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Mechanical process of preparing composite nanometer ceramic and micron metal powder

A nano-ceramic powder and nano-ceramic technology, applied in the field of preparation of new materials, can solve the problems of difficult preparation and large limitations, and achieve the effect of simple and clear meaning, easy acquisition and reduced error

Inactive Publication Date: 2007-12-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the preparation of existing micro-nano composite powders has great limitations, and the mass ratio of the two is not fully considered, which makes the preparation difficult, and to invent a nano-ceramic powder that can be used And micron metal powder as raw material, through the mechanical composite method, the micro-nano composite powder can be prepared simply and efficiently, so as to effectively improve the use effect and added value of nano-ceramic powder and micron metal powder that have been marketed. Mechanical preparation method of micron metal composite powder

Method used

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  • Mechanical process of preparing composite nanometer ceramic and micron metal powder
  • Mechanical process of preparing composite nanometer ceramic and micron metal powder
  • Mechanical process of preparing composite nanometer ceramic and micron metal powder

Examples

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example 1

[0046] Example 1: Select commercially available pure aluminum powder with an average particle size of 6 μm and SiC powder with an average particle size of 25 nm, and the density of the micron powder material is 2.7 g / cm 3 , the density of the nanopowder material is 3.2g / cm 3 . In this example, the particle diameters of the nanometer powder and the micrometer powder differ by 2 orders of magnitude, so formula 2 is used to calculate their mass ratio to be 4:100. Put the nano-SiC powder into absolute ethanol and disperse it with an emulsifying shearing machine, and let it stand for 60 minutes to make a uniform and stable nano-suspension, then weigh the nano-SiC suspension and micron pure aluminum according to the calculated ratio. The powder is mixed, and then the powder is mechanically compounded by wet ball milling. The ball milling speed is 150r / min, the ball milling time is 60 minutes, and the ball-to-material ratio is 3:1. Nano-ceramic / micro-metal composite powder with unif...

example 2

[0047] Example 2: select commercially available NiCrAlY powder with an average particle size of 75 μm and Al with an average particle size of 20 nm 2 o 3 Powder, the density of micron powder material is 8.5g / cm 3 , the density of the nanopowder material is 3.97g / cm 3 . Since the particle diameters of the nano-powder and the micro-powder in this example differ by 3 orders of magnitude, formula 1 is used to calculate the mass ratio, and the mass ratio of the nano-ceramic powder and the micro-metal powder is 1.2:100. Nano Al 2 o 3 Put the powder into anhydrous ethanol and disperse it by ultrasonic wave for 30 minutes, and let it stand for 60 minutes to make a uniform and stable nano-suspension, and then weigh the nano-Al 2 o 3 The suspension is mixed with micron NiCrAlY powder, and then the powder is mechanically compounded by wet ball milling. The ball milling speed is 260r / min, the ball milling time is 30 minutes, and the ball-to-material ratio is 3:1. Nano-ceramics with ...

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Abstract

The present invention discloses mechanical process of preparing composite nanometer ceramic / micron metal powder. The composite nanometer ceramic / micron metal powder is prepared with marketable micron and nanometer powder as material, and through establishing the theoretical model of the weight ratio between the micron powder and the nanometer powder, preparing stable suspension of nanometer ceramic powder, mixing the nanometer suspension and the micron powder, and mechanical compounding. The process has simplicity, short treating time, easy control, continuous production and other features, and is suitable for engineering application.

Description

technical field [0001] The invention relates to a preparation method of a novel material, especially a preparation method of a micro-nano composite material, specifically a mechanical preparation method of a nano-ceramic / micro-metal composite powder. Background technique [0002] With the development of nanotechnology, the focus of nanomaterials research has gradually shifted from the preparation of single nanopowders to the application and development of nanoblocks and nanocoatings. Nanoceramic particle-reinforced metal matrix composites are one of the important development trends. As we all know, when the size reaches the nanometer level, the surface energy of a single nanoparticle is very high, the surface activity is very large, it is very unstable, and it is very easy to adsorb other substances or particles, and they attract each other and agglomerate, making the actual size of the nanopowder The use effect is poor, and many of its excellent characteristics are lost. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04
Inventor 王宏宇左敦稳李多生骆心怡王明娣朱永伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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