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Surface coating technology of silicon carbide particle reinforced aluminium-based composite

A technology of silicon carbide particles and reinforced aluminum base, which is applied in metal material coating process, liquid chemical plating, superimposed layer plating, etc., can solve problems such as excessive corrosion, uneven coating, and affecting the surface roughness of parts. To achieve the effect of avoiding excessive corrosion

Inactive Publication Date: 2014-01-08
CHENGDU SIWI HIGH TECH IND GARDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]a. It is difficult to roughen the surface of silicon carbide and aluminum. The existing roughening processes mainly include hydrofluoric acid roughening and hydrogen peroxide roughening, etc., but hydrofluoric acid Coarsening is likely to cause excessive corrosion of the silicon carbide phase on the surface of the part, affecting the surface roughness of the part; hydrogen peroxide roughening is likely to cause excessive corrosion of the aluminum phase on the surface of the part, and even cause the surface to pulverize the solution, and the solution is unstable and easy to decompose
[0005]b. It is difficult to activate the surface of silicon carbide and aluminum. The existing activation processes mainly include colloidal palladium activation and nickel salt activation, but colloidal palladium is activated on the surface of silicon carbide and aluminum. Difficult; the typical solution for nickel salt activation is a suspension, which can easily cause uneven surface activation, thereby forming an uneven coating, and the activation yield is not high
[0006] The problem of surface roughening and activation of SiCAl will eventually lead to poor bonding of SiCAl composites to the coating, resulting in surface bubbling, cracking and Plating peeling off

Method used

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  • Surface coating technology of silicon carbide particle reinforced aluminium-based composite
  • Surface coating technology of silicon carbide particle reinforced aluminium-based composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Make a coating on the surface of silicon carbide particle-reinforced aluminum matrix composite material, take silicon carbide aluminum parts, and follow the steps below:

[0038] 1) Solvent degreasing, place the parts in acetone, soak for 7 minutes under the assistance of ultrasonic waves, and wash off most of the oil on the surface of the parts.

[0039] 2) For chemical degreasing, prepare Atotech U-151 degreasing powder (purchased from Atotech) into an aqueous solution at a mass volume ratio of 20g / L, and soak the parts in the solution at a temperature of 40°C for 15 min.

[0040] 3) Coarsening: Prepare the roughing solution according to the following ratio: nitric acid with a volume ratio of 600ml / L, ammonium bifluoride with a mass-volume ratio of 150g / L, and water as the balance, mix well, immerse the parts in the above solution, lightly Shake lightly, roughen at temperature: 15°C for 6 minutes, put the parts into running tap water and clean them immediately after ...

Embodiment 2

[0050] Make a coating on the surface of silicon carbide particle-reinforced aluminum matrix composite material, take silicon carbide aluminum parts, and follow the steps below:

[0051] 1) Solvent degreasing, place the parts in acetone, soak for 10 minutes under the assistance of ultrasonic waves, and wash off most of the oil on the surface of the parts.

[0052] 2) For chemical degreasing, prepare Atotech U-151 degreasing powder (purchased from Atotech) into an aqueous solution at a mass volume ratio of 40g / L, and soak the parts in the solution at a temperature of 60°C for 10 min.

[0053] 3) Coarsening: Prepare the roughing solution according to the following ratio: nitric acid with a volume ratio of 700ml / L, ammonium bifluoride with a mass-volume ratio of 100g / L, and water as the balance, mix well, immerse the parts in the above solution, lightly Shake lightly, roughen at temperature: 30°C for 2 minutes, and quickly put the parts into running tap water to clean after rough...

Embodiment 3

[0063] Make a coating on the surface of silicon carbide particle-reinforced aluminum matrix composite material, take silicon carbide aluminum parts, and follow the steps below:

[0064] 1) Solvent degreasing, place the parts in acetone, soak for 8 minutes under the assistance of ultrasonic waves, and wash off most of the oil on the surface of the parts.

[0065] 2) For chemical degreasing, prepare Atotech U-151 degreasing powder (purchased from Atotech) into an aqueous solution at a mass volume ratio of 30g / L, and soak the parts in the solution at a temperature of 50°C for 12 min.

[0066] 3) Roughening: Prepare the roughening solution according to the following ratio: nitric acid with a volume ratio of 650ml / L, ammonium bifluoride with a mass-volume ratio of 120g / L, and water as the balance, mix well, immerse the parts in the above solution, lightly Shake lightly, roughen at temperature: 20°C for 4 minutes, put the parts into flowing tap water and clean them immediately afte...

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Abstract

The invention discloses a surface coating technology of a silicon carbide particle reinforced aluminium-based composite. The surface coating technology comprises the following steps: removing oil by using a solvent, chemically degreasing, coarsening, activating, chemically nickeling, removing a film, activating the surface of a nickel plating layer, carrying out follow-up electroplating and the like. The surface coating technology can be used for successfully solving the problem through the optimal combination of technological parameters in the steps that as a silicon carbide aluminum base and a coating of a conventional coating material are poor combined with each other, the phenomena such as surface bubbling, cracking and coating falling easily occur in the using process.

Description

technical field [0001] The invention belongs to the field of surface treatment, and in particular relates to a surface coating process. Background technique [0002] Silicon carbide particle reinforced aluminum matrix composite material (hereinafter referred to as silicon carbide aluminum matrix composite material) is a particle-reinforced composite material with good thermal and electrical conductivity. By adjusting the proportion of reinforced particles, the thermal expansion coefficient can be matched with ceramics. Therefore, in There are more and more applications in the microelectronics metal packaging industry. In practical applications, in order to improve the eutectic and brazing properties of the surface of silicon carbide aluminum parts, it needs to be electroplated. [0003] The existing electroplating process of silicon carbide aluminum mainly has the following problems: [0004] a. It is difficult to roughen the surface of silicon carbide and aluminum. The ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02C23C18/32C23C18/24C23C18/30
Inventor 李元朴李忠宝
Owner CHENGDU SIWI HIGH TECH IND GARDEN
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