A field device for processing and automation technology includes a first and a second component that can each be mechanically connected at a joining surface by means of a joining point. Two metal surface layers are each applied at least to the joining surface of the first component and the joining surface of the second component. The metal of the surface layers is different from the metal of the first and/or the metal of the second component. A joining material is applied between the respective joining surfaces of the two components, wherein the joining material includes particles at least partially consisting of a metal that corresponds with the metal of the surface layers The joining of the two components occurs at a joining temperature below 300° C.

A method of pretinning a guidewire core made of shape memory alloy and having an elongate axis, comprising: placing a ball of solder in a pocket in a soldering block; melting the ball of solder; holding a guidewire core over the ball of solder; lowering the guidewire core into the ball of solder; removing the guidewire from the ball of solder.

Undercooled liquid metallic core-shell particles, whose core is stable against solidification at ambient conditions, i.e. under near ambient temperature and pressure conditions, are used to join or repair metallic non-particulate components. The undercooled-shell particles in the form of nano-size or micro-size particles comprise an undercooled stable liquid metallic core encapsulated inside an outer shell, which can comprise an oxide or other stabilizer shell typically formed in-situ on the undercooled liquid metallic core. The shell is ruptured to release the liquid phase core material to join or repair a component(s).

The present invention relates to an article comprising a ceramic substrate (310) comprising a source of zirconium oxide; a metallic substrate (320); and a braze joint disposed between the ceramic substrate and the metallic substrate. The braze joint comprises (i) a gold rich phase (330) interfacing against a surface of the ceramic substrate. The gold rich phase comprises a refractory metal selected from the group consisting of molybdenum, tungsten, niobium, tantalum and combinations thereof; and (ii) a second metallic phase (340) comprising a metal selected form the group consisting of nickel, iron, vanadium, cobalt, chromium, osmium, tantalum or combinations thereof.

A method of pretinning a core wire for a guidewire having an elongate axis, comprising placing a ball of solder within a pocket in a soldering block; melting the ball of solder; holding a core wire over the ball of solder, with the elongate axis in a horizontal orientation; lowering a portion of the core wire into the ball of solder while maintaining the elongate axis in a horizontal orientation; removing the core wire from the ball of solder.

The preparation and use of particulate metallic solder alloy having particles of a single chemical composition is described. The particles of the particulate metallic solder alloy have a bimodal size distribution in which particles in a smaller size range have a largest dimension that is smaller than a smallest dimension of particles in a larger size range of the bimodal distribution. In some examples the particles in the smaller size mode have dimensions in the range of 1 to 100 nm. In some examples, the particles in the larger size mode have dimensions in the range of 2 to 75 microns in dimension. In some examples, a halogen-free flux is used. In some examples, a solvent is used to make a paste.

Undercooled liquid metallic core-shell particles, whose core is stable against solidification at ambient conditions, i.e. under near ambient temperature and pressure conditions, are used to join or repair metallic non-particulate components. The undercooled-shell particles in the form of nano-size or micro-size particles comprise an undercooled stable liquid metallic core encapsulated inside an outer shell, which can comprise an oxide or other stabilizer shell typically formed in-situ on the undercooled liquid metallic core. The shell is ruptured to release the liquid phase core material to join or repair a component(s).

A method for assembling a zirconia part to a titanium element with braze, the method comprising the following steps: coating a surface of the titanium element with a niobium layer, positioning a braze between the zirconia part and the niobium, the braze being of gold or a gold alloy, heating the whole to a temperature higher than the melting temperature of the braze, and then cooling the whole, whereby an assembly comprising the zirconia part and the titanium element assembled by a brazing joint comprising a first portion of gold or a gold alloy, a second portion formed by a reaction layer comprising intermetallics of the AuNbTi system, and a third portion formed by an oxide reaction layer is obtained.

A manufacturing method of a light-emitting device includes: preparing a mounting substrate having a mounting surface, the mounting substrate including a first metal pattern arranged on a mounting surface side, a second metal pattern arranged on the mounting surface side inward of the first metal pattern in a plan view, and a third metal pattern arranged on the mounting surface side outward of the first metal pattern in the plan view; arranging a light-emitting element over the mounting surface of the mounting substrate; applying a bonding material to the first metal pattern; and joining a sealing member to at least the first metal pattern of the mounting substrate via the bonding material, the sealing member including a fourth metal pattern with a width greater than or equal to a width of the first metal pattern.

A method for brazing a metal part onto a surface of a zirconia component. The method involves the steps of altering the surface state of the component to permit the attachment of a first metallization layer, cleaning the component to eliminate the impurities from its surface, depositing a first metallization layer, having mainly titanium, on the surface of the component, depositing a second metallization layer, having mainly niobium, on the first metallization layer, applying the part against the second metallization layer, depositing a gold brazing metal on the part and the second metallization layer, cooling the brazed area in a temperature-controlled manner, and stress-relieving heat treatment being performed under load on the metal part before brazing.