Abstract: Electromigration activity is decreased and lifetime is extended in solder stripes employed as conductors and terminals on microelectronic devices by forming an alloy of a solute element, such as copper, with tin in a lead/tin solder and providing a substantially uniform distribution of particles of the intermetallic compound in the solder. The concentration of the solute element is maintained at less than about three times the tin concentration and less than about 10% of the amount of the solder.

Abstract: Superplastic aluminum alloy strips comprising 1.5 to 90% of magnesium, 0.5 to 5.0% of silicon, 0.05 to 1.2% of manganese, 0.05 to 0.3% of chromium and the balance consisting essentially of aluminum, and also a process for producing superplastic aluminum alloy strips comprising continuously casting and rolling a molten aluminum alloy containing 1.5 to 9.0% of magnesium, 0.5 to 5.0% of silicon, 0.05 to 1.2% of manganese and 0.05 to 0.3% of chromium, thereby obtaining a cast strip of 3 to 20 mm in thickness, homogenizing the cast strip at a temperature of 430.degree. to 550.degree. C., and subjecting the homogenized strip to cold rolling until the reduction ratio reaches up to a value of not less than 60%.

Abstract: A cast dam, for use in a tundish, is described. The dam is positioned between the tundish walls in the lower part and protrudes from the tundish floor. It has an L-shape. The dam has ducts connected to at least one pipe for conveying a supply of gas to the tundish. The ducts extend from the pipe to at least one dam surface which becomes exposed to molten metal during use of the tundish. A weir is also provided in the tundish.

Abstract: A one-piece sealed disposable enema unit with a lubricated rectal tip is disclosed. The rectal tip of the unit is sealed with a break-off tab. Attached to the tab is a sleeve which covers the exterior of the the rectal tip and prevents contamination of the lubricant. Before use, the break-off tab must be twisted off and the tab with the attached sleeve removed. Therefore, the unit is tamper proof and security of the contents is insured.

Abstract: Aluminum alloy sheet constituted of an alloy containing 0.65-0.79% Cu, 0.62-0.82% Mg, and 0.60-1.0% Si, produced by the successive steps of casting, homogenizing, cold rolling and solution-heat-treating, the sheet having strength and formability suitable for forming into automotive body members and being age-hardenable under paint-baking conditions.

Abstract: A device comprising a rotary shaft to be disposed in a liquid substantially vertically and rotatable about its own axis, the rotary shaft having a gas channel extending therethrough axially of the shaft, and a rotor fixed to the lower end of the rotary shaft and having at its bottom surface a gas discharge outlet communicating with the gas channel. The rotor is formed in its bottom surface with radial grooves extending from the gas outlet to the peripheral surface of the rotor and each having an open end at the peripheral surface. A recess is formed in the peripheral surface between the open ends of immediately adjacent grooves and has an open lower end at the bottom surface. When the rotary shaft is rotated in a liquid while supplying a gas to the gas channel of the shaft, the gas flows out from the discharge outlet into the radial grooves and is released from the open ends of the grooves at the peripheral surface into the liquid in the form of finely divided bubbles.

Abstract: A fence stretcher bar manufactured from a continuously fed, hot dip galvanized bar and a method of making such a stretcher bar. In a first manufacturing phase, the bar is formed from a continuously fed round rod which is rolled into a flat bar and coiled on a mandrel. The flat bar is then continuously fed into a second phase of the operation which includes annealing, cleaning with acid, coating with zinc ammonium chloride and hot dip zinc galvanizing. The material is cut to length and the cut ends are flame-spray coated with zinc. The bar is of substantially longitudinal configuration with two cut ends substantially perpendicular to a longitudinal axis thereof and having a cross section defining two parallel planar sides and two transverse curvilinear convex surfaces.

Abstract: A copper-base alloy for leadframes comprising 0.8-4.0 weight % of Ni, 0.2-4.0 weight % of Ti, and balance Cu and inevitable impurities, the ratio of Ni to Ti being 1-4. It may also comprise 0.1-2.0 weight % of Zn. It may further comprise 0.01-2.0 weight % of at least one of Fe and Co and 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg. The copper-base alloy has good electric conductivity and high mechanical strength. It further has good solderability and solder durability.

Abstract: A low-alloyed copper alloy suitable for use as a base material for a semiconductor includes 0.03 to 0.2% nickel by weight, 0.03 to 0.2% tin by weight; and 0.015 to 0.1% titanium by weight, the remainder being copper and common impurities.

