2156 results about "Brazing" patented technology

A chamber material made of Al alloy excellent in thermal cracking resistance and chemical and/or physical corrosion resistance and capable of reducing contamination excellently and further having excellent and wide applicable brazing property in a high temperature corrosive circumstance, in which the substrate aluminum material for the chamber material made of Al alloy having an anodized film comprises 0.1 to 2.0% Si, 0.1 to 3.5% Mg, 0.02 to 4.0% Cu on the mass % basis and the balance of Al and impurity element with Cr in the impurity elements being less than 0.04%. Preferably, Fe is 0.1% or less and Mn is 0.04% or less in the impurity element and, further, the total sum of impurity elements other than Cr and Mn being restricted to 0.1$ or less. This invention can be utilized suitably to various materials used in high temperature corrosive circumstance, particularly, in high temperature corrosive gas or plasma atmosphere.

The present invention discloses a CMP pad dresser which has a plurality of uniformly spaced abrasive particles protruding therefrom. The abrasive particles are super hard materials, and are typically diamond, polycrystalline diamond (PCD), cubic boron nitride (cBN), or polycrystalline cubic boron nitride(PcBN). The abrasive particles are brazed to a substrate which may be then coated with an additional anti-corrosive layer. The anti-corrosive layer is usually a diamond or diamond-like carbon which is coated over the surface of the disk to prevent erosion of the brazing alloy by the chemical slurry used in conjunction with the CMP pad. This immunity to chemical attack allows the CMP pad dresser to dress the pad while it is polishing a workpiece. In addition to even spacing on the substrate, the abrasive particles extend for a uniform distance away from the substrate, allowing for even grooming or dressing of a CMP pad both in vertical and horizontal directions. A method of producing such a CMP pad dresser is also disclosed.

A cutting element and a method for forming a cutting element is described and shown. The cutting element includes a substrate, a TSP diamond layer, a metal interlayer between the substrate and the diamond layer, and a braze joint securing the diamond layer to the substrate.

Tools for conditioning chemical mechanical planarization (CMP) pads comprise a substrate with abrasive particles coupled to at least one surface. The tools can have various particle and bond configurations. For instance, abrasive particles may be bonded (e.g., brazed or other metal bond technique) to one side, or to front and back sides. Alternatively, abrasive particles are bonded to a front side, and filler particles coupled to a back side. The abrasive particles can form a pattern (e.g., hexagonal) and have particle sizes that are sufficiently small to penetrate pores of a CMP pad during conditioning, leading to fewer defects on wafers polished with the conditioned CMP pad. Grain bonding can be accomplished using brazing films, although other metal bonds may be used as well. Also, balanced bond material (e.g., braze on both sides) allows for low out-of-flatness value.

This invention provides a small diameter snare device consisting of a hollow, elongate, thin-walled polymer outer sheath. A single central core wire extends through the entire length of the sheath. The outer diameter of the core wire is sized close to the inner diameter of the sheath while allowing for axial sliding, in order to maximize the support to the body portion of the snare device. The distal end of the core wire has a tapered section of reduced diameter or cross section to provide a “guidewire-like” flexibility to the distal portion of the device. A second wire of about fifty percent of the inner diameter of the sheath is shaped to form a snare loop and the two ends are attached to the distal most portion of the central core wire via welding, soldering, or brazing. After assembly of the core and sheath, a second short, hollow tube is fitted over the proximal end of the central core and attached thereto to provide an actuating handle to slideably move the central core within the sheath, thus exposing and retracting the snare loop from the open distal end of the sheath. The loop is typically circular or oval shaped and can also be multiplanar (for example, a twisted, figure eight shape) so as to increase the ability to ensnare and capture objects. The loop attachment to the core wire is facilitated and strengthened by a wrapped coupling coil formed typically of 0.001-inch platinum wire applied to secure the loop prior to soldering (brazing or other metal-flowing joining techniques), and through which solder flows to permanently secure the loop to the core wire.

The present invention a high strength aluminium alloy brazing sheet, comprising an Al—Zn core layer and at least one clad layer, the core layer including the following composition (in weight percent):

optionally one or more of:

the balance aluminium and incidental elements and impurities. The clad layer includes an Al—Si based filler alloy and is applied on at least one side of the core layer. The invention relates furthermore to a brazed assembly including such brazing sheet, to the use of such brazing sheet and to method for producing an aluminium alloy brazing sheet.

