CN113146051B - High-flexibility preparation method of large-area microstructure on surface of amorphous alloy - Google Patents
High-flexibility preparation method of large-area microstructure on surface of amorphous alloy Download PDFInfo
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- CN113146051B CN113146051B CN202110442615.XA CN202110442615A CN113146051B CN 113146051 B CN113146051 B CN 113146051B CN 202110442615 A CN202110442615 A CN 202110442615A CN 113146051 B CN113146051 B CN 113146051B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
Abstract
The invention relates to a high-flexibility preparation method of an amorphous alloy surface large-area microstructure, and belongs to the technical field of material surface microstructure preparation. The method comprises the following steps: (1) grinding and polishing the surface of the amorphous alloy material, and then cleaning and drying; (2) performing nanosecond laser point irradiation on the surface of the amorphous alloy obtained in the step (1) by using argon as a protective gas according to set laser irradiation parameters to obtain a single-point micro-convex structure; (3) measuring the diameter of the single-point micro-convex structure, determining the relative position between adjacent irradiation points according to the shape and size requirements of the large-area micro-structure to be prepared, and then drawing a corresponding pattern in computer software; (4) and (4) controlling the track of the laser beam by means of a computer program to realize the processing of the pattern drawn in the step (3). The invention can flexibly prepare large-area microstructures with different shapes and sizes on the surface of the amorphous alloy, and has great application prospect in the fields of bionic surface science, mold forming, surface wettability regulation and the like.
Description
Technical Field
The invention relates to the technical field of material surface microstructure preparation, in particular to a high-flexibility preparation method of an amorphous alloy surface large-area microstructure, which has great application prospects in the fields of bionic surface science, mold forming, surface wettability regulation and control and the like.
Background
As a typical amorphous material, the atomic arrangement inside the amorphous alloy is in a short-range ordered and long-range disordered state. The special structure endows the amorphous alloy with a series of extraordinary and attractive properties, such as higher strength, hardness and fracture toughness, excellent biocompatibility and the like. Therefore, amorphous alloys are considered as functional materials with great potential for development. Meanwhile, research shows that the preparation of the large-area microstructure on the surface of the amorphous alloy has wide application prospect, and can be applied to various related fields such as surface wettability regulation, surface wear resistance, surface anti-icing and the like. At present, the preparation of large-area microstructures on the surface of an amorphous alloy material is commonly carried out by means of micro-cutting, thermoplastic forming and the like; the surface microstructure prepared by the micro-cutting technology needs an expensive ultra-precision machine tool and a micro-cutting tool, and meanwhile, for the amorphous alloy with higher hardness, the problem of serious tool abrasion is caused in the preparation process of the large-area microstructure, so that the regularity of the prepared microstructure is poor. The thermoplastic forming technology needs to prepare corresponding moulds in the realization process, and has complex process and poor flexibility. Besides these two common processing methods, the nanosecond laser technology is gradually applied to the preparation of the surface microstructure of the amorphous alloy in recent years. For example, Yunhu Zhu prepared periodic corrugated structures on bulk amorphous alloy surfaces by nanosecond Laser irradiation in 2016, Optics & Laser Technology, volumes 21-27(Effect of nano pulse Laser ablation on the surface morphology of Zr-based metallic glass). However, the waviness occurs only at the periphery of the ablated region, which is not suitable for large area processing, and in addition, the feature pitch is not controllable.
Therefore, a flexible and efficient method for preparing a large-area microstructure on the surface of the amorphous alloy is provided, the existing technical problems are solved, and the functional application of the amorphous alloy is further improved.
Disclosure of Invention
The invention aims to provide a high-flexibility preparation method of an amorphous alloy surface large-area microstructure, which solves the problems in the prior art. By using the method of the invention, large-area microstructures with different shapes and sizes, such as linear, dot matrix, circular, square and the like, can be flexibly and efficiently prepared by controlling the relative position between adjacent irradiation points in the process of irradiating the amorphous alloy by nanosecond laser, and the method has great application prospects in the fields of bionic surface science, mold forming, surface wettability regulation and the like.
