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A method for nanosecond laser irradiation to induce the formation of micro-nano multilayer structures on the surface of amorphous carbon

A multi-layer structure and laser irradiation technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of high cost and low efficiency of femtosecond or picosecond laser processing

Active Publication Date: 2021-07-06
JILIN UNIV
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Problems solved by technology

However, femtosecond or picosecond laser processing is more costly and less efficient

Method used

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  • A method for nanosecond laser irradiation to induce the formation of micro-nano multilayer structures on the surface of amorphous carbon
  • A method for nanosecond laser irradiation to induce the formation of micro-nano multilayer structures on the surface of amorphous carbon
  • A method for nanosecond laser irradiation to induce the formation of micro-nano multilayer structures on the surface of amorphous carbon

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Embodiment 1

[0032] The method for nanosecond laser irradiation in this embodiment to induce the formation of a micro-nano multilayer structure on the surface of amorphous carbon, the specific steps are as follows:

[0033] Step 1: The amorphous carbon sample with a diameter of 40 mm and a thickness of 10 mm is firstly polished, ultrasonically cleaned with absolute ethanol, and dried to obtain a pretreated amorphous carbon sample. The cleaning temperature is 50°C, and the single cleaning time is 5 minutes.

[0034] Step 2. The laser light generated by the nanosecond fiber laser is converted and focused by the galvanometer system, and then vertically incident on the surface of the amorphous carbon sample obtained in step 1; by controlling the irradiation time and energy density of the nanosecond laser pulse, using The material removal effect of laser and the interference effect of light are used to prepare micro-nano multi-layer structure on the surface of amorphous carbon. The laser proce...

Embodiment 2

[0038] The method for nanosecond laser irradiation in this embodiment to induce the formation of a micro-nano multilayer structure on the surface of amorphous carbon, the specific steps are as follows:

[0039] Step 1: The amorphous carbon sample with a diameter of 40 mm and a thickness of 10 mm is firstly polished, ultrasonically cleaned with absolute ethanol, and dried to obtain a pretreated amorphous carbon sample. The cleaning temperature is 50°C, and the single cleaning time is 5 minutes.

[0040] Step 2. The laser light generated by the nanosecond fiber laser is converted and focused by the galvanometer system, and then it is perpendicularly incident on the surface of the amorphous carbon sample obtained in step 1. By changing the laser processing parameters, a 5×5 multi-point array micro-nano multi-point array is prepared. layer structure. The laser processing parameters are as follows: the laser frequency is 700kHz, the pulse width is 7ns, the laser pulse duration is ...

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Abstract

The invention relates to a method for inducing nanosecond laser irradiation to form a micro-nano multilayer structure on the surface of amorphous carbon, and belongs to the technical field of laser surface modification. The method is as follows: the polished amorphous carbon sample is ultrasonically cleaned with absolute ethanol; the laser light generated by the nanosecond fiber laser is converted and focused by the vibrating mirror system, and then vertically incident on the surface of the amorphous carbon sample; the laser is controlled Pulse irradiation time and energy density, using laser material removal and light interference to prepare micro-nano multilayer structures on the surface of amorphous carbon. The micro-nano multilayer structure includes a micron-scale dimple-like structure and a nano-scale concentric ring structure. The method provided by the invention is simple and efficient, and the formed surface microstructure is regular and well-defined, which provides a feasible method for the efficient and large-area preparation of the micro-nano multilayer structure on the surface of amorphous carbon. It has broad application prospects in the field of catalytic characteristic adjustment and so on.

Description

technical field [0001] The invention relates to the technical field of laser surface modification, in particular to a method for inducing nanosecond laser irradiation to form a micro-nano multilayer structure on the surface of amorphous carbon. The invention can be applied to the fields of mould-forming, surface wettability, optical characteristics and catalytic characteristic adjustment to realize micro / nano multi-layer structure processing. Background technique [0002] Amorphous carbon is an amorphous structure composed of SP2 hybrid atoms, which has isotropic physical and chemical properties. At the same time, it also has the characteristics common to carbon materials, such as good thermal stability, wear resistance, chemical inertia etc. In addition, amorphous carbon also has excellent mechanical properties such as high hardness and Young's modulus. Due to these properties, amorphous carbon is widely used as a thermoforming mold material for precision glass instrument...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/60
CPCB23K26/352B23K26/60
Inventor 黄虎王超钱永峰崔明明洪婧
Owner JILIN UNIV
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