Abstract: A method of coupling two ceramic matrix composite components comprises procuring a first ceramic matrix composite component, procuring a second ceramic matrix composite component, and applying a melt alloy between the first and second ceramic matrix components. The melt alloy comprises a homogeneous mixture of two or more materials in powder form, where the two or more materials include a braze alloy comprising silicon and a high melting point material or alloy. The first and second ceramic matrix composite components and the melt alloy are heat treated to a temperature, and the temperature is maintained for a length of time, followed by cooling, thereby coupling the first and second ceramic matrix composite components.

Abstract: A manufacturing method of heat conductive device for an LED has steps of forming a heat sink and an engagement recess in the heat sink by cold forge, punching a heat-conducting disc to form an LED carrier having a mounting portion and a heat-conducting wall formed around the mounting portion, soldering multiple LEDs on the LED carrier, and heating the heat sink to thermally expand the heat sink and assembling the LED carrier and the heat sink so that the heat-conducting wall is assembled with the engagement recess and further chilling the heat sink to thermally retract and tightly hold the LED carrier. The manufacturing method increases contact area and reduces air gaps between the LED carrier and the heat sink to effectively enhance the heat-conducting efficiency of the LED carrier so that the LEDs are operated at a suitable operating temperature to secure a prolonged life duration.

Abstract: In a method of manufacturing an article (28) by diffusion bonding and superplastic forming stop off material (122) is applied to prevent diffusion bonding in a predetermined pattern on a first surface (106) of a first metal workpiece (100) and the predetermined pattern is spaced from the edges of the first surface (106) of the first metal workpiece (100). Stop off material (124) to prevent diffusion bonding is applied in a predetermined position on the first surface (106) of the first metal workpiece (100) and the predetermined position extends from the predetermined pattern of stop of material (122) on the first surface (106) of the first metal workpiece (100) towards one edge of the first surface (106) of the first metal workpiece (100).

Abstract: A method of forming clad piping or tubing includes the steps of forming an assembly of a support billet having a cladding surface and a cladding material billet, sized to cooperate with the cladding surface of the support billet, with an interface gap defined between the cladding material billet and the cladding surface of the support billet, sealing the interface gap, evacuating the interface gap and metallurgically bonding the cladding material billet to the support billet by a Hot Iso-static Pressing or weld overlay process to form a composite billet, and hot-rolling through a rotary mill the composite billet to form the clad piping or tubing.

Abstract: A method of forming clad piping or tubing includes the steps of forming an assembly of a support billet having a cladding surface and a cladding material billet, sized to cooperate with the cladding surface of the support billet, with an interface gap defined between the cladding material billet and the cladding surface of the support billet, sealing the interface gap, evacuating the interface gap and metallurgically bonding the cladding material billet to the support billet by a Hot Iso-static Pressing process to form a composite billet; and hot-rolling through a rotary mill the composite billet to form the clad piping or tubing.

Abstract: In a soldering method for mounting a semiconductor device on a wiring board, a plurality of solid-phase solders are provided between the semiconductor device and the wiring board, and are thermally melted to thereby produce a plurality of liquid-phase solders therebetween. A constant force is exerted on the liquid-phase solders by relatively moving the semiconductor device with respect to the wiring board so that an invariable gap is determined between the semiconductor device and the wiring board.

Abstract: The invention relates to a method of protecting equipment intended to operate at high temperature in the presence of a fluid containing at least one hydrocarbon and/or carbon monoxide against corrosion by metal dusting, method in which pieces of the equipment are made from an alloy containing nickel, iron, chromium and/or aluminum, and in which said pieces of the equipment are protected from said corrosion by a protective coating. This method is characterized in that said equipment pieces protected in this way are connected to each other by means of joining pieces, said joining pieces being protected beforehand by a protective coating over at least part of their surface intended to be brought into contact with said fluid at high temperature, and in that each of the connections intended to be subjected to said corrosion is produced by external welding of the ends of the joining piece with said pieces of equipment.

