A kind of SN-based solder for SIC ceramic brazing and preparation method thereof
A brazing and ceramic technology, applied in the field of composite brazing filler metal preparation technology, can solve the problems of complex preparation process, large residual stress of SiC ceramic welded joints, poor wetting performance between brazing filler metal and base metal, etc. The process equipment is simple and easy to operate, and the effect of reducing residual internal stress
Active Publication Date: 2021-08-24
NORTHEAST GASOLINEEUM UNIV
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[0004] An object of the present invention is to provide a kind of Sn-based brazing filler metal for SiC ceramic brazing, this Sn-based brazing filler metal for SiC ceramic brazing is used to solve traditional composite solder preparation process complexity, brazing filler metal and base material The problem of poor wettability, and also solve the problem that the residual stress of SiC ceramic welding joints is large, another object of the present invention is to provide the preparation method of this Sn-based solder for SiC ceramic brazing
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[0018] Below in conjunction with accompanying drawing, the present invention will be further described:
[0019] This Sn-based solder for SiC ceramic brazing is a composite solder prepared from a foamed aluminum alloy skeleton and a filler alloy. The filler alloy is composed of pure aluminum, Sn-9Zn alloy, Zn-5Al alloy, and nano-silver wire. In terms of mass percentage, foamed aluminum alloy skeleton is 5.30%~61.20%, pure aluminum is 0.65%~13.00%, Sn-9Zn alloy is 24.70%~86.00%, Zn-5Al alloy is 0.20%~16.50%, nano silver The line is 0.002%~0.10%.
[0020] The above-mentioned preparation method for the Sn-based solder for SiC ceramic brazing, it may further comprise the steps:
[0021] 1. Filling alloy preparation: Weigh 0.65%~13.00% pure Al, 24.70%~86.00% Sn-9Zn alloy, 0.20%~16.50% Zn-5Al alloy and 0.002%~0.10% nano The silver wire is the raw material for the filler alloy.
[0022] 2. The skeleton of the composite brazing filler metal: cut the foamed aluminum with a wire cutt...
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Abstract
The present invention relates to a Sn-based solder for SiC ceramic brazing and a preparation method thereof, wherein the Sn-based solder for SiC ceramic brazing is a composite solder prepared from a foamed aluminum alloy skeleton and a filler alloy. The alloy is composed of pure aluminum, Sn‑9Zn alloy, Zn‑5Al alloy, and nano-silver wire. In terms of mass percentage, the foam aluminum alloy skeleton is 5.30%~61.20%, pure aluminum is 0.65%~13.00%, and Sn‑9Zn Alloy is 24.70%~86.00%, Zn‑5Al alloy is 0.20%~16.50%, nano silver wire is 0.002%~0.10%. The composite solder of the present invention uses Al foam as the skeleton and Sn alloy as the filler metal, so it can effectively reduce the residual internal stress of the brazing joint and overcome the stress problem caused by the high-temperature soldering of SiC ceramic welding joints. .
Description
Technical field: [0001] The invention relates to the field of composite solder preparation technology, in particular to a Sn-based solder for SiC ceramic brazing and a preparation method thereof. Background technique: [0002] Due to its stable chemical properties, small thermal expansion coefficient, good wear resistance, high mechanical strength, and chemical corrosion resistance, SiC ceramics have been widely used in petroleum, chemical, aviation and aerospace fields. The sintering technology for preparing SiC ceramic materials has also become mature, but the yield of complex and large components of SiC ceramics is still very low, so the industry often adopts the method of welding small-sized SiC ceramics to form large components. It must involve the welding of SiC ceramics and SiC ceramics, and one of the difficulties faced by SiC ceramics welding is the residual stress problem at the interface between SiC ceramics and metal solder. [0003] Due to the large gap between...
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IPC IPC(8): B23K35/26
CPCB23K35/0222B23K35/262
Inventor 马志鹏张茗瑄夏法锋于心泷夏杨嘉雯王晓冬
Owner NORTHEAST GASOLINEEUM UNIV