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Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect

A nano-coating and preparation device technology, which is applied in coatings, metal material coating processes, etc., can solve problems such as inappropriate preparation of thicker coatings, difficult to handle parts, low efficiency, etc., to improve interface bonding strength and mechanical properties high performance, avoid thermal damage, and high efficiency

Inactive Publication Date: 2010-07-28
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

But this method has less impact force and lower strain rate, about 10 3 -10 4 the s -1 , so that the interface bonding of the coating is relatively weak, it is not suitable to prepare thick coatings, the efficiency is also low, and it is difficult to handle parts with complex shapes

Method used

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  • Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect
  • Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect

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preparation example Construction

[0034] The device of the nano-coating preparation method based on the ultra-fast ultra-high pressure photomechanical effect, such as figure 1 shown, including:

[0035] Three-dimensional six-axis worktable (1), water tank (2), fixture (4), thermocouple (5), coaxial synchronous water feeder (10), laser focusing system (12), 45° full reflection mirror (13), Laser beam optimization system and nanosecond laser (21), wherein a water tank (2) with a water outlet pipe (3) at the bottom of the side is placed on a computer-controlled three-dimensional six-axis workbench (1), and the bottom of the water tank (2) is automatically A metal substrate (6) coated with nanoparticles (7) on the surface covered with black paint (8) is fixed with a clamp (4), and a laser shock confinement layer (9) and a laser focusing system are arranged directly above the metal substrate (6) (12) and a 45 ° total reflection mirror (13), on one side of the 45 ° total reflection mirror (13) is a laser beam optim...

Embodiment 1

[0040] 1) Select nano Fe-Ni powder for surface treatment, the average particle size is about 200nm;

[0041] 2) Select the AZ91D Mg alloy substrate to be treated, and carry out pretreatment on the Mg alloy substrate, including grinding, polishing, and then cleaning it with alcohol in ultrasonic waves;

[0042] 3) The nano-Fe-Ni powder selected in step 1) is made into an alcohol suspension and coated on the Mg alloy substrate treated in step 2), and left to dry, the thickness of the pre-coating layer is 500 μm;

[0043] 4) the whole surface of the Mg alloy coated with nanometer Fe-Ni powder prepared by step 3) is wrapped up with black paint, and the black paint is used as the absorbing layer simultaneously;

[0044] 5) The laser beam optimization system is used to optimize the selection of the laser beam, so that the output laser beam is evenly distributed in space, guided by a 45° full mirror, and then the laser beam is focused by the laser focusing system, with a spot diamete...

Embodiment 2

[0047] 1) Select nano-AlN powder for surface treatment, the average particle size is about 100nm;

[0048] 2) Select the pure Al metal substrate to be treated, and perform pretreatment on the pure Al metal substrate, including grinding, polishing, and then cleaning it with alcohol in ultrasonic waves;

[0049] 3) The nano-AlN powder selected in step 1) is made into an alcohol suspension and coated on the pure Al substrate treated in step 2), and left to dry, the thickness of the pre-coating layer is 100 μm;

[0050] 4) the whole surface of the pure Al substrate coated with nano-AlN powder prepared in step 3) is wrapped up with black paint, and the black paint is used as the absorbing layer simultaneously;

[0051] 5) The laser beam optimization system is used to optimize the selection of the laser beam, so that the output laser beam is evenly distributed in space, guided by a 45° full mirror, and then the laser beam is focused by the laser focusing system, with a spot diameter...

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Abstract

The invention discloses nano coating method and device based on ultrafast ultrahigh pressure photodynamics effect, belonging to the technical field of material surface. The invention is characterized by embedding or cold welding nanometer metal powder, nanometer nonmetal powder or compound nanometer powder which are precoated on the surface of a metal matrix in the surface layer of the metal matrix by means of laser induction mechanics effect, forming a thick nanometer particle strengthening layer or a coating layer which is called as a nano coating on the surface of the metal matrix, wherein the metal matrix is impacted and strengthened by laser. The device comprises a three-dimensional hexad working platform, a water tank, a clamp, a thermocouple, a coaxial synchronous water sender, a laser beam focusing system, a 45-degree fully-reflecting mirror, a laser beam optimizing system and a nanosecond laser. By the invention, the obtained surface nano coating has firm interface joint with the matrix and the mechanical property on the surface of the metal matrix is remarkably improved. The invention has simple technical process and lower cost, and is easy to realize automation and suitable for large-scale batch production.

Description

technical field [0001] The invention relates to the technical field of material surfaces, in particular to a method and device for preparing nano-coatings based on ultra-fast and ultra-high pressure photomechanical effects, which mainly utilizes laser-induced mechanical effects to change the surface organization and composition of materials to enhance the surface properties of metal materials. Background technique [0002] Because nano-coatings have good wear and corrosion resistance, heat insulation properties, thermal vibration resistance and excellent mechanical properties, they have attracted the attention of many researchers at home and abroad, and methods for preparing nano-coatings have been studied. The methods of preparing nano-coatings at high temperature mainly include thermal spraying, laser cladding nanoparticles, etc., but these methods are easy to cause oxidation, phase change and grain growth of nano-powders under the action of high temperature, which are not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 崔承云张永康崔熙贵张朝阳鲁金忠钱晓明管海兵
Owner JIANGSU UNIV
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