Abstract: A dental amalgam which comprises about 40 to 50 weight percent mercury and about 50 to 60 weight percent of an alloy which comprises 24 to 45 weight percent silver, 28 to 42 weight percent copper and 29 to 34 weight percent tin, and where the atomic percentage of the total amount of silver plus copper is about 3 times greater than the atomic percentage of tin.

Abstract: The addition of copper, either as a thin film or as an alloy constituent, to nickel-chromium alloys improves the adhesion of such alloys to polymeric substrates and coatings.

Abstract: A metallization system for metallurgically bonding a semiconductor die to metallic conducting slugs as terminals at the same time, and at the same temperature, that a surrounding glass sleeve is hermetically sealed to the conducting slugs for forming a zener diode, for example, is disclosed. The metallization system comprises a combination of aluminum, tin and palladium, for bonding to molybdenum, the aluminum being vapor deposited followed by a vapor co-deposition of aluminum and tin and further followed by a vapor deposited layer of palladium.

Abstract: A contact for a silicon device comprises a sintered nickel layer on the silicon, a layer of gold over the sintered nickel layer, and a layer of cobalt on the layer of gold.

Abstract: An alloy comprising silver plus one or more additives taken from the class consisting of gold, platinum, osmium, iridium, palladium, ruthenium and rhodium is disclosed. Each additive metal is present in an amount of from 0 to 1% by weight of the alloy. The total amount of additive is at least 0.05% by weight of the alloy. A method of making permanent electrical connections using the alloy is also disclosed.

Abstract: A white gold alloy consisting essentially of 50-54% gold, 27-31% palladium, 11-16% silver, about 0.05-0.25% of iridium or ruthenium, and 4.5-8% of indium and tin, provided there is at least 2% indium, no more than 4.5% tin, and further provided that if there is less than about 6% indium, the alloy must contain at least 0.25% tin. The alloy meets or at least narrowly approaches the ADA Spec. No. 5 for Type IV dental casting gold alloys, and is useful for dental appliances and for the fusing of porcelain thereto for dental restorations.

Abstract: Readily installable, highly efficient insulating structures for affixation to bodies requiring insulation comprise successive sheets of closely spaced heat resistive metal foil configured to maintain the intersheet spacing under the stress of gravity and other external forces. Each sheet of foil includes a plurality of corrugations which extend through part but not all of the gaps between adjacent sheets to minimize convection, and which in one embodiment abut corrugations of adjacent sheets to maintain the intersheet spacing. In one embodiment the corrugations are V-shaped in cross section and extend along the length of the sheet on one side thereof.

Abstract: An improved metal coating for a video disc of a grooved polymer disc, a conductive metal coating thereon and a dielectric coating on said metal coating comprising a trilayer film of a first layer of copper about 25-50 angstroms thick, a second layer about 200 angstroms thick of an alloy of nickel, and chromium and, optionally, iron, containing from about 20 to about 30 atomic percent of oxygen, and a third layer, of copper, about 25-50 angstroms thick.

Abstract: An improved metal powder blend and improved dental amalgams produced therefrom comprising a mechanical mixture containing controlled proportions of an amalgamatable silver-base alloy powder and a substantially non-amalgamatable eutectic alloy powder containing a controlled quantity of tin which upon trituration with mercury forms a substantially continuous matrix having dispersed therethrough discrete phases of the non-amalgamatable powder particles which impart improved mechanical properties to the resultant dental restoration.

Abstract: A vacuum-tight metal-ceramic soldered joint and a method of producing such joint wherein the joint includes a ceramic member having an aperture defined therein, a metallic coating on the wall of the aperture, a solderable plug composed of metal powder positioned in the aperture of the ceramic member, and a hole defined in the solderable plug with an electrical and mechanical through-connection positioned therein.

Abstract: Methods of coating metal articles to protect them from corrosion, and the products of such methods. Metal articles which have been electroplated with zinc, cadmium, nickel or chromium, are chromated, and coated with a hydrophobic thermosetting polymer, and heated to convert the polymer to a hard, adherent film. Multiple polymer coatings are applied prior to heat curing.

Abstract: A nitrogen containing additive for strengthening cast iron which contains silicon, calcium, nitrogen, at least one of chromium and manganese and the balance being iron and incidental impurities. Addition of said additive to flake graphite cast iron melt results in increase in tensile strength by 7 - 15 kg/mm.sup.2 and hardness by 20 - 60 in Brinell hardness and reduction in depth of chill due to synergistic effect of the alloying elements contained in the additive.

Abstract: A metalization process for the manufacture of hybrid integrated circuit elements including boards and semiconductors to be attached thereto involves applying to a substrate of insulating material such as aluminum oxide, successive layers of sputtered nickel-chromium and nickel, an electroless deposit of nickel-boron and, frequently, an electro-deposited layer of gold. The assembly is then normally heat-treated to stabilize the resistive layer. The addition of the nickel-boron layer provides many advantages in that reliable low-temperature solder connections may be made to it, ultrasonic wire bonds of high reliability may be accomplished with the usual aluminum wire supplied with most discrete components, the heat-treating step is considerably shortened in time with greater stability of resistance values, and the assemblies thus manufactured are capable of operating in comparatively high-temperature environments.

Abstract: A saw and impact resistant member formed of an elongated metal core having a longitudinal exterior surface and a thin wall metal sheath surrounding said core and in contact with said core surface at a finite number of contact lines with longitudinal spaces being formed between the interior wall of said sheath and the exterior surface of the core. The spaces are filled with a matrix formed of hard carbide particles and a soft binder material. The sheath is closely fitted on the core to exclude both binder and hard particles therebetween except in said longitudinal spaces.

Abstract: A dental amalgam which comprises about 40 to 50 weight percent mercury and about 50 to 60 weight percent of an alloy which comprises 46 to 53 weight percent silver, 18 to 24 weight percent copper and 29 to 34 weight percent tin, and where the atomic percentage of the total amount of silver plus copper is about 3 times greater than the atomic percentage of tin.

Abstract: This invention relates to a magnetic recording medium, which comprises a first protective plating layer consisting of at least one selected from the group consisting of rhenium, osmium, ruthenium, chromium, rhodium and mixtures thereof, provided on a ferromagnetic thin layer plated on a non-magnetic base material by a plating method, and a second protective plating layer consisting of at least one selected from the group consisting of silver, gold, copper, platinum, palladium, nickel-phosphorus alloys and mixtures thereof, further provided on the first protective plating layer.

Abstract: A coating system for protecting metallic substrates in reducing or oxygen-free environments which includes a first layer of chromium carbide plus metallic binder having a thickness of from 0.001 to 0.015 inches and a surface layer of all chromium carbide having a thickness of from 0.0005 to 0.005 inches.

Abstract: An improved substrate on which a cobalt-magnetic recording layer may be plated and a method for producing it. The substrate includes inner and outer nickel layers with an intermediate gold layer between them. This results in a smooth surface on which a uniform and adherent cobalt recording layer can be deposited.

Abstract: The contact materials comprise silver with additions of mercury or mercury and tellurium and silver-cadmium oxide compositions with additions of mercury and tellurium. The methods of making the materials include the steps of adding a silver-mercury alloy to molten silver and to a molten silver-tellurium powder mixture. The materials including cadmium oxide are produced by heating a mixture of powders of silver, a cadmium-tellurium compound, cadmium oxide, and mercuric oxide powders in a reducing atmosphere and then reoxidizing.

Abstract: A novel iridium alloy composition containing dopant level additions of aluminum, iron, nickel, rhodium and thorium is useful as a containment vessel for isotopic heat sources.