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Nano ceramic metal composite powder for 3D printing and application

A 3D printing and metal composite technology, applied in metal processing equipment, transportation and packaging, additive processing, etc., can solve the problems of easy agglomeration of nano-ceramic particles, poor matrix interface bonding, poor wettability, etc., and achieve nano-ceramic phase distribution. The effect of uniformity, solving agglomeration and low cost

Active Publication Date: 2020-11-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the fact that the currently prepared nano-ceramic metal composite powder is difficult to meet the requirements of 3D printing technology for powder sphericity, fluidity and particle size distribution, and during the preparation of nano-ceramic phase-reinforced metal matrix composites, nano-ceramic particles are easy to agglomerate and interface with the matrix. To solve the problem of poor bonding, the present invention proposes a nano-ceramic-metal composite powder for 3D printing and its application. Micron-sized ceramic particles are used as raw materials to prepare nano-ceramic-metal spherical composite powder, and nano-ceramic-reinforced composite powder is prepared by 3D printing technology. metal composite
In the process of 3D printing, Marangoni convection is used to stir the melt, which promotes the rearrangement of ceramic particles in the melt, realizes the uniform distribution of nano-ceramic phases in the melt, solves the problem of nano-ceramic phase agglomeration, and rapidly solidifies to obtain nano-ceramics Solidification structure with uniform distribution of phases; through high-temperature melting and rapid solidification of laser or electron beams, the problem of interface defects caused by poor wettability between the ceramic reinforcement phase and the metal matrix is ​​solved; micron-sized ceramic particles are used to realize uniform dispersion through nanometerization , low cost; parts with arbitrary complex shapes can be prepared in one piece, improving material utilization

Method used

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  • Nano ceramic metal composite powder for 3D printing and application

Examples

Experimental program
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Embodiment 1

[0043] A nano-ceramic-metal composite powder for 3D printing and its application, with René 104 nickel-based superalloy as the matrix, TiC ceramic particles with an average particle size of 2.5 μm as the reinforcing phase, and the added mass percentage is 2.0%.

[0044] The matrix material is René104 nickel-based superalloy spherical powder with a particle size of 15-53 μm. The composition of René104 nickel-based superalloy is: 20.6Co~13Cr~3.4Al~3.9Ti~3.8Mo~2.1W~2.4Ta~0.9Nb ~0.05Zr~0.03B~0.04C~the balance is Ni.

[0045] Described a kind of nano ceramic metal composite powder and application for 3D printing, the steps are as follows:

[0046] (1) First mix TiC ceramic particles with an average particle size of 2.5 μm and part of the René104 nickel-based superalloy powder (ratio: 2:3), and then use a high-energy ball mill to perform wet grinding and dry grinding to obtain nano-ceramic Composite powder with evenly distributed particles;

[0047] (2) In an inert gas atmosphere,...

Embodiment 2

[0061]According to the present invention, a nano-ceramic-metal composite powder for 3D printing uses the raw materials in the forming method of silicon carbide particle-reinforced aluminum-based composite materials based on the selective laser melting technology described in the Chinese patent (CN108480625A) to prepare spherical composite powders. powder, and adopt the SLM process parameters of the Chinese patent (CN108480625A) embodiment to prepare SiC / AlSi10Mg composite material. include:

[0062] Spherical AlSi10Mg powder with an average particle size of 30 μm is used as the matrix, and SiC powder with an average particle size of 10 μm is used as the reinforcing particle, wherein the mass fraction of SiC powder is 10%, and the purity of both is above 99.9%. The specific preparation steps are as follows:

[0063] (1) Firstly, mix the SiC ceramic particles with an average particle size of 10 μm and some AlSi10Mg powders (the ratio is 1:2), and then use a high-energy ball mill...

Embodiment 3

[0074] A nano-ceramic-metal composite powder for 3D printing and its application, with TC4 titanium alloy as the matrix and TiB with an average particle size of 5 μm 2 The ceramic particles are the reinforcing phase, and the added mass percentage is 2.0%. The base material is TC4 titanium alloy spherical powder with a particle size of 53-106 μm.

[0075] Described a kind of nano ceramic metal composite powder and application for 3D printing, the steps are as follows:

[0076] (1) First, the TiB of the said ratio 2 The ceramic particles are mixed with some TC4 alloy powders (the ratio is 2:3), and then the high-energy ball mill is used for wet grinding and dry grinding to obtain a composite powder with uniform distribution of nano-ceramic particles;

[0077] (2) In an inert gas atmosphere, place the composite powder obtained in step (1) in a plasma spheroidization device for spheroidization and cooling to obtain a spherical composite powder with uniform distribution of nano-c...

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Abstract

The invention provides nano ceramic metal composite powder for 3D printing and application. A metal material is used as a matrix, and ceramic particles are used as a reinforcing phase. One or more ceramic particles of micron-sized TiC, TiB2, WC, SiC, CrC, Al2O3, Y2O3 and TiO2 are used as raw materials, the mass percent of the added ceramic particles is 0.5-10.0%, through a specific ball milling process, plasma spheroidization, airflow classification and screening, the metal composite powder with high sphericity, good fluidity, narrow particle size range and uniformly distributed nano-ceramicsis obtained, and the high requirement of a 3D printing technology for powder is met; and a nano-ceramic reinforced metal composite material is prepared through the 3D printing technology. According tothe prepared metal composite material, nano ceramic phases are uniformly distributed, and the metal composite material has excellent mechanical properties. Micron-sized ceramic particles are adopted,uniform dispersion is achieved through nanocrystallization, and the cost is low; and parts in any complex shape can be integrally formed and prepared, and the material utilization rate is increased.

Description

technical field [0001] The invention provides a nano-ceramic-metal composite powder for 3D printing and its application, belonging to the technical field of metal-based composite materials and additive manufacturing. Background technique [0002] Ceramic reinforced metal matrix composites have the advantages of high specific strength, specific modulus, high temperature resistance, small thermal expansion coefficient, wear resistance, corrosion resistance, and good dimensional stability. Nano-ceramics reinforced metal matrix composites can maintain good toughness while improving mechanical properties such as strength and hardness. [0003] Additive Manufacturing (AM) technology is a technology that accumulates and superimposes materials point by point and layer by layer through the principle of discrete accumulation to form a three-dimensional entity. At present, there are three main types of metal additive manufacturing technologies: selected laser melting (SLM) technology,...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/105B33Y70/10B33Y10/00
CPCB22F1/0003B33Y70/10B33Y10/00B22F1/14Y02P10/25
Inventor 刘祖铭魏冰农必重吕学谦任亚科曹镔艾永康
Owner CENT SOUTH UNIV
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