A method for brazing dissimilar materials assisted by a carbon nanotube sponge intermediate layer

A carbon nanotube sponge, dissimilar material technology, applied in auxiliary devices, welding equipment, manufacturing tools, etc., can solve problems such as low strength, and achieve the effect of enhancing brazing seam performance, excellent mechanical properties, and improving joint strength

Active Publication Date: 2022-06-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low strength of brazing joints between existing metal materials and dissimilar materials, the present invention proposes a method for assisting brazing of dissimilar materials with a carbon nanotube sponge intermediate layer

Method used

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  • A method for brazing dissimilar materials assisted by a carbon nanotube sponge intermediate layer
  • A method for brazing dissimilar materials assisted by a carbon nanotube sponge intermediate layer
  • A method for brazing dissimilar materials assisted by a carbon nanotube sponge intermediate layer

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specific Embodiment approach 1

[0027] Embodiment 1: The method for assisted brazing of dissimilar materials in the carbon nanotube sponge intermediate layer of the present embodiment is carried out according to the following steps:

[0028] Step 1: Mix the carbon nanotube powder with a strong acid solution, and then perform ultrasonic cleaning at a constant temperature of 60°C to obtain a suspension;

[0029] Step 2, dispersing the suspension obtained in step 1 into deionized water to obtain a mixed solution, then vacuum filtration of the mixed solution to obtain a filter cake, then continue to wash the filter cake, and finally peel off the filter cake and the filter membrane;

[0030] Step 3, ultrasonically dispersing the filter cake obtained by stripping in step 2 into absolute ethanol, centrifuging, and retaining the supernatant;

[0031] Step 4, carry out vacuum filtration on the supernatant obtained in step 3, peel off to obtain a filter cake, and finally dry to obtain carbon nanotube sponge;

[0032]...

specific Embodiment approach 2

[0042] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the carbon nanotube powder in step 1 is single-wall carbon nanotube, double-wall carbon nanotube or multi-wall carbon nanotube.

specific Embodiment approach 3

[0043]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the ratio of the mass of the carbon nanotube powder described in step 1 to the volume of the strong acid solution is (10-200) mg: (10-30) mL .

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Abstract

The invention relates to a method for brazing dissimilar materials assisted by a carbon nanotube sponge intermediate layer, and relates to a method for brazing dissimilar materials. In order to solve the problem of low strength of brazed joints between existing metal materials and dissimilar materials. Method: Mix carbon nanotubes with a strong acid solution and ultrasonically clean them, then disperse them in deionized water for suction filtration, and ultrasonically disperse the filter cake in absolute ethanol for centrifugation to obtain a supernatant; then suction filter, dry, and finally braze the dissimilar materials. Or mix the carbon nanotubes with a strong acid solution for ultrasonic cleaning, then disperse the liquid into deionized water and filter it with suction, and disperse the filter cake ultrasonically in absolute ethanol to obtain a supernatant; Dry and finally braze to dissimilar materials. The preparation method of the carbon nanotube sponge of the present invention is simple and low in cost, can avoid the agglomeration of the carbon nanotubes in the brazing process, is beneficial to control the interface structure, enhances the performance of the brazing seam, relieves the residual stress of the joint, and improves the strength of the joint. The invention is suitable for brazing dissimilar materials.

Description

technical field [0001] The invention relates to a method for brazing dissimilar materials. Background technique [0002] Reliable connection of dissimilar materials has always been a popular research direction. Components prepared from multiple materials can complement the advantages of materials, give full play to their respective advantages and properties, and better meet the production needs of modern industries, especially metal materials and other materials. Welding of dissimilar materials, other dissimilar materials such as ceramics, composite materials, etc., welding of metal materials and other dissimilar materials can selectively achieve high temperature resistance, wear resistance, corrosion resistance, wave transmission and filtering, thermal conductivity and electrical conductivity of components. performance, etc. However, due to the difference in the physical and chemical properties of the base metal to be welded, there will be problems such as poor solder wett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20B23K3/08
CPCB23K1/008B23K1/206B23K3/085
Inventor 常青张丽霞韩逸姝孙湛刘奥博冯吉才
Owner HARBIN INST OF TECH
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