Sn-based brazing filler metal used for SiC ceramic braze welding and preparation method thereof

A technology of brazing and ceramics, which is applied in the field of composite solder preparation technology, can solve the problems of large residual stress of SiC ceramic welding joints, poor wetting performance between solder and base metal, and complicated preparation process, and achieve simple and easy operation of process equipment , good wettability and high mechanical properties

Active Publication Date: 2020-05-15
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[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

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  • Sn-based brazing filler metal used for SiC ceramic braze welding and preparation method thereof
  • Sn-based brazing filler metal used for SiC ceramic braze welding and preparation method thereof
  • Sn-based brazing filler metal used for SiC ceramic braze welding and preparation method thereof

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[0018] The present invention will be further explained below in conjunction with the drawings:

[0019] This Sn-based solder for SiC ceramic brazing is a composite solder made of foamed aluminum alloy skeleton and 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, the 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 of Sn-based solder for SiC ceramic brazing:

[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 Silver wire is a raw material for filling alloy.

[0022] 2. The skeleton of the composite brazing filler metal: the wire cutting machine cuts the foamed aluminum to obtain a foamed aluminum sheet with a thickness of 1mm, see ...

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Abstract

The invention relates to Sn-based brazing filler metal used for SiC ceramic braze welding and a preparation method thereof. The Sn-based brazing filler metal used for SiC ceramic brake welding consists of the following components in percentage by mass: 5.30%-61.20% of a foam aluminum alloy framework, 0.65%-13.00% of pure aluminum, 24.70%-86.00% of Sn-9Zn alloy, 0.20%-16.50% of Zn-5Al alloy, and 0.002%-0.10% of a silver nanowire. The composite brazing filler metal takes the foam Al as a framework, and takes an Sn alloy as filling metal, so that so that residual internal stress of a braze-welding joint can be effectively reduced, and the stress problem due to the fact that the SiC ceramic welding joint uses high-temperature brazing filler metal to perform high-temperature welding is overcome.

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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Application Information

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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
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