Active brazing material and method for active brazing of components
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Abstract
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/mol—in particular, greater than or equal to 50 kJ/mol.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. An active brazing material, comprising:
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layer sequences arranged on top of one another, said layer sequences consist of layers arranged on top of one another;
wherein;said layer sequences each comprise at least one layer of brazing material, 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; and said layer sequences 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 said first reactant, an enthalpy of formation of the exothermic reaction of the reactants is greater than or equal to 45 kJ/mol—
in particular, greater than or equal to 50 kJ/mol. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for producing an active brazing material, comprising:
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an active brazing material, comprising; layer sequences arranged on top of one another, said layer sequences consist of layers arranged on top of one another;
wherein;
said layer sequences each comprise at least one layer of brazing material, 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; and
said 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 said first reactant, an enthalpy of formation of the exothermic reaction of the reactants is greater than or equal to 45 kJ/mol—
in particular, greater than or equal to 50 kJ/mol, the method comprising;in which the individual layers are applied to one another by consecutive vapor deposition—
in particular, consecutive sputtering operations. - View Dependent Claims (27, 28, 29)
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30. A ceramic pressure sensor, having:
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a ceramic measurement membrane, wherein the ceramic measurement membrane is made of aluminum oxide, that can be supplied with pressure and elastically deformed as a function of the pressure;
wherein;the base body comprises a ceramic base body made of aluminum oxide (Al2O3); and an active-brazed connection that bonds an outer edge of a first side of the measurement membrane including a pressure chamber to an outer edge of a face side of said base body facing the measurement membrane and is produced using an active brazing material comprising; layer sequences arranged on top of one another, said layer sequences consist of layers arranged on top of one another;
wherein;
said layer sequences each comprise at least one layer of brazing material 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;
said layer sequences 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 said first reactant, an enthalpy of formation of the exothermic reaction of the reactants is greater than or equal to 45 kJ/mol—
in particular, greater than or equal to 50 kJ/mol; andthe base active braze of said active brazing material has the components zirconium, nickel, and titanium.
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Specification