The above object of the present invention is achieved by the following technical solutions:
a method for preparing a high-flexibility amorphous alloy surface large-area microstructure comprises the following steps:
(1) grinding and polishing the surface of the block amorphous alloy material to remove a surface oxide layer, then sequentially carrying out ultrasonic cleaning in ethanol and deionized water, and drying by using cold air to obtain a clean amorphous alloy surface;
(2) performing nanosecond laser point irradiation on the surface of the amorphous alloy obtained in the step (1) by using argon as a protective gas according to set laser irradiation parameters to obtain a single-point micro-convex structure;
(3) taking the amorphous alloy down, measuring the diameter of a single-point microprotrusion structure by using a laser confocal microscope, determining the relative position between adjacent irradiation points according to the shape and size requirements of a large-area microstructure to be prepared, and then drawing a corresponding pattern in computer software;
(4) and (4) controlling the track of the laser beam by means of a computer program to realize the processing of the pattern drawn in the step (3), and finally preparing a large-area microstructure on the surface of the amorphous alloy.
Further, the laser irradiation parameters in the step (2) are as follows: the laser wavelength is 1064nm, the pulse width is 7ns, the repetition frequency is 800kHz, the spot diameter is 43 mu m, and the peak laser power intensity is 3.6 multiplied by 1011～3×1012W/m2The number of laser pulses is 500-1000000, and the pressure of argon gas is 0.01-0.02 MPa.
The invention has the beneficial effects that: according to the method for preparing the amorphous alloy surface large-area microstructure with high flexibility, the large-area microstructures with different shapes and sizes can be prepared on the amorphous alloy surface by controlling the relative position between adjacent irradiation points. In addition, the method provided by the invention is flexible, controllable, efficient, green and environment-friendly, does not need expensive ultra-precision processing equipment, and has huge application prospects in the fields of bionic surface science, mold forming, surface wettability regulation and control and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
FIG. 1 is a schematic block diagram of a process of preparing a high-flexibility amorphous alloy surface large-area microstructure according to the present invention;
FIG. 2 is a three-dimensional topography of a single-point microprotrusion structure prepared using the present invention;
FIG. 3 is a cross-sectional profile of a single point microprotrusion structure prepared by the present invention;
FIG. 4 is a three-dimensional topography of a large area linear microstructure prepared using the present invention;
FIG. 5 is a three-dimensional topography of a large area lattice microstructure prepared using the present invention;
FIG. 6 is a three-dimensional topography of a large area circular microstructure made using the present invention;
FIG. 7 is a three-dimensional topography of a large area square microstructure prepared using the present invention.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1, the method for preparing a high-flexibility large-area microstructure on the surface of an amorphous alloy comprises the following steps:
(1) grinding and polishing the surface of the block amorphous alloy material to remove a surface oxide layer, then sequentially carrying out ultrasonic cleaning in ethanol and deionized water, and drying by using cold air to obtain a clean amorphous alloy surface;
(2) performing nanosecond laser point irradiation on the surface of the amorphous alloy obtained in the step (1) by using argon as a protective gas according to set laser irradiation parameters to obtain a single-point micro-convex structure;
(3) taking the amorphous alloy down, measuring the diameter of a single-point microprotrusion structure by using a laser confocal microscope, determining the relative position between adjacent irradiation points according to the shape and size requirements of a large-area microstructure to be prepared, and then drawing a corresponding pattern in computer software;
(4) and (4) controlling the track of the laser beam by means of a computer program to realize the processing of the pattern drawn in the step (3), and finally preparing a large-area microstructure on the surface of the amorphous alloy.
Further, the laser irradiation parameters in the step (2) are as follows: the laser wavelength is 1064nm, the pulse width is 7ns, the repetition frequency is 800kHz, the spot diameter is 43 mu m, and the peak laser power intensity is 3.6 multiplied by 1011～3×1012W/m2The number of laser pulses is 500-1000000, and the pressure of argon gas is 0.01-0.02 MPa.