Abstract: A method of joining expandable tubulars includes joining the tubulars by forge welding and flushing a reducing flushing gas around the heated tubular ends during at least part of the forge welding operation such that oxides are removed from the forge welded tubular ends and the amount of irregularities between the forge welded tubular ends is limited.

Abstract: Electronic packages with uninsulated portions of copper circuits protected with coating layers having thicknesses that are suitable for soldering without fluxing and are sufficiently frangible when being joined to another metal surface to obtain metal-to-metal contact between the surfaces.

Abstract: A Coriolis flowmeter having a single flow tube surrounded by connecting rings and a balance bar whose ends are connected by the connecting rings to the flow tube. The balance bar has a thermal coefficient of expansion greater than that of the connecting rings and the flow tube. The outer circumferential surface of each connecting ring is tapered toward the axial center of the flow tube. The inner circumferential surface of the balance bar has a taper matching that of the connecting ring. The connecting ring can only be partially inserted into the space between the flow tube and the balance bar when the assembly is at room temperature. Braze material is then applied to the visible ends of the surface common to the balance bar and the connecting rings as well as to the ends of the surface common to the connecting rings and the flow tube. The structure is heated to brazing temperature to braze these common surfaces.

Abstract: For the purpose of contact-connecting an electrical component, in particular a semiconductor component, on a substrate having a conductor structure, a joining temperature is chosen in such a way that the substrate, with a pressure being exerted on the electrical component, experiences a plastic deformation, with the result that the electrical component is pressed together with the conductor structure into the substrate in a positively locking manner. In order to produce the connection between the component and the substrate, use is preferably made of a thin diffusion solder layer which can be processed at temperatures lying below the melting point of the substrate.

Abstract: The invention provides a friction stir welding apparatus and method and a processing apparatus and method, which are not easily affected by deformations of a work being processed. The friction stir welding apparatus inserts a rotating tool into the work and moves the rotating tool relative to the work to join members of the work. The friction stir welding apparatus and method and the processing apparatus and method of the invention, the latter cutting or grinding the work with a rotating cutter or grindstone, comprises controlling a relative distance between the tool, cutter or grindstone and the work under the joining or processing operation or an insertion depth so that the load factor or electric current of a spindle motor for rotating the tool, cutter or grindstone is within a predetermined range, and a controller therefor.

Abstract: An x-ray imaging apparatus having an anode stem assembly with explosion-bonded joints is provided. Explosion-bonding the components of an anode stem assembly to one another provides a hermetic seal with increased reliability as well as reducing the anode stem's susceptibility to thermal and/or mechanical induced fracture. By eliminating the need for brazing and/or welding material within the anode stem, the present invention also provides an anode stem with increased heat transfer capabilities. Further, providing explosion-bonded joints creates a simple joint microstructure absent any voids and temperature-induced phases not previously present in the anode stem materials.

Abstract: A method of manufacturing a fiber reinforced metal disc comprises forming an annular groove in an axial face of a first metallic ring. A plurality of metal coated fibers are arranged in spiral preforms and a plurality of metallic wires are arranged in spiral preforms. The metal coated fiber preforms and the metallic wire preforms are arranged in the groove. An annular projection is formed on an axial face of a second metallic ring. The annular projection on the second metallic ring is aligned with the annular groove in the first metallic ring. Heat and pressure is applied to axially consolidate the metal coated fiber preforms and metallic wire preforms and to bond the first metal ring, the second metal ring, and the preforms to form a unitary composite disc. The use of metal coated fibers and metallic wires allows the mechanical properties to be tailored.

Abstract: A heating furnace tube, a method of using the same and a method of manufacturing the same which have been developed with a view to eliminating inconveniences occurring when a carbon-containing fluid is made to flow in the heating furnace tube. The heating furnace tube which comprises a rare earth oxide particle distributed iron alloy containing 17-26 wt. % of Cr and 2-6 wt. % of Al. The method of manufacturing this heating furnace tube which comprises the steps of forming or inserting an insert metal on or into at least one of a joint end portion of one heating furnace tube element and that of the other heating furnace tube element, bringing these two joint end portions into pressure contact with each other directly or via an intermediate member, and diffusion welding the two heating furnace tube elements to each other by heating the insert metal.