The invention discloses flexible composite middle layer brazing alloy and a method of utilizing brazing ceramic and metal, and relates to the composite brazing alloy and the method of utilizing the brazing ceramic and metal. The flexible composite middle layer brazing alloy and the method aim at solving the problems that the conventional method is high in cost and the forming of brittle compound of a joint can not be restrained. The flexible composite middle layer brazing alloy is prepared from upper layer brazing alloy, a flexible middle layer and lower layer brazing alloy. The brazing method comprises the steps of: cleaning greasy dirt and impurity on a pre-welding surface; processing the upper-layer brazing alloy, the flexible middle layer and the lower-layer brazing alloy into small sheets; and ultrasonically cleaning and airing ceramic to be welded, metal to be welded, the upper layer brazing alloy, the flexible middle layer and the lower layer brazing alloy by acetone, assembling a workpiece to be welded, and putting the workpiece to be welded into a vacuum heating furnace to braze. According to the method disclosed by the invention, the operation is simple; the residual stress of the joint is released by adding the flexible middle layer; and the forming of the brittle compound of the joint is restrained, and the shearing strength of the joint is improved by 30-109%. The method disclosed by the invention is used for brazing the ceramic and the metal.

A semiconductor light emitting device package includes a substrate with a core and a copper layer overlying the core. The light emitting device is connected to the substrate directly or indirectly through a wiring substrate. The core of the substrate may be, for example, ceramic, Al₂O₃, AlN, alumina, silicon nitride, or a printed circuit board. The copper layer may be bonded to the core by a process such as direct bonding of copper or active metal brazing.

According to one aspect of the invention a robust anode structure and methods of making and using said structure to produce ionizing radiation are disclosed. An ionizing radiation producing layer is bonded to the target side of a highly conductive diamond substrate, by a metal carbide layer. The metal carbide layers improves the strength and durability of the bond, thus improving heat removal from the anode surface and reducing the risk of delaminating the ionizing radiation producing layer, thus reducing degradation and extending the anode's life. A smoothing dopant is alloyed into the radiation producing layer to facilitate keeping the layer surface smooth, thus improving the quality of the x-ray beam emitted from the anode. In an embodiment, the heat sink comprises a metal carbide skeleton cemented diamond material. In another embodiment, the heat sink is bonded to the diamond substrate structure in a high temperature reactive brazing process.

The present invention relates to multiple layer aluminum brazing sheet having a core, a braze cladding, and an interliner therebetween that, when fabricated in the fully annealed condition (O-temper), forms a continuous and dense dispersoid band in the core in addition to having an additional sacrificial layer for exceptional post brazed corrosion resistance. This present invention also relates to the process used to fabricate these alloys.

A process for repairing a turbine component comprises overlaying a preform of a brazing material onto a surface of the turbine component, wherein the surface comprises a damaged portion; securing the preform of a brazing material to the surface; and heating the turbine component to a temperature effective to form a brazed joint between the brazing material and the turbine component. Also disclosed is a repaired turbine component repaired by the process.

The present invention relates to a diamond tool and a method of manufacturing the same, wherein multiple abrasive layers are formed through a brazing or electroplating method, thereby improving the performance and service life of the tool. According to the method of the present invention, a plurality of concave portions are formed in a surface of the shank. A bonding paste is coated into the concave portions and abrasives are dispersed in the bonding paste to thereby form a lower abrasive layer. Again, a bonding material is coated on the lower abrasive layer and abrasives are dispersed in the bonding material to thereby form an upper abrasive layer. Then, a heat treatment is executed to fusion-bond the bonding material and abrasives onto the surface of the shank. Therefore, the diamond tools manufactured through a multiple brazing or electroplating method according to the invention can significantly extend the service life thereof, which has been a detrimental weakness of the conventional diamond tools having a single abrasive layer, in spite of various advantages of the brazing and electroplating methods. Furthermore, multiple abrasive layers can be formed inside the concave portions having a desired spacing, width and depth, thereby significantly improving the service life and the cutting performance of diamond tools.

A multi-layer aluminum brazing sheet including a core layer, interliner, braze clad layer and a sacrificial layer, in which the post-braze strength of the brazing sheet is optimized by controlling the manganese (Mn), silicon (Si), copper (Cu) and magnesium (Mg) contents of the core layer and the Mn, Si and Cu content of the interliner and the Mn, Si and Zn content of the sacrificial layer and the specifics of the braze thermal cycle. The brazing sheet maintains corrosion resistance, while optimizing post-braze strength, by utilizing 0.5 wt. % to 1.2 wt. % Cu in the interliner. Further, the interliner and sacrificial layer of the brazing sheet contain low or no magnesium to maintain the brazing sheet's braze-ability.