Examples
The following is a typical zirconium-based amorphous alloy (Zr)41.2Ti13.8Cu12.5Ni10Be22.5) The surface preparation of large-area linear, lattice, circular and square microstructures is taken as an example to further illustrate the implementation process and the beneficial effects of the invention, and the specific implementation steps are as follows:
(1) and grinding and polishing the surface of the bulk amorphous alloy material by using grinding and polishing equipment, sequentially carrying out ultrasonic cleaning in ethanol and deionized water for about 30 minutes, and finally blowing dry by using cold air to obtain a clean amorphous alloy surface.
(2) Argon is used as a protective gas, nanosecond laser single-point irradiation is carried out on the surface of the amorphous alloy obtained in the step (1) according to set laser irradiation parameters, and the irradiation parameters are as follows: peak laser power intensity of 7.5 x 1011W/m2The number of laser pulses is 800 times, and the argon pressure is 0.01 MPa.
(3) Taking the amorphous alloy off, and acquiring a three-dimensional topography and a cross-sectional profile of the single-point microprotrusion structure by using a laser confocal microscope, as shown in fig. 2 and 3 respectively, it can be seen that the diameter of the single-point microprotrusion structure is about 92 μm.
(4) Drawing a pattern of a large-area microstructure to be processed by means of computer software, wherein the drawn pattern comprises: 1) large area linear microstructure pattern: the distance between adjacent irradiation points on each line is 45 mu m, and the distance between adjacent irradiation lines is 150 mu m; 2) large-area lattice microstructure pattern: the irradiation point interval is 135 mu m; 3) large area square microstructure pattern: the side length of the square pattern is 400 mu m, and 19 irradiation points are uniformly distributed on each side; 4) large area circular microstructure pattern: the diameter of the circular pattern is 400 μm, and 50 irradiation spots are uniformly distributed on the circumference.
(5) The laser beam trajectory is controlled by means of a computer program to realize large-area processing, and a laser confocal microscope is used to obtain the three-dimensional morphology of the large-area microstructure, as shown in fig. 4 (large-area linear microstructure), fig. 5 (large-area lattice microstructure), fig. 6 (large-area square microstructure) and fig. 7 (large-area circular microstructure).
The experimental result shows that the method provided by the invention can flexibly and efficiently prepare large-area microstructures with different shapes and sizes by using argon as protective gas and controlling the relative position between adjacent irradiation points in the process of irradiating the amorphous alloy by nanosecond laser, and has huge application prospects in the fields of bionic surface science, mold forming, surface wettability regulation and the like.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like of the present invention shall be included in the protection scope of the present invention.
Claims (1)
1. A method for preparing a high-flexibility amorphous alloy surface large-area microstructure is characterized by comprising the following steps:
(1) to block zirconium-based amorphous alloy Zr41.2Ti13.8Cu12.5Ni10Be22.5Grinding and polishing the surface of the material to remove a surface oxide layer, then sequentially carrying out ultrasonic cleaning in ethanol and deionized water, and drying by using cold air to obtain a clean amorphous alloy surface;
(2) performing nanosecond laser point irradiation on the surface of the amorphous alloy obtained in the step (1) by using argon as a protective gas according to set laser irradiation parameters to obtain a single-point micro-convex structure; the laser irradiation parameters are as follows: laser wavelength of 1064nm, pulse width of 7ns, repetition frequency of 800kHz, spot diameter of 43 μm, and peak laser power intensity of 7.5 × 1011W/m2The number of laser pulses is 800 times, and the argon pressure is 0.01 MPa;
(3) taking the amorphous alloy down, measuring the diameter of a single-point microprotrusion structure by using a laser confocal microscope, determining the relative position between adjacent irradiation points according to the shape and size requirements of a large-area microstructure to be prepared, and then drawing a corresponding pattern in computer software;
(4) and (4) controlling the track of the laser beam by means of a computer program to realize the processing of the pattern drawn in the step (3), and finally preparing a large-area microstructure on the surface of the amorphous alloy.
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