A kind of variable-scale boron nitrogen graphene modified layer solder, preparation method and application
A graphene modification and scale-changing technology, applied in manufacturing tools, welding equipment, metal processing equipment, etc., can solve problems such as low connection strength, low connection strength, nitrogen loss, etc., and achieve enhanced phase segregation phenomenon , Improve the fluidity of solder and enhance the effect of filling ability
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Embodiment 1
[0039] A variable-scale boron-nitrogen graphene modified layer brazing filler metal, comprising a boron-nitrogen graphene reinforced alloy layer with a thickness of 25nm on the upper surface, the boron-nitrogen graphene reinforced alloy layer is composed of boron-nitrogen graphene and nickel-based alloy Composition, the nickel-based alloy is a binary nickel-based alloy composed of nickel and gold, which can reduce the melting temperature of the brazing filler metal, improve the fluidity of the brazing filler metal, and enhance the seam filling ability of the brazing filler metal;
[0040]A silver brazing sheet located in the middle layer with a thickness of 250 μm, the silver brazing sheet is a silver-copper-nickel foil strip brazing filler metal with an Ag content of less than 18.5%, which has a solid solution strengthening effect and can strengthen the boron-nitrogen graphene alloy layer , The boron nitrogen graphene-coated foam metal layer is organically fused into the gap o...
Embodiment 2
[0061] A kind of variable-scale boron-nitrogen graphene modified layer solder, comprising a boron-nitrogen graphene reinforced alloy layer with a thickness of 15nm located on the upper surface, and the boron-nitrogen graphene reinforced alloy layer is composed of boron-nitrogen graphene and nickel-based alloy Composition, the nickel-based alloy is a ternary nickel-based alloy composed of nickel, gold and copper, which can reduce the melting temperature of the brazing filler metal, improve the fluidity of the brazing filler metal, and enhance the seam filling ability of the brazing filler metal;
[0062] A gold brazing filler metal sheet with a thickness of 80 μm located in the middle layer. The gold brazing filler metal sheet is a gold-nickel-copper-boron foil strip solder with an Au content of less than 40%, which has a solid solution strengthening effect and can strengthen the boron-nitrogen-graphene alloy Layer, boron-nitrogen graphene-coated metal foam layer is organically ...
Embodiment 3
[0083] A kind of variable-scale boron-nitrogen graphene modified layer solder, comprising a boron-nitrogen graphene reinforced alloy layer with a thickness of 10nm on the upper surface, the boron-nitrogen graphene reinforced alloy layer is composed of boron-nitrogen graphene and nickel-based alloy Composition, the nickel-based alloy is a ternary nickel-based alloy composed of nickel, gold and copper, which can reduce the melting temperature of the brazing filler metal, improve the fluidity of the brazing filler metal, and enhance the seam filling ability of the brazing filler metal;
[0084] A gold brazing filler metal sheet with a thickness of 100 μm located in the middle layer. The gold brazing filler metal sheet is a gold-nickel-copper-boron foil strip solder with an Au content of less than 40%, which has a solid solution strengthening effect and can strengthen the boron-nitrogen-graphene alloy Layer, boron-nitrogen graphene-coated metal foam layer is organically fused into ...
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