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Metal-based nano composite powder material, preparation method and application thereof

A metal powder and nano-composite technology, applied in metal processing equipment, additive processing, transportation and packaging, etc., to achieve the effects of good fluidity, high sphericity, and high bulk density

Active Publication Date: 2020-06-05
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can realize the deagglomeration of nanoparticles and the coating process of alloy powder in the liquid phase, the nanoparticles are easy to re-agglomerate on the surface of the alloy powder during the stirring, drying and sieving process of the liquid phase, and the prepared composite powder material In the alloy powder surface, there are large nanoparticle aggregates

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  • Metal-based nano composite powder material, preparation method and application thereof
  • Metal-based nano composite powder material, preparation method and application thereof
  • Metal-based nano composite powder material, preparation method and application thereof

Examples

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no. 1 example

[0051] In a first exemplary embodiment of the present disclosure, a method for preparing a metal matrix nanocomposite powder material is provided.

[0052] figure 1 It is a flowchart of a method for preparing a metal-based nanocomposite powder material according to an embodiment of the present disclosure. figure 2 For such figure 1 Schematic diagram of the implementation of the preparation method of the metal-based nanocomposite powder material shown.

[0053] refer to figure 1 and figure 2 As shown, the preparation method of the metal-based nanocomposite powder material in this embodiment includes: step S11, step S12 and step S13.

[0054] In step S11, micron-scale spherical metal powder and nano-scale reinforcing phase powder are prepared.

[0055] In the step S11 , it includes: sieving the micron-sized spherical metal powder to obtain the micron-sized spherical metal powder with a particle size of 20 μm˜60 μm.

[0056] In an embodiment of the present disclosure, the...

no. 2 example

[0088] In a second exemplary embodiment of the present disclosure, a metal matrix nanocomposite powder material is provided, the metal matrix nanocomposite powder is prepared by the above preparation method.

[0089] The metal-based nanocomposite powder material is a composite material of micron-scale spherical metal powder and nano-scale strengthening phase powder, wherein the micron-scale spherical metal powder includes several spherical metal powder particles; the surface of the metal powder particles is evenly coated with non-agglomerated nano-scale strengthening phase powder particles.

[0090] In one embodiment, the tungsten-based composite powder prepared by the above preparation method is taken as an example.

[0091] In this embodiment, spherical tungsten powder with a particle size of 20 μm to 30 μm and La with a particle size of 40 nm 2 o 3 The powder is used as raw material, with 99% by mass of spherical tungsten powder, 1% of La 2 o 3The powder is the material...

no. 3 example

[0099] In the third exemplary embodiment of the present disclosure, a raw material for metal additive manufacturing, powder injection molding and other powder metallurgy is provided, which is prepared by any of the above-mentioned preparation methods or includes any of the above-mentioned metal-based Nanocomposite powder materials. Due to the good fluidity and high bulk density of the metal-based nanocomposite powder materials prepared by the above preparation method, they can be used as raw materials for metal additive manufacturing, powder injection molding or other powder metallurgy processes, and can solve the problem of high-energy ball milling in the preparation of composite powders. The technical problems of poor fluidity, easy introduction of impurities, and the difficulty of preparing composite powders uniformly coated with reinforcing phase particles without agglomeration by conventional coating technology.

[0100] To sum up, the present disclosure provides a metal-...

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Abstract

The invention provides a metal-based nano composite powder material, a preparation method and application thereof. The preparation method comprises the following steps of preparing micron-sized spherical metal powder and nano-sized strengthening phase powder, and placing the micron-sized spherical metal powder and the nano-sized strengthening phase powder in a mixing tank according to a predetermined proportion for mixing operation to obtain pre-coated powder with a preliminary coating effect; and treating the pre-coated powder by using high-energy mechanical dispersion equipment, wherein thehigh-energy mechanical dispersion equipment comprises a grinding cavity and a rotor with a rotating speed of 104 revolutions per minute or above, the high-speed rotation of the rotor and the airflow generated by the rotor are used in the grinding cavity to drive the pre-coated powder to collide with each other and shear, and the nano-particle agglomeration on the surface of the pre-coated powder is released to obtain the metal-based nano composite powder material with the nano-sized strengthening phase powder particles uniformly coated on the surfaces of the metal powder particles. The composite powder material has good fluidity, high apparent density and mature and stable process, is suitable for large-scale industrial production, and can be applied to the fields of metal additive manufacturing, powder injection molding and the like.

Description

technical field [0001] The disclosure belongs to the technical field of powder metallurgy and metal additive manufacturing, and relates to a metal-based nanocomposite powder material, a preparation method and an application thereof. Background technique [0002] Metal-based nanocomposites are new composite materials composed of metals and their alloys as the matrix and one or more nanoscale metal or non-metallic particles as the reinforcing phase. Compared with traditional metal matrix composites, the interfacial bonding force of metal matrix nanocomposites is stronger, and the distribution of nano-reinforced phases in the matrix is ​​more uniform, so this material can overcome some limitations of single materials or traditional metal matrix composites, It has higher specific strength, specific modulus and other properties. At present, metal-based nanocomposites represented by titanium carbide-reinforced titanium alloys, silicon carbide-reinforced aluminum alloys, and oxide...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F1/00B22F9/04B22F3/22B33Y70/10
CPCB22F9/04B22F3/225B33Y70/00B22F2009/043B22F1/052B22F1/065B22F1/16
Inventor 王道宽易新庞甲飞
Owner PEKING UNIV
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