Abstract: An apparatus and method for joining two or more vehicle components together to form a joint in a vehicle body and frame assembly is disclosed. The frame assembly can include a pair of longitudinally extending side rails having a plurality of transverse cross members extending therebetween. At least one of the side rails includes a portion that is deformed inwardly to define a mounting projection that is sized to receive an end of one of the cross members therein. The mounting projection is preferably formed having a first relatively large diameter portion that is somewhat larger in diameter than the outer diameter of the end of the cross member and a second relatively small diameter portion that is only slightly larger in diameter than the outer diameter of the end of the cross member. An internal magnetic pulse welding inductor assembly is inserted within the cross member to generate an intense electromagnetic field.

Abstract: A configuration for forming a gastight space is prevented from being projected from a housing, so that a projection is not formed on the housing. A sealed contact device includes a housing including a container body having an opening end portion, the container body being made of ceramics, a metal lid connected to the opening end portion to form a gastight space, a stationary contact and a movable contact disposed in the container body, and a sealed vent portion formed in the metal lid, in which the sealed vent portion is formed by sealing a vent hole formed in the metal lid after exhausting a gas in the gastight space and supplying a desired gas into the gastight space, via the vent hole.

Abstract: The disclosure is for a method of installing a heat pipe within another structure. A completely processed heat pipe is coated with solder and inserted into a cylindrical hole within the structure with sliding clearance. The casing of the heat pipe is then expanded into tight contact with the surrounding hole by heating the heat pipe and expanding the heat pipe casing with the heat pipe's own internal vapor pressure. The application of heat also simultaneously melts the solder to bond the heat pipe into the hole.

Abstract: A multilayer composite tubular structure for use as a stent in surgical procedures has an outer layer of biocompatible material, a middle layer of radiopaque material, and an inner layer of biocompatible material. The layers are metallurgically bonded, to form a composite stent which is ductile and permits large deformation without delamination between the biocompatible and radiopaque layers. The composite structure formed is visible on a fluoroscope, yet does not obstruct the details of the stent itself, or of the anatomical features surrounding the stent.A process of forming a multilayer composite tubular structure is also disclosed. A tube formed from radiopaque material is coaxially surrounded by a tube of biocompatible material. The tubes are simultaneously reduced, such as by tube drawing, swaging, or deep drawing, until a composite structure of a desirable diameter and wall thickness is formed. The tubes are then heat treated to cause diffusion bonding of the biocompatible and radiopaque layers.

Abstract: A method is used to bond dissimilar metals, such as for an x-ray tube. Copper and steel tubular components are provided. An interlayer material situated between the metal layers is used to bond the copper and steel tubular components by solid state diffusion process. The interlayer material may be pure nickel, pure copper, or a layered combination of nickel and copper or copper alloy. The use of the low cost interlayer material and the solid state diffusion process yields a strong bond between the dissimilar metals.

Abstract: A cooling drum can continuously cast a favorable band-shaped cast piece having little thermal deformation. The cooling drum comprises a three-layer structure including a rigid member, a cooling member metallurgically bonded to the outside of the rigid member, and a heat-resistance member plated by electro-deposition on the outer circumferential surface of the cooling member. The rigid member is made of austenite group stainless steel, the cooling member is made of Cu or Cu-alloy, and the heat-resistance member is made of either Ni or its alloy or Co or its alloy.

Abstract: A seamless double-walled metal tube which has an outer wall composed of steel having a face-centered cubic grain structure, an inner wall concentrically disposed within the outer wall, the inner wall composed of a steel having a face-centered cubic grain structure, the inner wall having an outerwardly oriented surface directed toward an inwardly oriented surface of the outer wall. The seamless double-wall metal tube also has an intermediate bonding metal region interposed between and metallurgically bonded to the inner wall and the outer wall. The intermediate bonding region is composed of a metal capable of metallurgically bonding with the inner wall and the outer wall.

