Abstract: A binary or higher order high-density thermodynamically stable nanostructured copper-tantalum based metallic system according to embodiments of the invention may be formed of: a solvent of copper (Cu) metal that comprises 70 to 100 atomic percent (at. %) of the metallic system; and a solute of tantalum (Ta) metal dispersed in the solvent metal, that comprises 0.01 to 15 at. % of the metallic system. The metallic system is thermally stable, with the absence of substantial gross grain growth, such that the internal grain size of the solvent metal is substantially suppressed to no more than about 250 nm at approximately 98% of the melting point temperature of the solvent metal and the solute metal remains substantially uniformly dispersed in the solvent metal at that temperature. Processes for forming these metallic systems may include: subjecting powder metals of solvent and the solute to a high-energy milling process using a high-energy milling device to impart high impact energies to its contents.

Abstract: In a reflow soldering apparatus, air heated by heaters is blown by fans onto a printed circuit board. Temperature controllers that control temperature of the heaters supply operation amount thereof to a calculation unit that calculates consumed electric energy of soldering apparatus. Inverters that control revolution of fans supply a value of current to the calculation unit. A control unit supplies a coefficient of the consumed electric energy to the calculation unit. The calculation unit calculates a total amount of consumed electric energy of the reflow soldering apparatus based on the operation amount, value of current and coefficient of the consumed electric energy thus obtained. A display unit displays on an operation screen the total amount of consumed electric energy of the reflow soldering apparatus, which has been calculated by the calculation unit.

Abstract: A solder joint may be used to attach components of an organic vapor jet printing device together with a fluid-tight seal that is capable of performance at high temperatures. The solder joint includes one or more metals that are deposited over opposing component surfaces, such as an inlet side of a nozzle plate and/or an outlet side of a mounting plate. The components are pressed together to form the solder joint. Two or more of the deposited metals may be capable of together forming a eutectic alloy, and the solder joint may be formed by heating the deposited metals to a temperature above the melting point of the eutectic alloy. A diffusion barrier layer and an adhesion layer may be included between the solder joint and each of the components.

Abstract: The present disclosure relates to the field of fabricating microelectronic packages, wherein magnetic particles distributed within a solder paste may be used to form a magnetic intermetallic compound interconnect. The intermetallic compound interconnect may be exposed to a magnetic field, which can heat a solder material to a reflow temperature for attachment of microelectronic components comprising the microelectronic packages.

Abstract: A system and method for joining curved surfaces such as pipes by obtaining pipes having additional rough stock material on the pipe ends, the rough stock material being precision machine processed to prepare complementary face profiles on each of the curved surfaces and then performing friction stir joining of the pipes to obtain a joint that has fewer defects than joints created from conventional welding.

Abstract: A method of joining, e.g., by fusion welding, titanium, and titanium-based alloys to ferrous metals, and the intermetallic weld pool created by practice of the method is described. The instant invention involves the use, inclusion or deployment of tantalum into the weld pool and upon cooling a weld, to create a surprisingly strong intermetallic bond, weld, or joint.

Abstract: A metal foil connection of first and second metal foils having a thickness of less than 0.05 mm includes a connecting point in which the metal foils are brazed to one another. The connecting point forms a wedge which is filled with brazing medium. A mass of the brazing medium, and a mass of sections of the metal foils which the brazing medium contacts in the wedge, have a given ratio. A honeycomb body, a brazing medium particle fraction and a method for manufacturing metal foil connections with a thickness of less than 50 micrometers, are also provided.

Abstract: A system for joining a pair of structural members having widely differing coefficients of thermal expansion is disclosed. A mechanically “thick” foil is made by dispersing a refractory metal powder, such as molybdenum, niobium, tantalum, or tungsten into a quantity of a liquid, high expansion metal such as copper, silver, or gold, casting an ingot of the mixture, and then cutting sections of the ingot about 1 mm thick to provide the foil member. These foil members are shaped, and assembled between surfaces of structural members for joining, together with a layer of a braze alloy on either side of the foil member capable of wetting both the surfaces of the structural members and the foil. The assembled body is then heated to melt the braze alloy and join the assembled structure. The foil member subsequently absorbs the mechanical strain generated by the differential contraction of the cooling members that results from the difference in the coefficients of thermal expansion of the members.

