Method for improving metal surface wettability by high energy beam texturing

A wettability and high-energy technology, applied in the field of metal surface treatment and surface treatment, can solve the problems of low connection strength, increasing the effective contact area between glass and metal, and poor wettability.

Active Publication Date: 2015-07-22
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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  • Method for improving metal surface wettability by high energy beam texturing
  • Method for improving metal surface wettability by high energy beam texturing
  • Method for improving metal surface wettability by high energy beam texturing

Examples

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Comparison scheme
Effect test

Embodiment 1

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

[0051] (1) After smooth grinding the Kovar alloy plate with 200# to 1200# metallographic sandpaper in turn, ultrasonically clean it with acetone and alcohol solution, dry it and place it in a desiccator;

[0052] (2) Electron beam texturing: Kovar alloy is texturized by electron beam, and two textured morphologies of helical and hexagonal are obtained, such as figure 1 and figure 2 shown;

[0053] (3) In the atmospheric environment, the Kovar alloy sample was oxidized with a resistance furnace, and the composition was Fe. 3 O 4 and Fe 2 O 3 the oxide film;

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

Embodiment 2

[0056] (1) After smooth grinding the Kovar alloy plate with 200# to 1200# metallographic sandpaper in turn, ultrasonically clean it with acetone and alcohol solution, dry it and place it in a desiccator;

[0057] (2) Fiber laser texturing: PLY-20M SCANLAB 10 fiber laser was used to texturize Kovar alloy, and lattice textured morphologies with hole spacings of 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm and 0.7 mm were obtained. , the textured Kovar alloy is polished, and the textured appearance is as follows image 3 shown;

[0058] (3) In the atmospheric environment, the Kovar alloy sample was oxidized with a resistance furnace, and the composition was Fe. 3 O 4 and Fe 2 O 3 the oxide film;

[0059] (4) After heating the borosilicate glass from room temperature to 1000 °C for 20 min, and cooling it to room temperature with the furnace, the wetting angle of the borosilicate glass on the Kovar alloy surface was measured. The relationship between the wetting angle of the surface and th...

Embodiment 3

[0061] (1) After smooth grinding the Kovar alloy plate with 200# to 1200# metallographic sandpaper in turn, ultrasonically clean it with acetone and alcohol solution, dry it and place it in a desiccator;

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

[0063] (3) In the atmospheric environment, the Kovar alloy sample was oxidized with a resistance furnace, and the composition was Fe. 3 O 4 and Fe 2 O 3 the oxide film;

[0064] (4) After heating the borosilicate glass from room temperature to 1000 °C for 20 min, and cooling it to room temperature with the furnace, the wetting angle of the borosilicate glass on the Kovar alloy surfa...

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Abstract

Belonging to the technical field of metal surface treatment, the invention provides a method for improving metal surface wettability by high energy beam texturing. The method includes: firstly adopting high energy beam (electron beam and laser beam) to texture a kovar alloy surface to form regularly arranged different texturing shapes so as to obtain a metal surface with different roughness and texturing point density; then oxidizing the metal surface to obtain an oxide layer with certain component; and finally heating borosilicate glass to a temperature above the softening temperature by a sessile drop technique, and testing the wettability of glass on the metal surface. High energy beam texturing promotes wetting spreading of molten glass on the metal surface, increases the contact area between glass and metal, and effectively promotes mechanical-chemical combination 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 adopting a high-energy bundle texturing technology, and belongs to the technical field of metal surface treatment. Background technique [0002] There are many ways to improve the wettability and spreadability of the 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 from changing the chemical composition / composition of the base metal surface, and then The wetting and spreading properties are improved by changing the complex material transport processes 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 the solder on the surface of the base metal by changi...

Claims

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Application Information

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