Abstract: A silicon carbide-to-metal joint includes a thin layer of metal adherent to the ceramic material, a compliant layer of metal overlying the thin metal layer and a brazing alloy in contact with the metal to which the ceramic material is joined.A method for preparing a silicon carbide surface for joining by metallic brazing to a metal includes the steps of applying a thin layer of metal adherent to the ceramic surface followed by application of a compliant layer of metal.Also described is an easily brazable silicon carbide article which includes a silicon carbide substrate, a thin electrically conductive adherent metal layer overlying the substrate and a compliant metal layer overlying the thin metal layer.

Abstract: A device for the separation of slag and its retention in a tapping converter, such as used in the steel industry, consists of a closure having a specific gravity lower than that of the steel produced in the converter, but higher than that of the slag, provided with an elongated guide member depending from the closure, the tip portion of the guide member having a configuration including pockets for the molten steel and an exterior shape against which the molten steel flowing into the tap hole of the converter engages to accelerate and align the guide member and the closure into registry with the tap hole.

Abstract: Hot-dip zinc alloy coated steel products coated with a Zn-Al-Si-Mg alloy having a composition of between 3.5 and 5.0 wt % aluminum, between 0.02 and 0.5 wt % silicon, between 0.01 and less than 0.05 wt % magnesium, and remainder zinc with unavoidable impurities.

Abstract: The ductility and/or tensile strength of certain zinc-based alloys (25 to 40 wt. % aluminum, 0.5 to 5 wt. % copper, and up to 0.1 wt. % magnesium) are improved when various elements are added. A first series of improved alloys is comprised of boron (between 5 ppm and 0.1 wt. %), possibly along with titanium (25 ppm to 0.5 wt. %), or possibly along with zirconium and/or strontium (up to 0.1 wt. %), and titanium (up to 0.1 wt. %). A second series of improved alloys is comprised of rare earths, principally lanthanum and/or cerium, in a total amount between 5 ppm and 0.1 wt. %.

Abstract: A solder alloy which is particularly effective for use in automotive radiator applications comprises 87.5%-96.5% lead, 3%-10% tin, 0.5%-2.0% antimony, and 0-0.5% silver. The solder has high mechanical strength, is resistant to galvanic corrosion, and is readily solderable.

Abstract: A palladium alloy for use in making porcelain jacketed dental restorations having the following composition: 60-85 percent by weight palladium, 5-20 percent by weight copper, 3-15 percent by weight gallium, and a modifier metal selected from gold, indium, ruthenium, tin, nickel and mixtures thereof, the sum of the concentrations of the modifier metal percent in the alloy being greater than 5.5 percent by weight.

Abstract: A high strength titanium alloy capable of being used at elevated temperatures, the alloy containing 3.5-5.65% aluminium, 3.0-8.1% tin, with a total aluminium equivalent in the range 6.1-6.8%, 4.5-7.5% zirconium, 1.5-3% molybdenum, 0.2-0.6% silicon, balance titanium apart from incidental impurities, the alloy having good hardenability and having uniform hardenability throughout its depth, the alloy being weldable, resistant to crack propagation and having a good balance of properties suitable for use in applications requiring high strength at elevated temperatures.

Abstract: The installation permits continuous charging of solid material (2) such as steel scrap into a reaction vessel (1) such as a converter for steel manufacture, the steel scrap being heated by heat exchange with the gases (G) emitted from the converter. To this end, the scrap (2) is fed into a compartment (3) provided with a discharge opening placed above the mouth (6) of the converter (1) from which the hot gases (G) are emitted, the scrap (2) is displaced towards the discharge opening (5) and the hot gases (G) are aspirated so as to circulate through the scrap (2) in countercurrent flow with respect to the direction of displacement (D) of the scrap.

Abstract: The composite-wall panel or case structure comprises a wall formed by at least two shaped sheets 5, 6 which have regions in which confronting surfaces are in adjoining relation and interconnected by bonding or spot welding, and regions in which hollow bodies are formed between said confronting surfaces so as to impart a required rigidity to the structure. A method is disclosed for producing said panel or case structure. Application in the automobile industry.

Abstract: The present invention provides an apparatus useful in a cast lining process. In the cast lining process, a mandrel is positioned inside a vessel to be lined, so as to form a casting space, and a castable is delivered into the casting space to produce the cast lining. The novel apparatus of the present invention includes a rotatable and horizontally movable belt conveyor arranged above the casting space. The preferred apparatus also includes a contractable and expandable mandrel. Also provided by the present invention is an improved cast lining process.

Abstract: Plated metal parts, such as sealing lids for semiconductor packages, in which an iron-based alloy layer is electroplated with a first layer of nickel, a first layer of gold is electroplated on the first nickel layer, a second layer of nickel is electroplated onto the first gold layer and a second layer of gold is electroplated onto the second layer of nickel. The resultant plated parts exhibit higher salt atmosphere corrosion resistance than parts plated with a single nickel-gold set. Other metals can be used as the plating layers.