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Preparation method of anti-radiation reinforced composite coating on aluminum alloy surface

An aluminum alloy surface, radiation-resistant reinforcement technology, applied in the direction of heating inorganic powder coating, pressure inorganic powder coating, etc., can solve the problems of poor bonding, low density of radiation-resistant reinforcement coating, etc., achieve high density, solve Compatibility, effect of lowering process temperature

Active Publication Date: 2021-05-11
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a method for preparing a radiation-resistant and reinforced composite coating on the surface of an aluminum alloy, aiming at the shortcomings of the existing aluminum alloy radiation-resistant reinforced coating, such as low density and poor bonding with the substrate, and the composite coating prepared by the method It has the advantages of high density, high strength, good combination with the matrix, and low cost.

Method used

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  • Preparation method of anti-radiation reinforced composite coating on aluminum alloy surface
  • Preparation method of anti-radiation reinforced composite coating on aluminum alloy surface

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In this embodiment, the composition of the anti-radiation and strengthening composite coating on the surface of the aluminum alloy is composed of 76% tungsten and 24% pure aluminum according to the mass percentage. The preparation method of the anti-radiation and strengthening composite coating on the surface of the aluminum alloy is carried out according to the following steps:

[0022] Use a 6063 aluminum alloy sheet of 80mm×80mm×4mm, use sandpaper and polishing cloth to polish the surface of the aluminum alloy to be coated, after polishing, place the aluminum alloy sheet in acetone solution, ultrasonically clean it for 10 minutes, take it out, clean it with alcohol, and then blow it Dry.

[0023] Paste the aluminum alloy sheet to the bottom of the stainless steel ball mill jar and press it tightly. Weigh 450g of tungsten powder with a particle size (D50) of 12μm, 50g of aluminum powder with a diameter of 10μm and 2.5kg of stainless steel balls into a ball mill jar, a...

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 is that the mass of tungsten powder is changed from 450g to 300g, the quality of aluminum powder is changed from 50g to 200g, and the ball milling time is changed from 15 hours to 10 hours under the condition of rotating speed of 300 rpm. The pressing temperature rises from 550°C to 490°C, and the pressure changes from 75MPa to 50MPa.

[0026] The obtained composite coating with a thickness of 1mm can reach 85% of the X-ray shielding efficiency of 40KeV energy, and can reach 50% of the X-ray shielding efficiency of 100KeV energy.

Embodiment 3

[0028] The difference between this embodiment and embodiment 2 is that the weight of the tungsten powder is changed from 300g to 180g, and the weight of the aluminum powder is changed from 200g to 320g. The vacuum hot pressing temperature was changed from 490°C to 480°C, and the pressure was changed from 50MPa to 30MPa.

[0029] The obtained composite coating with a thickness of 1 mm can achieve 50% X-ray shielding efficiency to 40KeV energy, and 30% X-ray shielding efficiency to 100KeV energy.

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Abstract

The invention discloses a preparation method of a radiation-resistant and reinforced composite coating on the surface of an aluminum alloy, which comprises the following steps: (1) pretreating the surface of a substrate aluminum alloy; (2) fixing the pretreated aluminum alloy sheet to a stainless steel At the bottom of the ball milling tank, mix tungsten powder, aluminum powder or aluminum alloy powder according to the ratio and put them into the ball milling tank. The weight ratio of stainless steel balls to powder is 5:1. Use a planetary ball mill in a vacuum or argon-protected environment Ball milling at a speed of 100 rpm for 1 hour, and then high-energy ball milling at a speed of 300 rpm for 5 to 20 hours to obtain a radiation-resistant and reinforced composite coating on the surface of the aluminum alloy; (3) Densification treatment by vacuum hot pressing (4) Obtain the anti-radiation reinforced composite coating on the surface of the aluminum alloy through surface finishing and machining. The anti-radiation reinforced composite coating on the aluminum alloy surface prepared by the method of the invention has the characteristics of high density, strong interface binding force and good shielding performance, and has great application potential.

Description

technical field [0001] The invention relates to a preparation method of a radiation-resistant and reinforced composite coating on the surface of an aluminum alloy, and belongs to the technical field of preparation of an aluminum alloy composite coating. Background technique [0002] In a radiation environment, the interaction between rays and electronic devices will cause the electronic system to ionize or excite electrons, which will cause the performance of the entire electronic system to degrade or even fail. The rapid development of aerospace and electronic technology promotes the development and application of new materials and new microelectronic devices, and these materials and devices are more sensitive to radiation effects, which increases the possibility of failures induced by radiation environments. Therefore, it poses a serious threat to the life of satellites in orbit, the reliable operation of spacecraft and the safe use of nuclear industry equipment. By coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/06C23C24/08
Inventor 王健梁秋实马书旺杨剑杨志民毛昌辉刘坤吕政
Owner GRIMAT ENG INST CO LTD