Abstract: A system for joining a pair of structural members having widely differing coefficients of thermal expansion is disclosed. A mechanically “thick” foil is made by dispersing a refractory metal powder, such as molybdenum, niobium, tantalum, or tungsten into a quantity of a liquid, high expansion metal such as copper, silver, or gold, casting an ingot of the mixture, and then cutting sections of the ingot about 1 mm thick to provide the foil member. These foil members are shaped, and assembled between surfaces of structural members for joining, together with a layer of a braze alloy on either side of the foil member capable of wetting both the surfaces of the structural members and the foil. The assembled body is then heated to melt the braze alloy and join the assembled structure. The foil member subsequently absorbs the mechanical strain generated by the differential contraction of the cooling members that results from the difference in the coefficients of thermal expansion of the members.

Abstract: A metal foil connection of first and second metal foils having a thickness of less than 0.05 mm includes a connecting point in which the metal foils are brazed to one another. The connecting point forms a wedge which is filled with brazing medium. A mass of the brazing medium, and a mass of sections of the metal foils which the brazing medium contacts in the wedge, have a given ratio. A honeycomb body, a brazing medium particle fraction and a method for manufacturing metal foil connections with a thickness of less than 50 micrometers, are also provided.

Abstract: A metal foil connection of first and second metal foils having a thickness of less than 0.05 mm includes a connecting point in which the metal foils are brazed to one another. The connecting point forms a wedge which is filled with brazing medium. A mass of the brazing medium, and a mass of sections of the metal foils which the brazing medium contacts in the wedge, have a given ratio. A honeycomb body, a brazing medium particle fraction and a method for manufacturing metal foil connections with a thickness of less than 50 micrometers, are also provided.

Abstract: The invention concerns a method whereby a soldering joint is applied on one of the surfaces of a collector plate (2, 3) before inserting the ends of the tube to be assembled thereto, in the form of a flexible adhesive previously perforated to correspond to the holes (20) of the plate.

Abstract: The present invention provides an oxide superconducting wire including a component provided in the form of a tape and a metal tape. The component in the form of a tape has an oxide superconducting member and a metal coating member formed mainly of silver and coating a surface of the oxide superconducting member. The metal tape, bonded in a heat treatment (e.g., fusion- or diffusion-bonded) to a surface of the component in the form of a tape, does not contain any superconducting material and it is formed mainly of silver and it also contains at least one component other than silver.

Abstract: Means of implementing production of an oxide superconductor joined member, excellent in electric current transmission performance, without a need of going through particularly complex steps, are provided. When joining together oxide superconductors by use of a solder composed of an oxide superconducting material, a finally solidified portion of the solder is positioned in a region where a transmission path of electric current flowing between oxide superconductor base materials as joined together is not obstructed by, for example, disposing the solder on a face of the oxide superconductor base materials, other than butting surfaces of the oxide superconductor base materials, so as to straddle both the base materials like bridge-building, or by, for example, shaping junction faces of the oxide superconductor base materials such that at least portions of the butting surfaces thereof are in the shape of sloped open faces, parting from each other.

Abstract: An end portion of each of two parts is machined and the machined end portion of the parts are arranged in facing positions to form a welding bevel extending in a longitudinal direction between the parts, whereafter a filler metal is deposited into the welding bevel. The welding bevel is a narrow bevel with side walls at an aperture angle of no more than 5° relative to the longitudinal central plane of the bevel. A nickel alloy comprising 18-32% of chromium is deposited into the welding bevel. The method is particularly suitable for joining a pressurized water nuclear reactor vessel tubing and an austenitic stainless steel primary circuit pipe.