A member (12A) for use in an electronic circuit has a thermally conductive layer (22) mounted on a heat sink (20). The thermally conductive layer (22) comprises an insulating substrate (24), a first joint member (26) joining the insulating substrate (24) to the heat sink (20) and containing an active element, a second joint member (28) disposed on the insulating substrate (24), and an electrode (30) disposed on the second joint member (28). The insulating substrate (24) comprises an AlN layer or an Si3N4 layer. Each of the first and second joint members (26, 28) is made of a hard brazing material containing an active element. The heat sink (20) is made of an SiC/Cu composite material or a C/Cu composite material.

In a nonaqueous electrolyte battery, a negative electrode terminal is fixed to an insulating ceramic material with filler materials for brazing mainly composed of copper and insulation-sealed to an opening of a metallic exterior member with the ceramic material being provided interposed therebetween. A positive electrode terminal fixed to an insulating ceramic material with an aluminum alloy-based filler materials for brazing and insulation-sealed to the opening in the metallic exterior member.

A method of fabricating a machine component is provided. The method includes preparing at least a portion of a surface of a machine component for receiving a sintered preform. The method also includes forming a pre-sintered preform hybrid hardface mixture that includes combining a predetermined portion of at least one hardfacing material with a predetermined portion of at least one brazing material. The method further includes forming a pre-sintered preform. The pre-sintered preform has predetermined dimensions. The method also includes forming the sintered preform and positioning the sintered preform on the machine component. The method further includes fixedly coupling the sintered preform to at least a portion of the machine component via brazing.

A feed-through assembly for an IMD and a method for fabricating the same are provided. The feed-through assembly has a ferrule having a first aperture disposed therethrough. An insulating member is disposed at least partially within the first aperture. The insulating member has a second aperture, an inside surface and an outside surface. A metallization region overlies at least a portion of the inside surface and at least a portion of the outside surface of the insulating member. The metallization region is formed of a first layer of titanium and a second layer of niobium. A portion of a terminal pin of platinum is disposed through the second aperture. A first brazing seal is disposed between the insulating member and the ferrule and a second brazing seal is disposed between the insulating member and the terminal pin. The first and second brazing seals are formed of gold.

In the invention, the composite bullet-proof armour plate consists of a metal panel, a honeycomb core board, a ceramic wafer core and a metal rear panel bonded with the metal brazing layer via the organic adhesive layer. The preparing method is that using the brozing and the line-cutting method are finished the honeycomb core board and the plain or curved ceramic wafer core, whose size must fit in that of the honeycomb hole of the honeycomb core board. The panel and the rear panel must be made of the bullet-proof steel plate through heat treating after cold rolling. The Ag72Cu metal brazing material and the epoxy resin group high strength structural sizing for connecting the interface are assembly welded.

The invention discloses a vacuum active brazing process for a C/SiC or C/C composite material and metal, which belongs to the technical field of connection of heterostructure materials. The process comprises the following steps of: respectively pretreating a composite material, brazed material and an active brazing material and then placing the active brazing material between the brazed composite material and the metal; vertically applying seal pressure; and then placing a workpiece to be brazed into a vacuum brazing furnace to carry out vacuum brazing. When a difference of the composite material and a metal thermal expansion coefficient is larger, the seal stress is relieved by clamping a metal transition layer between double layers of brazing materials. The invention has the characteristics that by carrying out high-temperature vacuum heat treatment on the composite material, the condition that a volatile matter of the composite material influences the seal quality of the brazing material during vacuum brazing is prevented; the active brazing material and the composite material directly generate physical and chemical reaction, and the gas tightness is good; the seal stress is released by the plastic deformation of transition metal, and the connecting strength is high.

The invention discloses a high-temperature brazing filler metal, relating to a brazing filler metal. The invention solves the problem that joints obtained by using the prior brazing filler composite material have low shearing strength. The brazing filler metal comprises Ti or TiH2, Ni and Nb. When the high-temperature brazing filler material is used to braze C/SiC composite material and the brazing joint of the C/SiC composite material, room temperature three-point bending strength reaches 50MPa-71MPa, and the room temperature shearing strength of the brazing joint of the C/SiC composite material and metal reaches 90MPa-180MPa, moreover, the retention rate of the 800 DEG C high-temperature shearing strength of the brazing joint is more than 69% and the retention rate of the 800 DEG C high-temperature shearing strength is more than 42%. When the high-temperature brazing filler material is used to braze black lead and the joint of Nb, the room temperature shearing strength reaches 30MPa-60MPa.

