A Method for Improving the Wettability of Metal Surfaces Using High Energy Beam Texturing

A technology of wettability and texture, which is applied in the field of metal surface treatment and surface treatment, and can solve the problems of increasing the effective contact area between glass and metal, poor wettability, and low connection strength

Active Publication Date: 2017-12-15
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of poor wettability and low connection strength between glass and metal, the present invention proposes a method for roughening the metal surface with high-energy beams to improve the wettability of glass on the metal surface. By increasing the roughness of the metal surface, Increase the effective contact area between glass and metal, enhance the mechanical-chemical combination of glass and metal, and improve the bonding strength of glass-metal

Method used

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  • A Method for Improving the Wettability of Metal Surfaces Using High Energy Beam Texturing
  • A Method for Improving the Wettability of Metal Surfaces Using High Energy Beam Texturing
  • A Method for Improving the Wettability of Metal Surfaces Using High Energy Beam Texturing

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Effect test

Embodiment 1

[0050] The specific steps for improving the wettability of borosilicate glass on the surface of Kovar alloy by electron beam texturing are as follows:

[0051] (1) After the Kovar alloy plate is ground sequentially with 200# to 1200# metallographic sandpaper, it is ultrasonically cleaned with acetone and alcohol solution, dried and placed in a desiccator;

[0052] (2) Electron beam texturization: the Kovar alloy is texturized by electron beams, and two texturized shapes, helical and hexagonal, are obtained, such as figure 1 and figure 2 shown;

[0053] (3) In the atmospheric environment, the Kovar alloy sample is oxidized with a resistance furnace to obtain a composition of Fe 3 o 4 and Fe 2 o 3 oxide film;

[0054] (4) Heat borosilicate glass above the softening temperature, measure the wetting angle of borosilicate glass on the surface of Kovar alloy, and the relationship between the wetting angle of borosilicate glass on the surface of Kovar alloy with different surf...

Embodiment 2

[0056] (1) After the Kovar alloy plate is ground sequentially with 200# to 1200# metallographic sandpaper, it is ultrasonically cleaned with acetone and alcohol solution, dried and placed in a desiccator;

[0057] (2) Fiber laser texturization: use PLY-20M SCANLAB 10 fiber laser to texturize Kovar alloy, and obtain lattice texturization morphology with hole spacing of 0.3mm, 0.4mm, 0.5mm, 0.6mm and 0.7mm , polishing the textured Kovar alloy, the textured appearance is as follows image 3 shown;

[0058] (3) In the atmospheric environment, the Kovar alloy sample is oxidized with a resistance furnace to obtain a composition of Fe 3 o 4 and Fe 2 o 3 oxide film;

[0059] (4) After heating the borosilicate glass from room temperature to 1000°C and keeping it warm for 20 minutes, cool it to room temperature with the furnace, and measure the wetting angle of the borosilicate glass on the surface of the Kovar alloy. The relationship curve between the wetting angle of the surface...

Embodiment 3

[0061] (1) After the Kovar alloy plate is ground sequentially with 200# to 1200# metallographic sandpaper, it is ultrasonically cleaned with acetone and alcohol solution, dried and placed in a desiccator;

[0062] (2) Femtosecond laser texturing: After polishing the Kovar alloy plate in step (1), adopt TC-22A type yttrium-doped fiber femtosecond laser to texturize the Kovar alloy, and the obtained hole spacing is respectively 0.05mm, 0.10mm, 0.15mm, 0.20mm and 0.25mm lattice roughening morphology, the textured Kovar alloy is polished, the textured appearance is as follows Figure 4 shown;

[0063] (3) In the atmospheric environment, the Kovar alloy sample is oxidized with a resistance furnace to obtain a composition of Fe 3 o 4 and Fe 2 o 3 oxide film;

[0064] (4) Heat the borosilicate glass from room temperature to 1000°C for 20 minutes, then cool it to room temperature with the furnace, and measure the wetting angle of the borosilicate glass on the surface of the Kovar...

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Abstract

The invention discloses a method for improving the wettability of a metal surface by adopting high-energy beam roughening, which belongs to the technical field of metal surface treatment. The present invention first uses high-energy beams (electron beams, laser beams) to texturize the surface of the Kovar alloy to form regularly arranged different textured morphologies to obtain metal surfaces with different roughness and texturized point density; then the metal surface is textured Oxidation to obtain an oxide layer with a certain composition; finally, the borosilicate glass is heated above the softening temperature by the sessile drop method to test the wettability of the glass on the metal surface. The high-energy beam roughening promotes the wetting and spreading of molten glass on the metal surface, increases the contact area between glass and metal, and effectively promotes the mechanical-chemical bonding of glass-metal.

Description

technical field [0001] The invention relates to a surface treatment method, in particular to a method for improving the wettability of a metal surface by using a high-energy beam texturing technique, and belongs to the technical field of metal surface treatment. Background technique [0002] There are many methods to improve the wettability and spreadability of solder on the surface of the base metal. Among them, the surface treatment methods of the base metal include electroplating, deposition, ion implantation, surface alloying, etc. Most of these methods start with changing the chemical composition / composition of the base metal surface, and then Wettability and spreadability can be improved by changing the complex material transport process such as adsorption, diffusion, reaction, and dissolution between the solder and the base metal. However, there are few studies on promoting the wetting and spreading of solder on the surface of the base metal by changing the surface ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C27/02
Inventor 栗卓新铁敏李红
Owner BEIJING UNIV OF TECH
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