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Method for preparing micro-concave and micro-convex structures on amorphous alloy through nanosecond laser irradiation

An amorphous alloy, laser irradiation technology, applied in laser welding equipment, welding equipment, manufacturing tools and other directions, can solve the problem of unrealized micro-convex structure, and achieve the effects of low cost, simple method and broad application prospects

Active Publication Date: 2021-04-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, up to now, the preparation of regular micro-convex structures on the surface of amorphous alloys by direct nanosecond laser irradiation has not been realized.

Method used

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  • Method for preparing micro-concave and micro-convex structures on amorphous alloy through nanosecond laser irradiation
  • Method for preparing micro-concave and micro-convex structures on amorphous alloy through nanosecond laser irradiation
  • Method for preparing micro-concave and micro-convex structures on amorphous alloy through nanosecond laser irradiation

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Embodiment 1

[0038] see Figure 4 and Figure 5 Shown is the three-dimensional morphology and cross-sectional profile of the surface microstructure of the amorphous alloy prepared by nanosecond laser irradiation in this embodiment. The selected laser peak power intensity is 2.4 × 10 11 W / m 2 , the number of laser pulses is 1000 times, and the argon pressure is 0.01MPa. It can be seen from the figure that under the irradiation parameters of this embodiment, a dimple structure is formed on the surface of the amorphous alloy. Wherein, the diameter of the dimple structure is about 50 μm, and the pit depth is about 640 nm.

Embodiment 2

[0040] see Image 6 and Figure 7 Shown is the three-dimensional morphology and cross-sectional profile of the surface microstructure of the amorphous alloy prepared by nanosecond laser irradiation in this embodiment. The selected laser peak power intensity is 2 × 10 12 W / m 2 , the number of laser pulses is 1000 times, and the argon pressure is 0.01MPa. It can be found that by increasing the peak laser power intensity while keeping the number of laser pulses constant, a regular micro-convex structure is obtained on the surface of the amorphous alloy. Wherein, the diameter of the micro-protrusion structure is about 165 μm, and the height of the protrusion is about 820 nm.

Embodiment 3

[0042] see Figure 8 and Figure 9 Shown is the three-dimensional morphology and cross-sectional profile of the surface microstructure of the amorphous alloy prepared by nanosecond laser irradiation in this embodiment. The selected laser peak power intensity is 1 × 10 12 W / m 2 , the number of laser pulses is 50, and the argon pressure is 0.01MPa. It can be seen from the figure that under the irradiation parameters of this embodiment, a dimple structure is formed on the surface of the amorphous alloy. Wherein, the diameter of the dimple structure is about 53 μm, and the pit depth is about 115 nm.

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Abstract

The invention relates to a method for preparing micro-concave and micro-convex structures on amorphous alloy through nanosecond laser irradiation, and belongs to the field of processing of micro-nano structures on the surface of amorphous alloy. The method comprises the steps that the surface of a amorphous alloy material is ground and polished, and then the surface is cleaned and dried; and nanosecond laser point irradiation is conducted on the surface of the amorphous alloy by taking argon as a protective gas, a coupling action relationship between the recoil pressure of an irradiation point and a Marangoni effect is regulated and controlled by controlling peak laser power intensity and the number of laser pulses, and then, the micro-concave structure or the micro-convex structure is formed in an irradiation point region through inducing. According to the method, based on the amorphous alloy melt flow effect induced by nanosecond laser irradiation, the regular micro-concave or micro-convex structure can be prepared on the surface of the amorphous alloy by simply changing laser irradiation parameters, and the method has the advantages of simplicity, convenience, flexibility, quickness, controllability, low cost and the like, and has wide application prospects in the fields of biomedicine, micro-optical systems, micro-fluidic control and the like.

Description

technical field [0001] The invention relates to a method for preparing micro-nano structures on the surface of amorphous alloys, in particular to a method for preparing micro-concave and convex structures of amorphous alloys by nanosecond laser irradiation. The method for preparing the micro-concave and micro-convex structures on the surface of the amorphous alloy has many advantages such as simplicity, flexibility, speed, controllability, and low cost, and has broad application prospects in the fields of biomedicine, micro-optical systems, and microfluidics. Background technique [0002] Compared with traditional metals and crystalline alloys, there are no defects such as grain boundaries and dislocations inside amorphous alloys, and its intrinsic isotropy makes it have excellent mechanical, physical and chemical properties, such as higher strength and hardness , excellent wear resistance and corrosion resistance, etc. These excellent properties make amorphous alloys have ...

Claims

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Application Information

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IPC IPC(8): B23K26/352B23K26/60
CPCB23K26/60B23K26/355
Inventor 黄虎钱永峰王超崔明明洪婧张洪洋
Owner JILIN UNIV
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