Preparation method of wear-resistant toughened composite ceramic layer on surface of aluminum alloy product

A technology of aluminum alloy surface and composite ceramics, applied in the direction of coating, anodizing, electrolytic coating, etc., can solve the problems of surface micropore leakage and cold sealing, and achieve the effect of improving corrosion resistance, high hardness and improving toughness

Inactive Publication Date: 2012-07-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the reports on cold sealing holes are mainly focused on solving the problem of micropore leakage on the surface of aluminum products after ordinary anodic oxidation (Cai Xichang. Factors affecting the quality of cold sealing holes and improvement measures [J]. Surface Treatment, 1998, 27 (6)), However, there is no report on the application of this technology to the sealing treatment of aluminum alloy micro-arc oxidation film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Sample preparation: Al6063 aluminum alloy is selected and processed into aluminum alloy products that meet the requirements;

[0025] (2) Pretreatment: use 200 in turn # , 400 # , 600 # , 1000 # , 1200 # Grinding with sandpaper, ultrasonically cleaning aluminum alloy products with acetone, distilled water, and absolute ethanol 10 min , dry for later use;

[0026] (3) Preparation of micro-arc oxidation electrolyte: nano-zirconia particles 1.6g / L, nano-silicon carbide particles 1.6g / L, silicate 8g / L, potassium hydroxide 1g / L, borate 3g / L;

[0027](4) Preparation of cold sealing solution: mainly nickel salt containing crystal water and alkali metal fluoride, in which the content of nickel acetate is 8.6g / L, and the content of sodium fluoride is 1.4g / L. The content of agent isopropanol is 0.05g / L, and the content of a kind of surfactant stearic acid is 0.05g / L, stir well, for subsequent use;

[0028] (5) Micro-arc oxidation: use the aluminum alloy product obtaine...

Embodiment 2

[0031] (1) Sample preparation: Al6063 aluminum alloy is selected and processed into aluminum alloy products that meet the requirements;

[0032] (2) Pretreatment: use 200 in turn # , 400 # , 600 # , 1000 # , 1200 # Grinding with sandpaper, ultrasonically cleaning aluminum alloy products with acetone, distilled water, and absolute ethanol 10 min , dry for later use;

[0033] (3) Preparation of micro-arc oxidation electrolyte: nano-zirconia particles 3.2g / L, nano-silicon carbide particles 3.2g / L, silicate 8g / L, potassium hydroxide 1g / L, borate 3g / L;

[0034] (4) Preparation of cold sealing solution: mainly nickel salt containing crystal water and alkali metal fluoride, in which the content of nickel acetate is 8.6g / L, and the content of sodium fluoride is 1.4g / L. The content of agent isopropanol is 0.05g / L, and the content of a kind of surfactant stearic acid is 0.05g / L, stir well, for subsequent use;

[0035] (5) Micro-arc oxidation: use the aluminum alloy product obtain...

Embodiment 3

[0038] (1) Sample preparation: Al6063 aluminum alloy is selected and processed into aluminum alloy products that meet the requirements;

[0039] (2) Pretreatment: use 200 in turn # , 400 # , 600 # , 1000 # , 1200 # Grinding with sandpaper, ultrasonically cleaning aluminum alloy products with acetone, distilled water, and absolute ethanol 10 min , dry for later use;

[0040] (3) Preparation of micro-arc oxidation electrolyte: nano-zirconia particles 4.8g / L, nano-silicon carbide particles 4.8g / L, silicate 8g / L, potassium hydroxide 1g / L, borate 3g / L;

[0041] (4) Preparation of cold sealing solution: mainly nickel salt containing crystal water and alkali metal fluoride, wherein the content of nickel acetate is 9g / L, and the content of sodium fluoride is 1.5g / L, a kind of dispersed preservative The content of isopropanol is 0.05g / L, the content of a kind of surfactant stearic acid is 0.05g / L, stir well, set aside;

[0042] (5) Micro-arc oxidation: use the aluminum alloy pro...

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Abstract

The invention relates to a preparation method of a wear-resistant toughened composite ceramic layer on the surface of an aluminum alloy product. The wear-resistant toughened composite ceramic layer is prepared by a micro-arc oxidation technology and a cold hole sealing method on the surface of the aluminum product for industrial use. The method comprises the following steps: forming a composite ceramic film layer on the surface of the aluminum alloy by the micro-arc oxidation process, wherein in the film layer, aluminum oxide is taken as a substrate, and dispersed silicon carbide nano-particles and zirconium oxide nano-particles are taken as toughened phases; then performing cold hole sealing on micro-holes of the composite ceramic film layer formed in the process of micro-arc oxidation, and generating nickel oxide and aluminum hydroxide filling phases in the micro-holes, so as to densify the composite ceramic film layer. The wear resistance, the corrosion resistance and the obdurability of the material are significantly improved through the composite film layer, so that the purpose of industrial use is achieved; and meanwhile the industrial application range of the material can be enlarged by the composite film layer.

Description

technical field [0001] The invention relates to a wear-resistant and toughened composite ceramic layer on the surface of an aluminum alloy product and a preparation method thereof, belonging to the field of industrial application. The wear-resistant and toughened composite ceramic layer is prepared on the surface of industrial aluminum alloy products by micro-arc oxidation technology and cold sealing method. The nano silicon carbide particles and nano zirconia particles are the composite ceramic membrane layer of the reinforcing phase; then, the micropores formed in the micro-arc oxidation process of the composite ceramic membrane layer are subjected to cold sealing treatment, and hydrogen oxidation is generated in the micropores. Nickel and aluminum hydroxide are used as filling phases to densify the composite ceramic film layer. Background technique [0002] Due to the advantages of low density, high specific strength, and easy forming and processing, aluminum alloys are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/18C25D15/00
Inventor 储成林郑妍宇郭超盛晓波董寅生
Owner SOUTHEAST UNIV
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