A method for joining engine components includes positioning a first plurality of thermal protection structures across a thermal protection space between a first thermal protection surface and a second thermal protection surface. The first and second engine components are locally joined by forming a first plurality of transient liquid phase (TLP) or partial transient liquid phase (PTLP) bonds along corresponding ones of the first plurality of thermal protection structures between the first thermal protection surface and the second thermal protection surface. The second thermal protection surface is formed from a second surface material different from a first surface material of the first thermal protection surface.

A method for joining engine components includes positioning a first plurality of thermal protection structures across a thermal protection space between a first thermal protection surface and a second thermal protection surface. The first and second engine components are locally joined by forming a first plurality of transient liquid phase (TLP) or partial transient liquid phase (PTLP) bonds along corresponding ones of the first plurality of thermal protection structures between the first thermal protection surface and the second thermal protection surface. The second thermal protection surface is formed from a second surface material different from a first surface material of the first thermal protection surface.

An active brazing material for the energy-efficient production of active-brazed connections that consists of layer sequences arranged on top of one another, the layer sequences of which consist of layers arranged on top of on another, the layer sequences of which each comprise at least one layer of brazing material, wherein the layers of brazing material of each layer sequence each contain at least one component of a base active braze and, in conjunction with each other, contain all components of the base active braze, the layer sequences of which each comprise at least one first reaction layer consisting of a first reactant to which at least one second reaction layer is directly adjacent in the active brazing material and consists of a second reactant that exothermally reacts with the first reactant, wherein an enthalpy of formation of the exothermic reaction of the reactants is greater than or equal to 45 kJ/molin particular, greater than or equal to 50 kJ/mol.

An active brazing material for the energy-efficient production of active-brazed connections that consists of layer sequences arranged on top of one another, the layer sequences of which consist of layers arranged on top of on another, the layer sequences of which each comprise at least one layer of brazing material, wherein the layers of brazing material of each layer sequence each contain at least one component of a base active braze and, in conjunction with each other, contain all components of the base active braze, the layer sequences of which each comprise at least one first reaction layer consisting of a first reactant to which at least one second reaction layer is directly adjacent in the active brazing material and consists of a second reactant that exothermally reacts with the first reactant, wherein an enthalpy of formation of the exothermic reaction of the reactants is greater than or equal to 45 kJ/molin particular, greater than or equal to 50 kJ/mol.

A method of controlling a weld penetration profile on a workpiece (306) having an outer region and an inner region is described. The method comprises the step of applying energy to the outer region of the workpiece with a welder (302) to produce a weld pool (304). The method also comprises the steps of penetrating the workpiece (306) such that the weld pool (304) spans between the outer region and inner region, and also applying a shielding gas to the inner region at a pressure that provides a force that limits weld penetration. A corresponding apparatus is also defined.

A method of controlling a weld penetration profile on a workpiece (306) having an outer region and an inner region is described. The method comprises the step of applying energy to the outer region of the workpiece with a welder (302) to produce a weld pool (304). The method also comprises the steps of penetrating the workpiece (306) such that the weld pool (304) spans between the outer region and inner region, and also applying a shielding gas to the inner region at a pressure that provides a force that limits weld penetration. A corresponding apparatus is also defined.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

A method of interconnecting a conductor and a hermetic feedthrough of an implantable medical device includes welding a lead to a pad on a feedthrough. The feedthrough includes a ceramic insulator and a via hermetically bonded to the insulator. The via includes platinum. The pad is bonded to the insulator and electrically connected to the via, includes platinum, and has a thickness of at least 50 m. The lead includes at least one of niobium, platinum, titanium, tantalum, palladium, gold, nickel, tungsten, and oxides and alloys thereof.

A hermetically sealed filtered feedthrough assembly attachable to an AIMD includes an insulator hermetically sealing the opening of a ferrule with a gold braze. The ferrule includes a peninsula extending into the ferrule opening and the insulator has a cutout matching the peninsula. A sintered platinum-containing paste hermetically seals at least one via hole extending through the insulator. At least one capacitor is disposed on the device side. An active electrical connection electrically connects the capacitor active metallization to the sintered paste. A ground electrical connection electrically connects the capacitor ground metallization disposed within a capacitor ground passageway to the portion of the gold braze along the ferrule peninsula. The dielectric of the capacitor may be less than 1,000 k.

An orthopedic implant in the form of a hip joint endoprosthesis includes a ceramic head set onto an anchoring shaft, which is configured and adapted to be inserted and anchored into a bone. The head has an inner blind recess. The anchoring shaft has a tenon. A metallic sleeve having an approximately central through-bore is soldered into the recess of the head. The tenon of the anchoring shaft is inserted and secured in the bore of the sleeve. The head is made of a ceramic based on zirconium dioxide, aluminum oxide or a mixed ceramic, while the sleeve is made of a high strength titanium material. A connection between the head and the sleeve is produced by a silicate ceramic solder that solidifies or hardens in a ceramic firing, and by a subsequently applied glass solder, of which the excess can exit from the recess via the through-bore into a hollow space existing between the sleeve and the tenon.