Abstract: A small thick-walled composite metal fuel injection tubing for a diesel engine, for example, is manufactured from an outer carbon steel pipe, and an inner stainless steel pipe press-fitted in the large diameter carbon steel pipe by drawing. The press-fitted mating surfaces of the inner and outer pipes are metallurgically and integrally bonded together by heat-treating. As a result, at least an inside wall surface of the inner stainless steel pipe has a diffused layer of at least one kind of metal, or an alloy of two or more kinds ,of metals in combination, selected from the group consisting of Ni, Cr, Mo, Co, Al and Cu.

Abstract: This invention relates to a method for producing bi-metallic tubing wherein a layer (3,31) of a first metal is metallurgically bonded to the exterior surface of a core component (1,29) of a second metal incompatible for solid state bonding with the first metal by processes other than explosive bonding, the resulting cylindrical bonded composite (15,25) is placed within the bore of a thick-walled tube (33) of a metal compatible for solid state bonding with the first metal and the assembly (39) is heated and expanded by passing it over a profiled mandrel (43). In passing over the mandrel sufficient pressure is developed at the interface between the bonded composite and the thick-walled tube to form a metallurgical bond at the interface. When the first metal is the same as the metal of the thick-walled tube the interface is eliminated and a bi-metallic tube consisting of a single outer layer of the first metal with a bonded lining of the second metal is produced.

Abstract: A method of manufacturing a high pressure fluid supply pipe of a double pipe structure in which an outer pipe is tightly fit over the outer circumference of an inner pipe, wherein the method comprises a step of forming a double pipe by tightly fitting an inner pipe with an outer pipe having a thermal expansion coefficient greater than that of the inner pipe while putting a brazing material therebetween, and a step of subjecting the double pipe to a heat treatment and then to a gradual cooling treatment to join and tightly fit the inner pipe and the outer pipe integrally to each other, thereby providing at least the inner surface of the inner pipe with a compressive residual stress. The resistance to high inner pressure can be improved and destructive strength, in particular, fatigue resistance to the repeated inner pressure can remarkably be improved.

Abstract: A method of making a composite tubular product which comprises inner and outer tubes of different chemical compositions and in which the stresses produced at the interface between the outer and inner tubes during cooling from a diffusion bonding temperature are such that the interface between the two tubes remains intact during such cooling. The method comprises the step of inserting into the interior of the inner tube a core of a material whose transformation and/or contraction characteristics are sufficient to counteract at least to a substantial amount interfacial stresses which arise during cooling because of differences in the transformation and contraction properties of different materials from which the inner and outer tubes of the composite product are formed.

Abstract: The method according to the invention relates to the production of a bimetallic tube, the cross-section of which comprises an outer annular zone and an inner annular zone, these zones being of different compositions. The method resides in preparing a blank (1) comprising two tubular components (2, 3) housed one inside the other and of different compositions and separated by an annular space (4) which is filled with divided metal. The whole assembly is made rigid by two end pieces (7, 8) and coextrusion is carried out at a suitable temperature to ensure a metallurgical bond between the inner component (2) and the outer component (3). The bimetallic tube obtained is particularly suitable for uses in which one of its two outer or inner walls is exposed to a medium which is more aggressive than the other.

Abstract: A method of cladding the ends of a length of previously clad pipe with a clad of greater thickness than the clad for the balance of the length in order to allow for threading, including the steps of boring, facing and turning the end of the pipe, plating by electroless deposition the faying surfaces of a nickel-base alloy cladding cylinder, assembling the cylinder to the length of pipe, assembling a close fitting tooling mandrel on the inside of the cladding cylinders, the tooling mandrel being made of a metal possessing a higher coefficient of thermal expansion than does the pipe, placing the subassembly within a housing having an induction coil therein, evacuating the housing atmosphere and back filling with an inert gas such as argon, heating the subassembly to about 1650.degree. to 2100.degree. F.