The present invention relates an iron based brazing material comprising an alloy consisting essentially of: 15 to 30 wt % chromium (Cr); 0 to 5.0 wt % manganese (Mn); 15 to 30 wt % nickel (Ni); 1.0 to 12 wt % molybdenum (Mo); 0 to 4.0 wt % copper (Cu); 0 to 1.0 wt % nitrogen (N); 0 to 20 wt % silicone (Si); 0 to 2.0 wt % boron (B); 0 to 16 wt % phosphorus (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of carbon (C), vanadium (V), titanium (Ti), tungsten (W), aluminium (Al), niobium (Nb), hafnium (Hf), and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si, B and P are in amounts effective to lower melting temperature, and Si, B, and P are contained in amounts according to the following formula: Index=wt % P+1.1×wt % Si+3×wt % B, and the value of the Index is within the range of from about 5 wt % to about 20. The present invention relates also to a method of brazing article of stainless steel, and an article of stainless steel.

This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered technique. Pure niobium when brought into contact with Nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint. A series of diagrams of the interface at various stages of brazing is illustrated by FIG. 10.

For providing an electronic apparatus, having a cooling system therein, for enabling cooling operation of a CPU 200, which is mounted within a housing 100 of the apparatus and needs cooling thereof, the cooling system for cooling the CPU has a cooling jacket 50, a radiator 60, and a circulation pump 70, wherein the cooling jacket comprises a base-plate portion 51, being made of a material superior in heat transfer, such as, copper or the like, and formed with a flow inlet 54 and a flow outlet 55 for the liquid coolant, as well as, a flow passage formed in “U” or “I” shape within an inside thereof, and a cover portion 52, and in a portion of the flow passage of the “U” or “I” shape is disposed a coolant division portion 56 or/and 57, being made up by combining a plural number of pieces of fine tubes in a bundle, each of which is also made of a material superior in the heat transfer, such as copper or the like, through brazing.

The invention relates to a self-flux aluminum solder that is composed of aluminum or aluminum alloy powder, and single or diverse metal halide powder, and mainly applied to the brazing of aluminum or copper, or the alloy. The invention is mainly characterized in that aluminum or aluminum alloy powder and single or diverse metal halide powder are directly pressed into wires or tubes for one time, or the wires can be winded or the tubes can be cut into rings. The self-flux aluminum solder has the advantages that, as active materials are contained, the problems of moisture absorption caused by the flux-cored aluminum welding wire composed of external alloy and core additive, the fallout of the core active materials during the using course and the uneven composition of the core additive and the external alloy can be avoided.

The invention discloses a step-by-step friction stir brazing method for a thick aluminium plate and a rigid dissimilar material. The method can be used for avoiding various problems such as needle abrasion (when a tool with a needle is used), insufficient interface heat, poor mechanical membrane rupture effect and the like existing in the direct friction stir brazing process of the thick aluminium plate and the rigid dissimilar material (such as stainless steel, copper, titanium and steel). The method comprises the following steps of: firstly brazing a thin aluminium plate on the to-be-brazed surface of a rigid dissimilar material through needle-free friction stir brazing, striping by virtue of a metallurgical factor and a mechanical factor, and extruding brazing filler metal, thus realizing a compact joint between the thin aluminium plate and the rigid dissimilar material; and welding the thin aluminium plate brazed on the rigid dissimilar material and a thick aluminium plate through friction stir brazing or friction stir welding, wherein when friction stir brazing is utilized to weld lap joint in the second step, the welding-on area can be obviously enlarged. The process can be used for completely preventing rigid parent metal from abrading a tool; and the interface welding-on of the thin aluminium plate and the dissimilar material is reliable. The method disclosed by the invention can be used for preparing aluminium/stainless steel contact rails and aluminium/copper transition joints.

