Described herein is an aluminium alloy multi-layered brazing sheet product for brazing in an inert-gas atmosphere without a flux, comprising a core layer made of a 3xxx alloy comprising 0.20-0.75 wt. % Mg, and provided with a covering clad layer comprising 2-5 wt. % Si on one or both sides of said 3xxx alloy core layer and a Al—Si brazing clad layer comprising 7-13 wt. % Si positioned between the 3xxx alloy core layer and the covering clad layer, wherein the covering clad layer has a thickness X.sub.1 and the Al—Si brazing clad layer has a thickness X.sub.2 and wherein X.sub.2≥2X.sub.1. The invention further relates to the use of an aluminium alloy multi-layered brazing sheet product in a fluxfree controlled atmosphere brazing (CAB) operation to produce a heat exchanger apparatus.

Described herein is an aluminium alloy multi-layered brazing sheet product for brazing in an inert-gas atmosphere without a flux, comprising a core layer made of a 3xxx alloy comprising 0.20-0.75 wt. % Mg, and provided with a covering clad layer comprising 2-5 wt. % Si on one or both sides of said 3xxx alloy core layer and a Al—Si brazing clad layer comprising 7-13 wt. % Si positioned between the 3xxx alloy core layer and the covering clad layer, wherein the covering clad layer has a thickness X.sub.1 and the Al—Si brazing clad layer has a thickness X.sub.2 and wherein X.sub.2≥2X.sub.1. The invention further relates to the use of an aluminium alloy multi-layered brazing sheet product in a fluxfree controlled atmosphere brazing (CAB) operation to produce a heat exchanger apparatus.

Low melting temperature flux materials for brazing applications and methods of brazing using the same are provided. A low melting temperature flux material for brazing applications includes as a majority constituent, a Cs-containing flux material, as a first minority constituent, a eutectic blend composition, and, optionally, as a second minority constituent, a mediating compound. The second minority constituent is present in the low melting temperature flux material in a lesser amount with respect to the first minority constituent.

An aluminum alloy brazing sheet having a core material, a brazing filler material provided on one surface of the core material, and an intermediate material provided between the core material and the brazing filler material. The core material contains, in mass%, Mn: 0.20% to 2.00%, Si: 0.20% to 1.50%, Cu: 0.20% to 1.50%, and Mg: 0.10% to 0.90%, with the remainder being Al and unavoidable impurities. The intermediate material contains, in mass%, Zn: 0.50% to 8.00%, and Mg: 0.10% to 0.90%, with the remainder being Al and unavoidable impurities. The brazing filler material contains, in mass%, Si: 5.00% to 15.00%, Mg: 0.10% to 0.90%, Bi: 0.10% to 0.50%, and Cu: 0.05% to 0.50%, with the remainder being Al and unavoidable impurities. The aluminum alloy brazing sheet satisfies the formula 10.0≤[Zn]/[Cu]≤40.0.

An arc brazing method of bonding different materials includes disposing an aluminum alloy to be bonded on a steel base material and arc brazing a welded portion between the steel base material and the aluminum alloy using a wire. The wire is an alloy containing Zn. It is possible to compensate for brittleness due to the bonding of different materials and to improve wettability.

A method for manufacturing an electrostatic chuck with multiple chucking electrodes made of ceramic pieces using metallic aluminum as the joining. The aluminum may be placed between two pieces and the assembly may be heated in the range of 770 C to 1200 C. The joining atmosphere may be non-oxygenated. After joining the exclusions in the electrode pattern may be machined by also machining through one of the plate layers. The machined exclusion slots may then be filled with epoxy or other material. An electrostatic chuck or other structure manufactured according to such methods.

The invention relates to a multi-layered brazing sheet material comprising of an aluminum core alloy layer provided with a first brazing clad layer material on one or both sides of the aluminum core layer and at least one second brazing clad layer material positioned between the aluminum core alloy layer and the first brazing clad layer material.

Aluminum-magnesium alloys useful as welding wire and mechanical support are disclosed. The aluminum-magnesium alloys exhibit improved cold wire drawing performance. Grain refiners and methods of forming the aluminum-magnesium alloys are further disclosed.

An aluminum alloy brazing sheet may include a sacrificial material having a function of a brazing material on at least one surface of a core material, wherein the sacrificial material has a composition containing: in a mass %, 2% to 5% of Si; 3% to 5% of Zn; and an Al balance with inevitable impurities the core material is made of an Al—Mn-based alloy, an in the core material before brazing, Al—Mn based secondary particles having an equivalent circle diameter of 100 to 400 nm are distributed with a number density of 0.3 to 5 particles/μm.sup.2.

An aluminum alloy brazing sheet may include a sacrificial material having a function of a brazing material on at least one surface of a core material, wherein the sacrificial material has a composition containing: in a mass %, 2% to 5% of Si; 3% to 5% of Zn; and an Al balance with inevitable impurities the core material is made of an Al—Mn-based alloy, an in the core material before brazing, Al—Mn based secondary particles having an equivalent circle diameter of 100 to 400 nm are distributed with a number density of 0.3 to 5 particles/μm.sup.2.