of copper and molybdenum can be combined to provide a composite having a coefficient of thermal expansion equal to that of ceramic. To avoid a bimetallic effect, a core layer of a fused metal is sandwiched between two outer layers of the second metal.

Abstract: The diffusion brazing of members comprised of materials which are characterized by embrittlement as a result of exposure to excessive temperatures is accomplished with the aid of preforms consisting of a titanium-zirconium alloy foil coated with a plurality of eutectic depressant alloying agents. The depressant agents, in a preferred embodiment, are applied as layers and consist of beryllium and nickel. The preforms are sandwiched between surfaces to be joined and the resulting assemblies are heated in a non-reactive environment with light pressure loading whereby a liquid phase will result and diffusion of metal from the preform into the base metals will occur.

Abstract: The present aluminum bronze contains 4 to 12% by weight of aluminum, not more than 1% by weight of at least one of solid solution silicon and beryllium, and more than the eutectic composition in the equilibrium phase diagram for quasi-binary copper-aluminum (Cu-Al) and iron silicide alloy, but not more than 10% by weight of iron silicide, the balance being comprised substantially of copper, and has, as cast, a percent elongation of 10% or more, a tensile strength of 50 kg/mm.sup.2 or more and a better wear resistance than the ordinary aluminum bronze.

Abstract: A nickel-chromium-titanium filler alloy for inert gas shielded-arc welding of 50% Cr, 50% Ni type alloys. The wrought alloy is characterized by a single phase austenitic microstructure and contains, by weight, from about 42 to about 46% chromium, from about 0.1 to about 1.8% titanium, from about 0.01 to about 0.1% carbon, and up to about 0.1% magnesium with the balance, apart from incidental elements, essentially nickel. The alloy provides sound welds having a two phase microstructure that afford elevated temperature strength and corrosion resistance equal to that afforded by base metals of the 50% Cr, 50% Ni type.

Abstract: Permalloy type alloys containing rhodium suitable for use in magnetic devices and having improved resistance to corrosion contain from about 65 to 90 atomic percent nickel, 10 to 35 atomic percent iron and 1 to 25 atomic percent rhodium. Magnetic films made of these alloys which contain 1 to 10 atomic percent rhodium exhibit magnetic properties similar to Permalloy while having increased resistance to corrosion.

Abstract: Nickel and cobalt base alloy articles are provided coated with a composition consisting essentially of about 20-60% chromium, 6-11% aluminum, 0.01-2.0% of a reactive metal such as yttrium, lanthanum or cerium and the balance nickel.

Abstract: The contact element is produced by ultrasonically welding one or more contact pieces onto a carrier, an intermediate layer, for example of aluminium foil, being interposed between the contact piece and the carrier prior to such welding in order to assist in the welding of contact pieces made of material which would otherwise be difficult to weld.

Abstract: An improved alloy for a dental amalgam includes silver and tin and the additional element, manganese. The alloy is comprised of a minimum of about 60% by weight silver, a maximum of about 15% by weight manganese and the balance tin. Various amounts of other constituents known to those in the art such as gold, copper, zinc and mercury may be included.

Abstract: Small concentrations of certain dispersed oxides such as CeO.sub.2 substantially improve the electrical contact properties of gold. Gold with dispersed CeO.sub.2 is superior to gold for use as an electrical contact because of much greater resistance to arc erosion and welding and only slightly higher contact resistance.

Abstract: A composite of a metallic material and vulcanized rubber is produced by contacting an unvulcanized rubber with a metallic material coated with a ternary alloy composed of copper, zinc and tin.

Abstract: Bright, tarnish resistant and color stable ternary alloys of about 40 - 90% of tin, about 10 - 50% cobalt and about 1 - 28% of a third metal of Periodic Group II.sub.B, III.sub.B or VI.sub.B. Typical third metals are zinc, cadmium, indium, antimony or chromium. The alloys are electrodeposited from aqueous acidic baths at a temperature of about 50 - 85.degree. C and current density of about 5 - 45 A/ft.