Abstract: A method is provided for repairing by solid state diffusion a damaged portion of an inner surface of a hole of a metal part. The method comprises machining the hole to a cylindrical diameter sufficient to remove the damaged portion therefrom and provide a new hole with a smooth finish into which a metal bushing is inserted, the outer diameter being of size and finish relative to the machined diameter of the hole to provide a close fit therewith, the composition of the metal bushing being compatible with that of the metal part. A cylindrical metal mandrel of diameter corresponding to the inner diameter of the bushing is inserted into the bushing to provide an assembly thereof with the metal part, the metal mandrel having a mean coefficient of thermal expansion greater than that of the metal bushing for a selected solid state diffusion temperature sufficient to provide pressure against the bushing.

Abstract: The present invention provides a process for producing a clad plate which comprises a first step of forming a coil by taking up two or more metal sheets as clad materials and a thin sheet of heat-resistant steel which works as a separator material while these members are overlaid on one another and a second step of vacuum heat-treating the resultant coil.

Abstract: A method of joining titanium to a dissimilar metal wherein a predetermined amount of heat and pressure is applied sufficient to plastically deform only one of the metals being joined. The heat and pressure combine to flow one metal into shaped surfaces existing in the second metal, maintain the joint in compression through differrential thermal expansion and bonding the deformed metal to the other metal. The method uses a temperature sufficiently low to effect bonding without any chance for the formation of excessive brittle intermetallic phases.

Abstract: Fabrication of the test structure is functionally illustrated in FIG. 9. More specifically, the first step in the process is to machine the cavity 40 in the third body of austenitic material 42, as functionally illustrated at reference numeral 80. After the cavity 40 has been machined, the fault sample 34 is installed into the cavity by heating the third body of austenitic material 42 and cooling the fault sample 34. This process is functionally illustrated at reference numeral 82. After installation of the fault sample 34, the interface is welded to seal the junction and the combined structure HIP bonded, as functionally illustrated at Reference Numerals, 84 and 86. After bonding the test structure is machined into the desired configuration, as functionally illustrated at Reference Numeral 88.

Abstract: In order to secure electronic components, and particularly large-area power semiconductors, to a substrate, first a paste formed of metal powder and a solvent is applied in the form of a layer to a contacting layer of the component and/or a contact surface of the substrate. The layer of paste is then dried. When the paste has dried, the component is placed onto the substrate, whereupon the entire arrangement is heated to a relatively low sintering temperature preferably between 180.degree. C. and 250.degree. C., and with simultaneous application of a mechanical pressure of at least 900 N/cm.sup.2. A connection which is thus achieved by such a pressure sintering at relatively low sintering temperatures is particularly suitable for securing power semiconductors produced in MOS-technology to a substrate.

Abstract: A method of manufacturing an externally clad tubular product employing a tubular host such as steel, including the steps of plating the external surface of the tubular host with a low melting point bonding metal alloy, assembling a tubular clad member, such as a nickel base alloy, over the plated tubular host, circumferentially welding one end of the cladding member to one end of the host member and welding the other ends in such a manner as to incorporate a metallic gas reservoir, thus forming a subassembly. The annular space formed in the subassembly between the interior of the cladding member and the exterior of the tubular host is evacuated of water vapor and oxygen. The evacuated subassembly is heated to about 1650.degree. to 2100.degree. F. thereby melting the bonding metal alloy, and the heated subassembly hot rolled to metallically bond the cladding member to the tubular host by means of the mechanism of liquid interface diffusion bonding.

Abstract: A method of manufacturing an internally clad tubular product employing a tubular host such as steel, including the steps of plating the internal surface of the tubular host with a low melting point bonding metal alloy, inserting a tubular cladding member, such as of nickel base alloy, into the plated tubular host, circumferentially welding one end of the cladding member to one end of the host member directly and welding the other ends in such a manner as to incorporate a metallic gas reservoir, thus forming a subassembly, evacuating the annular space formed in the subassembly between the exterior of the cladding member and the interior of the tubular host of water vapor and oxygen, assembling a close-fitting full-length tooling mandrel of high thermal expansion material inside the subassembly, heating the subassembly to about 1650.degree. to 2100.degree. F.