Abstract: A method of applying a surface coating to a stator vane (1) of a gas turbine, the stator vane (1) comprising a platform (3) with an outer surface (4) connected to the stator of the gas turbine and an airfoil (2) connected to the platform (3), the method comprising the steps of each stator vane (1) is provided as a singlet, a base layer coating (7) affording resistance to oxidation is applied to surfaces of said stator vane (1) and said outer surface (4) of the platform (3) to be exposed to hot gases of the gas turbine, and a top layer coating (8) affording thermal resistance is applied to all coated surfaces of said stator vane (1) and the outer surface (4) of the platform (3), and welding the stator vanes (1) together, wherein a welding filler material (10) is placed between said walls of two adjacent platforms (3) of said stator vane (1), welding said singlets to one another at the margins of walls of said platform (3) to said welding filler material (10).

Abstract: In a method of brazing directionally solidified or monocrystalline components, the brazing deposit and the directionally solidified or monocrystalline component are moved through a heated zone. In this zone, the temperature applied by a heating system is greater than the liquidus temperature of the brazing alloy and less than the local incipient melting temperature of the component. A thermal gradient is applied between the component and the brazing deposit.

Abstract: An intravascular catheter carries a helical reinforcement member embedded within at least a portion of the tubular wall of the catheter. The helical reinforcement member comprises a helical first portion having coils of greater pitch than the pitch of helical coils of a second portion. Preferably, the catheter is for insertion into brain arteries, and comprises a flexible tube having an outer diameter of no more that about 0.05 inch, for example 3 French or smaller. The flexible tube defines outer and inner tubular layers. The inner tubular layer surrounds a catheter lumen and comprises chemically inert fluorinated polymer such as PTFE. The outer tubular layer comprises at least three longitudinally spaced, connected tubular sections. The sections are of successively increasing flexibility from the proximal toward the distal catheter end.

Abstract: Apparatus and method for butt-splicing hard-rolled and.backslash.or wide copper and copper alloy tapes employs a rolling electrode and varies the contact angle of the tape ends during soldering.

Abstract: A method of creating a weld joint between two metal members (B1, B2). The members have coincidentally configured abutting edges (E1, E2), first surface (1A, 1B) which are adjacent to and on one side of the edges, and second surfaces (2A, 2B) which are adjacent to and on the other side of the edges. The method includes chamfering the corners of the respective edges and first surfaces to create a generally V-shaped groove (4) between the first surfaces. A gasket (5) of weld filler material is placed between the edges. The gasket is held between the edges and extends both into the groove and outwardly beyond the second surfaces. The groove is next filled with additional weld filler material (7), and the gasket is then melted and fused with this additional material. The portion of the gasket extending outwardly beyond the respective second surfaces is melted and fused with the edges to form a smooth, continuous surface (8) with the second surfaces.

Abstract: The invention improves upon the diaphragm/beam-type transducers and method of manufacturing same described in U.S. Pat. No. 4,368,575. The new transducers and method of manufacture utilize strips or slivers of silicon or germanium which are larger than the individual strips used in the apparatus and method described in U.S. Pat. No. 4,368,575 by an amount sufficient to permit (a) the formation of two gages on each strip and (b) the forming of bonding pads on each gage. The bonding pads are formed on the gage strip before the strip is bonded to the beam, so that formation of the bonding pads and bonding of the strip to the beam can be handled automatically. The strips are mounted to one side of the midpoint of the beams, so that when a diaphragm/beam is deflected by application of a fluid pressure, one of the two gages will undergo a tension strain while the other gage will undergo a compression strain.

Abstract: A method of fabricating a metal pressure vessel for a metal oxide-hydrogen battery. A straight length of metal having a generally T-shape cross section is formed into circular configuration and the abutting ends of the strip are welded together to form a ring that includes a generally circular body portion and a flange or fin which projects radially outward from the body portion. The welded ring is expnded radially outward to precisely fit the open end of the shell of the vessel and the ring is then assembled with the open ends of the shell and head with the ends of the shell and head abutting the outwardly extending fin of the ring. The ends of the shell and head are then welded to the ring to complete the assembly.