The invention relates to a novel environment-friendly soldering flux for low-silver SnAgCu unleaded soldering paste, belonging to the field of unleaded solder soldering flux. The invention aims at providing a soldering flux suitable for the low-silver SnAgCu unleaded soldering paste. The soldering flux comprises the following components: 5.0-13.0% of activator, 32.0-41.0% of solvent, 0.8-5.0% of corrosion inhibitors, 1.0-6.0% of thixotropic agent, 2.0 -9.0% of paste forming agent, 0.3-2.5% of stabilizer, 0.5-5.0% of surfactant and 35.0-48.0% of modified rosin. The activator is the compound of a plurality of organic acids, has wide boiling point distribution space, can achieve good activation effect in the whole soldering process, can be mostly volatilized, sublimated or decomposed at the brazing temperature and ensures no corrosion after the soldering. The soldering flux has the advantages of no halogen content, good soldering aiding property, few and hard-film-shaped residuals after the soldering, high insulation resistance, and the like.

A graphene auxiliary brazing method for a ceramic matrix composite material and a metal material elates to a brazing method for the ceramic matrix composite material and the metal material and solves the problem that a brazed connector obtained by brazing the ceramic matrix composite material and the metal material is poor in mechanical property. The brazing method comprises the steps of placing the ceramic matrix composite material into plasma reinforcing chemical vapor deposition equipment to carry out plasma surface treatment, adding CH4 gas to regulate flow, opening a radio frequency power supply, regulating the radio frequency to deposit for 10-30min, using Ar and H2 as protection gas, cooling to the room temperature, obtaining the ceramic matrix composite material with graphene growing on the surface, placing Ti brazing filler metal between faces to be connected, placing the Ti brazing filler metal into a vacuum brazing furnace to be brazed, and finally cooling to the room temperature to finish brazing. The shear strength of a connector formed by the ceramic matrix composite material and the metal material in the brazing method can reach to 35Mpa at the room temperature.

The invention relates to a method for connecting a Cf/SiC composite material and an Ni-based high-temperature alloy, belonging to the field of heterologous material connecting. The technical process comprises the following steps of: (1) carrying out reaction pretreatment on the welding surface of a composite material by utilizing alloying metal liquid; and (2) vacuum brazing connecting. The method is characterized in that the pre-reaction is carried out by applying the welding surface of the titanium-contained metal liquid and the composite material to form a welding surface with raised carbon fibers so as to improve the bonding strength of a subsequent brazing connected interface, and a stable reaction layer containing Ti is formed on the welding surface SiC of the composite material so as to prevent the graphitization reaction of SiC and Ni in the composite material in the subsequent brazing connecting process. A powder containing W and SiC is added to a brazing material, which can prevent the Ni element from diffusing to the composite material in the brazing connecting process, reduce the thermal stress of joints and strengthen the joints. The invention can be conveniently applied to practical work; and the joints have good high-temperature strength and gas tightness. The invention is also suitable for connecting carbon fiber reinforced SiC composite materials and other metals.

The invention discloses scaling powder for no-clean lead-free low-silver welding paste. The scaling powder comprises, by weight percentage, 3-13% of active agent, 0.2-1.5% of surface active agent, 0.2-3.0% of emulgator, 3.0-10.0% of thixotropic agent, 3-8% of film-forming agent, 0.1-1% of antioxidant, 0.1-0.5% of corrosion inhibitor and the rest of solvent. The active agent is composed of four or five components in succinic acid, oxalic acid, salicylic acid, glutaric acid, citric acid, adipic acid, lactic acid, benzoic acid, malic acid and triethanolamine. The scaling powder for the no-clean lead-free low silver welding paste does not contain halogen, the corrosion to a circuit board is greatly lowered, the printing quality of the welding paste is good without bridging or turned-down edges, a welding point is good in forming after returning, the brazing connecting defect is greatly lowered, the residue is small without solder balls, the cleaning is not needed, the welding paste is directly used for assembling, the Sn-0.45 Ag-0.68 Cu or Sn-0.3 Ag-0.7 Cu low silver welding paste manufactured by using the scaling powder does not contain the halogen and rosin, the organic chemistry smoke is small, and the pollution to the environment is small.

An abrasive article includes a plurality of abrasive particles securely affixed to a substrate with a corrosion resistant matrix material. The matrix material includes a sintered corrosion resistant powder and a brazing alloy. The brazing alloy includes an element which reacts with and forms a chemical bond with the abrasive particles, thereby securely holding the abrasive particles in place. A method of forming the abrasive article includes arranging the abrasive particles in the matrix material, and applying sufficient heat and pressure to the mixture of abrasive particles and matrix material to cause the corrosion resistant powder to sinter, the brazing alloy to flow around, react with, and form chemical bonds with the abrasive particles, and allow the brazing alloy to flow through the interstices of the sintered corrosion resistant powder and form an inter-metallic compound therewith.