Abstract: A method of manufacturing an internally clad tubular product employing a cylindrical host formed such as of a first nickel base alloy including the steps of plating the internal surface of the host with a low melting point bonding metal alloy, inserting a cylindrical cladding member, such as of a second nickel base alloy, into the plated cylindrical host, circumferentially welding one end of the cladding member to one end of the host member directly and welding the other ends in such a manner as to incorporate a metallic gas reservoir, thus forming a subassembly, evacuating the annular space formed in the subassembly between the exterior of the cladding member and the interior of the cylindrical host of water vapor and oxygen, heating the subassembly to about 1650.degree. to 2200.degree. F. thereby melting the bonding metal alloy, and hot extruding the heated subassembly to metallically bond the cladding member to the cylindrical host by means of the mechanism of liquid interface diffusion bonding.

Abstract: A method and arrangement for the positioning and bonding of a solid body (2), in which one part of the solid body (2) together with the bonding agent (6) is to be attached to a further element (7) and bonded to a base (4) is to be capable of positioning the solid body (2), at the point attained from positioning, with both high precision and high long term stability. The solid body (2) is immersed in the bonding agent (6) and this bonding agent is in turn located in a groove of a further electrically conducting body (7). The further body (7) is heated by current flow to a temperature at which the solid body (2) is movable within the bonding agent. Upon attaining the desired positioning of the solid body (2), the bonding agent is allowed to cool through controlled reduction of the heating current until solidification occurs.

Abstract: Disclosed is a method and apparatus for forming a cold weld joint between parts comprising a sleeve (or coupling) to receive the ends of conductors (or pipes). The sleeve is provided with weld pads which when the sleeve cools will engage one of the conductors and be cold welded thereto by the forces of shrink fit. Serrations are provided for axial strength of the joint and to limit the plastic flow of the material of the pads. A second conductor is loosely telescoped in the sleeve by bellows for compensating for any misalignment when the parts are initially brought together. Later the bellows is provided with a backing material to rigidly connect the second conductor to the sleeve.

Abstract: A bimetallic electrical terminator, formed from aluminum and copper members and having a hot pressure bond lock between its members is disclosed. A method for forming such a terminator is also disclosed. The bimetallic electrical terminator may be used within a separable connector to interconnect two branches of a high voltage electrical network. The bimetallic terminator has a low electrical resistance and a high mechanical strength between its aluminum and copper members.

Abstract: A method of fabricating a hybrid dual property wheel assembly includes the steps of preforming a bladed ring of a highly solidified alloy material including a base with a large diameter central opening therethrough and thereafter supporting a metal disc therein to form front and rear joint lines on either side of the juncture between the bladed ring and the disc. The method further contemplates direction of radio frequency energy to the disc to cause it to thermally expand into radially pressed contact with the inside diameter of the bladed ring at an interface therebetween while maintaining the disc and bladed ring under a continuous vacuum atmosphere and heated by the radio frequency energy for maintenance of a diffusion bond temperature between the expanded disc and the surrounding bladed ring of the wheel assembly to form a metallurgical connection therebetween by metal growth across the interface.

Abstract: A method of bonding a laminated porous sheath to a cast strut includes the step of performing a compressible pad to have a plurality of closely spaced grooves on one surface thereon and a plurality of spaced apart lands on the opposite face thereof; locating a preformed porous laminate sheath over the outer surface of a cast strut and laser welding it thereto and thereafter assembling the preformed compressible pad to locate the plurality of grooves thereon in overlying relationship to a plurality of airflow openings in the porous laminated sheath and with ribs on either side of the grooves being located in juxtaposed relationship with the outer surface of the porous laminated sheath for uniformly distributing a load thereto; locating the preassembled casting, sheath and compressible pad within a contoured opening formed by a three piece pressure block fixture and applying a predetermined pressure to the assembled parts while subjecting them to a predetermined bond temperature while applying a vacuum.

Abstract: A laminate tube structure produced by stretch reducing, in combination, a pair of tubes. The resultant tube structure is particularly adapted for use as a mandrel for supporting a piercing point of a seamless-tube mill.