Abstract: A thin metal foil or an array of fine wires or a graphite web, mat or the ke, having electrical conductivity was interposed between clean polished surfaces of ceramic parts which are to be joined, with application of pressure. A high current electrical discharge with very short duration puts so much energy into the conducting material that it explosively vaporizes and penetrates interacts with the ceramic before the ceramic can absorb an appreciable amount of heat and before the hot material can undesirably react with the surrounding atmosphere, so that an inert atmosphere is not necessary for the process. Metals that form silicides and/or carbides are for e.g. desirable for connecting SiC parts and conducting forms of carbon such as graphite are also suitable. Precoating the surfaces to be joined, with reactive or reaction-promoting material as well as a thermal treatment of the joint may be favorable.

Abstract: A partially consumable spacer chill ring for welding a pair of adjacent pipe ends together, includes a non-consumable, substantially annular, base metal ring having an outer surface with an outside diameter permitting a snug fit interiorly of the pipe ends to be welded, the non-consumable base metal ring being effectively continuous with at most a small transverse slit; and a consumable, substantially annular, filler metal spacer ring medially attached to the outer surface of the base ring and projecting radially outwardly therefrom, for spacing apart and for welding the pipe ends together by supplying filler metal from the consumable spacer ring to the weld during a first root pass of a welding operation, the consumable filler metal ring having, in cross-section, a radial leg extending extending medially with respect to and radially outwardly from the outer surface of the base metal ring, and two opposite, transverse legs extending on opposite sides of the radial leg and positioned on the outer surface of th

Abstract: A partially consumable spacer chill or welding ring includes a generally cylindrical non-consumable base metal ring having an outside diameter of such a size as to snugly fit the inside diameter of the pipe end to be welded. A circular consumable filler metal spacer ring is medially attached to the outer periphery of the base metal ring and extends peripherally radially outwardly to function as a spacing device between adjacent ends of two lengths of pipe to be joined. The consumable spacer ring may be affixed to the base metal ring in a plurality of circularly offset locations by spot welding or may be press-fitted in an alignment groove in the base ring. The consumable spacer ring becomes filler metal during welding.

Abstract: A welding ring is made as a flat ring body, of internal diameter equal to e internal diameter of the parts to be assembled and of outer diameter in excess of the external diameter of the parts to be assembled by the mount of a peripheral edge on each face of which are regularly distributed alternately six locating reliefs which are placed in abutment against the outer diameters of the parts to be assembled. A method of welding with such a ring is also described.

Abstract: The present invention relates to a method of wave soldering an assembly composed of a plurality of electrical conductors disposed on a surface of a sheet of insulating material. In accordance with this method, the surface of the sheet and the conductors are contacted with a stationary wave of molten solder having a polyether admixed therewith and floating on the surface thereof. The polyether is a heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide. It is preferred that the alkylene oxide contain 2 to 4 carbon atoms. The alkylene oxide may be all ethylene oxide or may be a mixture with other lower alkylene oxides such as propylene oxides and butylene oxides. In any event, the copolymer should contain at least about 20 percent by weight of oxyethylene groups, balance oxypropylene groups and/or oxybutylene groups. A conventional polymeric oxidation inhibitor may also be included.

Abstract: A method of manufacturing a passive hermetically sealed electronic component having a coupling element of soft alloy material between the component element and the leads for providing strain relief. The component element is composed of a passive element having coated ends composed of a refractory metallic material for providing reliable electrical and mechanical connection to the coupling element.

Abstract: Metallic tape is butt spliced, i.e. without overlapping the tape, by measuring a fine strip of silver solder into a gap between the cut edges of the lengths of tape being spliced in such a manner that the strip of solder extends over one of the lengths and under the other. The area being spliced is pressed between carbon electrodes and the silver solder is fused by the passage of resistance current.