Laser processing method of carbon-coated metal micro-powder

A technology of metal micropowder and laser processing, applied in coatings and other directions, can solve the problem of less research on micron-scale powder carbon coating, and achieve the effect of improving application, low cost, and improving anti-oxidation performance.

Inactive Publication Date: 2012-07-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The above studies are limited to the surface coating of nano-sized particles, but there are few studies on carbon coating of micron-sized powders

Method used

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  • Laser processing method of carbon-coated metal micro-powder
  • Laser processing method of carbon-coated metal micro-powder
  • Laser processing method of carbon-coated metal micro-powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Disperse 0.1g of Ni micropowder in 10mL of ethanol, take 1mL and place it in a quartz tube with a diameter of 11mm. Under the condition of ultrasonic dispersion, place it under the parallel laser light.

[0040] Among them: when the laser is active, the solution emits a lot of heat, so an ice bath is added during the laser action to reduce the risk of operation through its cooling.

[0041] The finished solution is taken out, and due to the large particle size, the solvent and the powder particles can be separated by natural sedimentation without centrifugation.

[0042] Depend on figure 1 It can be seen that the morphology of the raw material Ni powder before processing; by figure 2 It can be seen that the morphology of the raw material Ni powder after processing; by image 3 It can be seen that the carbon coating on the surface of a single particle of the raw material Ni powder after treatment.

Embodiment 2

[0044] Disperse 0.1g of Ni micropowder in 15mL of ethanol, take 1mL and place it in a quartz tube with a caliber of 11mm, and the rest of the steps are the same as in Example 1.

Embodiment 3

[0046] Disperse 0.1g of Ni micropowder in 25mL of ethanol, take 1mL and place it in a quartz tube with a caliber of 11mm, and the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a method for carrying out treatment and carbon coating of metal powder by utilizing laser. The method comprises the following steps: (a) dispersing the metal powder into ethanol, (b) treating the solution under laser in the conditions of ultrasonic dispersion and ice bath for 20ms to 1 hour, and (c) standing the treated product, and separating solvent from the metal powder by natural sedimentation to obtain the carbon-coated metal micro-powder. The invention provides a simple, rapid, safe, controllable and low-cost method for carrying out treatment and carbon coating of the metal powder. The prepared carbon-coated metal powder is uniform in size distribution and good in dispersibility; and the inoxidizability of the carbon-coated metal powder is better improved. In addition, the metal powder has excellent physical and chemical properties, so that the use temperature range of the metal powder can be better expanded. The pattern of the Ni-C powder treated by laser is shown in an abstract figure.

Description

technical field [0001] The invention relates to a method for surface treatment of metal powder, in particular to a method for preparing carbon-coated metal micropowder by using a simple green laser treatment process. Background technique [0002] For pure metal powders, their application fields are very wide. For example, nickel micropowder has a wide range of applications in aerospace, atomic energy industry, electronics, energy, special materials, fermentation and medical industries. It can be used as adhesive guide, super large capacity Capacitors, magnetic materials, fuel cells, welding materials for metal and glass ceramics, special cold-proof fibers, cathode ray tube aerosols, pigments and coating materials, raw materials for diamond cutting tools, etc. Micron-sized copper powder has many excellent physical properties and catalytic activity, and is widely used in conductive coatings, electrode materials, catalysts and other fields. However, when the metal micropowder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02
Inventor 杜希文邵玉苓崔兰
Owner TIANJIN UNIV
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