The invention relates to a brazable three-layered aluminium composite material having at least three layers with at least two different aluminium alloys, whereby an inner layer of the at least three layers is an aluminium brazing layer made from an aluminium brazing alloy, the other layers are configured as covering layers and include at least one further aluminium alloy, wherein the at least one further aluminium alloy has a higher solidus temperature than the liquidus temperature of the aluminium brazing alloy. The individual covering layers have a thickness which exceeds the thickness of the aluminium brazing layer by at least a factor of 1.5, preferably by a factor of 5. The brazable aluminium composite material is simply structured, has good brazing properties for the production of butt-joint brazing connections, significantly reduces the risk of a burning through of brazed-on components and provides sufficient mechanical properties.

A housing for a control unit of a motor vehicle has a housing element and a further element attached to the housing element by way of a joining technique that does not include a joining layer or by way of a joining layer. The housing element has a main body composed of a light metal and a protective layer applied to the main body. The protective layer is arranged between the main body and the attached further element. The invention further relates to a method for producing a housing and to a control unit.

A method for manufacturing a heat exchanger (1) includes joining an inner fin (3) to a hollow structure (20) formed from at least two clad plates (200a, 200b) by heating and brazing a filler metal layer (B). Each clad plate has a core layer (A) composed of an aluminum alloy that contains Mg: 0.40-1.0 mass %. The filler metal layer is composed of an aluminum alloy that contains Si: 4.0-13.0 mass %, and further contains Li: 0.0040-0.10 mass %, Be: 0.0040-0.10 mass %, and/or Bi: 0.01-0.30 mass %. The inner fin is composed of an aluminum alloy that contains Si: 0.30-0.70 mass % and Mg: 0.35-0.80 mass %. A flux (F) that contains cesium (Cs) is applied along a contact part (201), and the vicinity thereof, of the at least two clad plates prior to the heating. A heat exchanger (1) may be manufactured according to this method.

In some examples, the disclosure describes a technique that includes covering a joint surface of a first part including a titanium aluminum (TiAl) alloy with a braze material including aluminum, where covering the joint surface includes at least one of electroplating the braze material on the joint surface, hot dipping the braze material on the joint surface, or positioning a foil of the braze material adjacent to the joint surface, positioning a second part including a titanium alloy in contact with the first part to define a joint region, where the joint region includes the braze material interposed between the second part and the joint surface of the first part, and heating the joint region to at least partially melt the braze material to form a braze joint connecting the first part to the second part.

A method for bonding wafers is provided. The method comprises the steps of providing a first wafer having an exposed first layer, the first layer comprising a first metal; and providing a second wafer having an exposed second layer, the second layer comprising a second metal, the first metal and the second metal capable of forming a eutectic mixture having a eutectic melting temperature. The method further comprises the steps of contacting the first layer with the second layer; and applying a predetermined pressure at a predetermined temperature to form a solid-state diffusion bond between the first layer and the second layer, wherein the predetermined temperature is below the eutectic melting temperature.

A turbine rotor for a supercharger includes a TiAl turbine wheel and a carbon steel shaft joined to each other via an Ni brazing filler metal at a brazed part distanced from a back face of the turbine wheel so that a turbine wheel outer diameter ratio calculated by a distance from the back face of the turbine wheel to the brazed part/an outer diameter of the turbine wheel is within a range of from 7 to 10%.

A bonding body includes: an aluminum member composed of aluminum; and a metal member composed of any one of copper, nickel, and silver, wherein the aluminum member and the metal member are bonded together. In a bonding interface between the aluminum member and the metal member, a Ti layer and an AlTiSi layer are formed, the Ti layer being disposed at the metal member side in the bonding interface, and the AlTiSi layer being disposed between the Ti layer and the aluminum member and containing Si which is solid-solubilized into Al.sub.3Ti. The AlTiSi layer includes: a first AlTiSi layer formed at the Ti layer side; and a second AlTiSi layer formed at the aluminum member side and a Si concentration of which is lower than a Si concentration of the first AlTiSi layer.

A strip intended for the manufacture of brazed heat exchangers, having a core made of an alloy with the composition (weight %): Si: 0.10-0.30%, preferably 0.15-0.25% Fe<0.25%, preferably 0.1-0.2% Cu: 0.85-1.1%, preferably 0.9-1.0% Mn: 1.2-1.7%, preferably 1.2-1.4% Mg: 0.1-0.3%, preferably 0.1-0.21% Zn<0.1% Ti 0.05-0.20%, preferably 0.06-0.15%, more preferably 0.06-0.1% optionally up to 0.15% of Bi and/or Y other elements <0.05% each and <0.15% in total, remainder aluminium.

Provided is a metal jointed body, joined by solid-phase joining in the atmosphere, in which no protrusion of molten joining material occurs, that improves dimensional stability. A metal jointed body is formed by (A) making Ag films of two metal laminated bodies opposed to each other, the metal jointed body being configured by sequentially laminating a Zn film and an Ag film on an Al substrate serving as a member to be joined, and (B) bringing the Ag films into contact with each other, then (C) heating is performed while pressurizing, and closely adhering and solid-phase joining the Ag films to each other. The completed metal jointed body is a portion where AlAg alloy layers are provided on both sides of an AgZnAl alloy layer to join the Al substrates to each other.