Graphene-enhanced Al-based composite solder auxiliary soldering method

Abstract

The invention relates to a solder auxiliary soldering method, in particular to a graphene-enhanced Al-based composite solder auxiliary soldering method. The method solves the problems that existing graphene is poor in aluminum base enhancing effect and poor in dispersibility. The method comprises the steps that an oxidized graphene suspension and an aluminum solder suspension are mixed, dried and then placed into a plasma enhanced chemical vapor deposition vacuum device for reduction treatment, then, the mixture is pressed into foils, the graphene / aluminum-based solder foils are placed between to-be-soldered faces of metal to be soldered for vacuum soldering, and the graphene-enhanced Al-based composite solder auxiliary soldering method is completed. The method is used for graphene-enhanced Al-based composite solder auxiliary soldering.

Description

technical field

[0001] The present invention relates to a method of solder assisted brazing. Background technique

[0002] Due to the huge difference in the physical and chemical properties of the matrix and the reinforcement phase of the aluminum matrix composite material, its connection characteristics are obviously different from those of the matrix metal material. The melting point of the aluminum matrix is ​​low. At the brazing temperature, part of the matrix melts and the reinforcement does not decompose or melt, which increases the viscosity of the composite material and affects the flow and spreading of the solder, resulting in matrix and matrix, matrix and reinforcement phase, and reinforcement phase. Connections between reinforcement phases are difficult to achieve. At the same time, it increases the sensitivity of the welding process to defects such as pores, lack of fusion, and incomplete penetration, which hinders the realization of the brazing process and seri...

Examples

specific Embodiment approach 1

[0018] Specific embodiment one: a kind of graphene-reinforced method for Al-based composite solder assisted brazing described in this embodiment is specifically carried out according to the following steps:

[0019] 1. Add graphene oxide into deionized water and ultrasonically treat it for 2h to 3h to prepare graphene oxide suspension;

[0020] 2. Under the condition that the rotating speed is 300rpm-350rpm, grind the aluminum-based solder in a stainless steel stirring tank for 4h-5h, add the ground aluminum-based solder to absolute ethanol to obtain a suspension of aluminum-based solder, and The aluminum-based solder suspension and the graphene oxide suspension are mixed, and the temperature is 0°C, and the cold mass is ultrasonicated for 2h to 3h to obtain the mixed powder. Dry for 2h to 3h to obtain dried powder;

[0021] The mass percent of graphene oxide in the dried powder is 0.5% to 6%;

[0022] 3. Put the dried powder in the plasma-enhanced chemical vapor deposition ...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the aluminum-based solder described in step 2 is aluminum-silicon solder, aluminum-silicon-copper solder, aluminum-silicon-magnesium solder or aluminum-silicon-zinc solder . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the metal to be welded in step four is 6063 aluminum alloy or SiC p / 101Al. Others are the same as in the first or second embodiment.

technical field

[0001] The present invention relates to a method of solder assisted brazing. Background technique

[0002] Due to the huge difference in the physical and chemical properties of the matrix and the reinforcement phase of the aluminum matrix composite material, its connection characteristics are obviously different from those of the matrix metal material. The melting point of the aluminum matrix is ​​low. At the brazing temperature, part of the matrix melts and the reinforcement does not decompose or melt, which increases the viscosity of the composite material and affects the flow and spreading of the solder, resulting in matrix and matrix, matrix and reinforcement phase, and reinforcement phase. Connections between reinforcement phases are difficult to achieve. At the same time, it increases the sensitivity of the welding process to defects such as pores, lack of fusion, and incomplete penetration, which hinders the realization of the brazing process and seri...

Examples

specific Embodiment approach 1

[0018] Specific embodiment one: a kind of graphene-reinforced method for Al-based composite solder assisted brazing described in this embodiment is specifically carried out according to the following steps:

[0019] 1. Add graphene oxide into deionized water and ultrasonically treat it for 2h to 3h to prepare graphene oxide suspension;

[0020] 2. Under the condition that the rotating speed is 300rpm-350rpm, grind the aluminum-based solder in a stainless steel stirring tank for 4h-5h, add the ground aluminum-based solder to absolute ethanol to obtain a suspension of aluminum-based solder, and The aluminum-based solder suspension and the graphene oxide suspension are mixed, and the temperature is 0°C, and the cold mass is ultrasonicated for 2h to 3h to obtain the mixed powder. Dry for 2h to 3h to obtain dried powder;

[0021] The mass percent of graphene oxide in the dried powder is 0.5% to 6%;

[0022] 3. Put the dried powder in the plasma-enhanced chemical vapor deposition ...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the aluminum-based solder described in step 2 is aluminum-silicon solder, aluminum-silicon-copper solder, aluminum-silicon-magnesium solder or aluminum-silicon-zinc solder . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the metal to be welded in step four is 6063 aluminum alloy or SiC p / 101Al. Others are the same as in the first or second embodiment.