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Ceramic metal powder as well as preparation method and application thereof

A ceramic metal and metal powder technology, applied in the field of 3D printing, can solve the problems of low oxygen content, high sphericity, and high cost, and achieve the effect of stress concentration without segregation, high sphericity, and reducing cracks

Active Publication Date: 2020-11-03
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder prepared by this technology has good fluidity, high sphericity and low oxygen content, but the cost is high and it is not suitable for new product development

Method used

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  • Ceramic metal powder as well as preparation method and application thereof
  • Ceramic metal powder as well as preparation method and application thereof
  • Ceramic metal powder as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0056] The present application proposes a preparation method of ceramic metal powder, which includes the following steps: mixing nano-ceramic powder suspension and metal powder suspension so that the nano-ceramic powder evenly adheres to the surface of the metal powder.

[0057] By setting the nano-ceramic powder and metal powder in the form of a suspension and then mixing them, the nano-phase can be effectively adhered to the surface of the metal powder evenly, without changing the shape, particle size and fluidity of the metal powder. In the process of selective laser fusion forming, the nano phase is uniformly distributed, cracks are reduced, stress concentration is not segregated, etc.

[0058] In an optional embodiment, the preparation of the nano-ceramic powder suspension may include, for example: mixing the nano-ceramic powder with a first organic solvent.

[0059] The raw material of the above-mentioned nano-ceramic powder may include at least one of oxide ceramics and n...

Embodiment 1

[0089] Mix nano-TiB with a volume ratio of 1:100 2 (with a particle size of 3 nm) was placed in an aqueous ethanol solution, and ultrasonically dispersed for 15 minutes to obtain a nano ceramic powder suspension.

[0090] With a volume ratio of 20:100, nickel 625 powder (fluidity 23.94s / 50g, morphology and particle size distribution are as follows figure 1 and figure 2 shown) was dispersed in another aqueous ethanol solution, and 1 wt% sodium dodecylsulfonate was added, and stirred to obtain a metal powder suspension.

[0091] Pour the above-mentioned metal powder suspension into the nano-ceramic powder suspension, then add 0.5wt% polyvinyl alcohol (PVA) to the above-mentioned mixed suspension, centrifuge at a high speed for 10min at a speed of 100rpm, and then undergo rotary evaporation , drying, and sieving to obtain ceramic metal powder suitable for SLM technology, that is, TiB 2 / Ni625 composite powder.

[0092] The TiB 2 The fluidity of the / Ni625 composite powder i...

Embodiment 2

[0100] Nano-TiC (particle size: 30nm) was placed in ethanol aqueous solution at a volume ratio of 5:100, and ultrasonically dispersed for 20 minutes to obtain nano-ceramic powder suspension.

[0101] Disperse nickel 718 powder (with a particle size of 5-50 μm) in another aqueous ethanol solution at a volume ratio of 30:100, add 1 wt% polyethylene glycol (PEG) 20000, and stir to obtain a metal powder suspension.

[0102]Pour the above-mentioned metal powder suspension into the nano-ceramic powder suspension, then add 1wt% polyvinyl alcohol (PVA) to the above-mentioned mixed suspension, and centrifuge at a high speed for 6 minutes at a speed of 300 rpm to obtain a suspension C. Then, through rotary evaporation, drying and sieving, ceramic metal powder suitable for SLM technology is obtained, that is, TiC / Ni718 composite powder, and its fluidity is 25-32s / 50g.

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Abstract

The invention discloses ceramic metal powder and a preparation method and application thereof, and belongs to the technical field of 3D printing. The preparation method comprises the following steps:mixing a nano ceramic powder suspension and a metal powder suspension to enable nano ceramic powder to be uniformly adhered to the surface of metal powder. The nano ceramic powder and the metal powderare arranged in a suspension form and then mixed, so that a nano phase can be effectively and uniformly adhered to the surface of the metal powder, morphology, granularity and flowability of the metal powder are not changed, meanwhile, uniform distribution of the nano phase in the selective laser melting forming process is achieved, and cracks, stress concentration, segregation-free and the likeare reduced. Moreover, the method can overcome the defects of long period and high cost of developing new materials suitable for the SLM technology at present. The ceramic metal powder prepared through the method is good in fluidity, high in sphericity degree and particularly suitable for the selective laser melting technology.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a ceramic metal powder and its preparation method and application. Background technique [0002] Ceramic / metal composite materials have the excellent ductility, electrical conductivity and thermal conductivity of metal materials, as well as the high hardness and wear resistance of ceramic materials. Their products are widely used in various fields such as aerospace, energy, automobile and electromechanical, and brought huge economic benefits. With the great development and progress of industrial technology, the requirements for the structure and performance of composite materials are becoming more and more stringent, and the traditional forming technology can no longer meet them. Selective laser melting (SLM) is currently the most widely used metal 3D printing technology. It has the characteristics of high dimensional accuracy, good surface quality, and excellent performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105B33Y70/10
CPCB33Y70/10B22F1/10Y02P10/25
Inventor 李艳辉张欣悦卢冰文王岳亮董东东马文有李福海陈兴驰
Owner GUANGDONG INST OF NEW MATERIALS
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