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Method for rapidly preparing titanium alloy bionic super-hydrophobic surface through femtosecond laser

A super-hydrophobic surface, femtosecond laser technology, applied in the direction of laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of adverse effects on the operator's environment and complicated processes, and achieve excellent and durable super-hydrophobic performance, simple process, easy to achieve effect

Active Publication Date: 2021-08-06
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are generally cumbersome, or use concentrated acid and alkali, which will adversely affect the operator and the environment.

Method used

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  • Method for rapidly preparing titanium alloy bionic super-hydrophobic surface through femtosecond laser
  • Method for rapidly preparing titanium alloy bionic super-hydrophobic surface through femtosecond laser
  • Method for rapidly preparing titanium alloy bionic super-hydrophobic surface through femtosecond laser

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A method for rapidly preparing a titanium alloy biomimetic superhydrophobic surface by using a femtosecond laser, the steps of which are as follows:

[0043] S1. Pretreatment: Pretreatment of the titanium alloy surface, including rough grinding, fine grinding, polishing and cleaning of the titanium alloy surface;

[0044] S2. Laser etching: use femtosecond laser to perform laser etching on the surface of the pretreated titanium alloy, and form a double-scale micro-nano structure on the surface of the titanium alloy, that is, form an ordered periodic micron-scale milk-like structure on the surface of the titanium alloy Protruding structure, nano-scale particle rod-like structure densely distributed on the papillae-like structure, after laser etching, the molten particles or impurity particles ablated on the surface of the titanium alloy are cleaned and removed;

[0045] The specific parameters of the laser etching are: laser wavelength 1030nm, laser spot size 30μm, laser...

Embodiment 2

[0051] A method for rapidly preparing a titanium alloy biomimetic superhydrophobic surface by using a femtosecond laser, the steps of which are as follows:

[0052] S1. Pretreatment: Pretreatment of the titanium alloy surface, including rough grinding, fine grinding, polishing and cleaning of the titanium alloy surface;

[0053] S2. Laser etching: use femtosecond laser to perform laser etching on the surface of the pretreated titanium alloy, and form a double-scale micro-nano structure on the surface of the titanium alloy, that is, form an ordered periodic micron-scale milk-like structure on the surface of the titanium alloy Protruding structure, nano-scale particle rod-like structure densely distributed on the papillae-like structure, after laser etching, the molten particles or impurity particles ablated on the surface of the titanium alloy are cleaned and removed;

[0054] The specific parameters of the laser etching are: laser wavelength 1030nm, laser spot size 30μm, laser...

Embodiment 3

[0058] This embodiment is basically the same as the second embodiment, the only difference is the laser etching parameters in step S2.

[0059] The specific parameters of laser etching in step S2 in this example are: laser wavelength 1030nm, laser spot size 30μm, laser pulse width 275fs, single pulse energy 3.4μJ, frequency 700kHz, scanning speed 700mm / s, scanning The pitch is 10 μm, the number of scans is 30, and the scan path is grid-like.

[0060] The static contact angle of the titanium alloy surface prepared in this example was measured on a contact angle measuring instrument, and the static contact angle was 151.2°, which met the requirement of a super-hydrophobic surface.

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Abstract

The invention discloses a method for rapidly preparing a titanium alloy bionic super-hydrophobic surface through femtosecond laser. The method comprises the following steps that S1, a titanium alloy surface is pretreated; S2, the femtosecond laser is adopted for conducting laser etching on the titanium alloy surface, a double-scale micro-nano structure is formed on the titanium alloy surface, namely, an orderly-arranged periodic micron-scale mastoid-like structure is formed on the titanium alloy surface, nanoscale particle rod-shaped structures are densely distributed on the mastoid-like structure, and ablated molten particles or impurity particles on the titanium alloy surface are cleaned and removed after laser etching; the specific parameters of the laser etching are as follows: the laser pulse width is 275fs, the single pulse energy is 3.1-3.6 mu J, the frequency is 50-900kHz, the scanning speed is 50-900mm / s, the scanning interval is 10-50 mu m, the scanning times is 10-30, and a scanning path is latticed; and S3, a titanium alloy subjected to laser etching is placed in a heat preservation furnace at the temperature of 130-170 DEG C to be subjected to heat preservation for 7.5-8.5 h, and after the titanium alloy is taken out, ablation fragments or pollutants on the surface of the titanium alloy are cleaned and removed. According to the method, the titanium alloy bionic super-hydrophobic surface can be simply and efficiently prepared.

Description

technical field [0001] The invention relates to a method for rapidly preparing a bionic superhydrophobic surface of a titanium alloy by using femtosecond laser etching combined with aging treatment, and belongs to the technical field of surface modification of metal substrates. Background technique [0002] As an alloy developed in the 1950s, titanium alloy is widely used in aerospace, marine ships, automobiles, medical treatment and other fields. Titanium alloys have many high-quality features: for example, the density of titanium alloys is only six tenths of steel, good biocompatibility, low elastic modulus and high hardness, low density and high specific strength, good low temperature performance and high temperature performance. Titanium alloys will inevitably encounter problems such as dust accumulation, icing and snow covering, biological adhesion and corrosive environment during application. If a super-hydrophobic surface is prepared on the surface of the titanium a...

Claims

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Application Information

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IPC IPC(8): B23K26/352B23K26/06B23K26/0622B23K26/362B23K26/60B23K26/70B23K26/40B23K103/14
CPCB23K26/355B23K26/0624B23K26/362B23K26/0626B23K26/60B23K26/70B23K26/40B23K2103/14
Inventor 庄园刘建宇杨涛汪远曾俊彦
Owner SOUTHWEST JIAOTONG UNIV
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