Micro-nano particle reinforced aluminum-based composite material and preparation method thereof

A technology of micro-nano particles and composite materials, applied in the field of aluminum-based composite materials and their preparation, can solve problems such as difficulty in uniform dispersion, and achieve the effects of improving interface wettability, reducing reaction temperature, and increasing flexural strength and Brinell hardness.

Inactive Publication Date: 2012-07-04
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above technical solutions is that they are reinforced by single-scale particles, and the particles are all micron-sized. According to research, the size of the reinforcement has an important impact on the performance of the composite material. With the increase of the size of the reinforcement, The strength of the material will gradually decrease, but if fine nanometer and submicron particles are used as the reinforcing phase, it will be difficult to disperse evenly in the matrix

Method used

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  • Micro-nano particle reinforced aluminum-based composite material and preparation method thereof
  • Micro-nano particle reinforced aluminum-based composite material and preparation method thereof
  • Micro-nano particle reinforced aluminum-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1 The micro-nano particle reinforced aluminum-based composite material was prepared through the following process:

[0035] Step 1. Preparation of silicon carbide / copper oxide composite powder:

[0036] a. Prepare 0.34mol / L copper sulfate solution A and 20mol / L sodium hydroxide solution B respectively;

[0037] b. Add 50um silicon carbide powder with a particle size of 1:1 to the copper ion in a ratio of 1:1 to the A solution and stir to obtain the C mixed suspension, the stirring time is 15 minutes;

[0038] c. Mix solution B and suspension C to obtain solution D, and stir for 30 minutes at a stirring speed of 100 rpm at a temperature of 20°C; d. Vacuum filter the product in solution D, bake at 150°C for 6 hours, and grind. The composite powder is obtained, the morphology and structure are as Figure 2a , 2b Shown

[0039] Step two, see figure 1 , The use of stirring casting combined with in-situ reaction method to prepare micro-nano particle reinforced aluminum-based ...

Embodiment 2

[0044] The difference between this embodiment and the embodiment 1 is that the reaction temperature when solution B is added to solution C is 30°C. See Figure 3a Under the same conditions, the coating effect at a temperature of 30°C is not as good as that at a temperature of 20°C.

Embodiment 3

[0046] The difference between this embodiment and the embodiment 1 is that the reaction temperature when solution B is added to solution C is 40°C. See Figure 3b It can be seen that the coating effect at 40°C is not as good as that at 20°C and 30°C.

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Abstract

The invention relates to a micro-nano particle reinforced aluminum-based composite material and a preparation method thereof. The aluminum-based composite material takes aluminum or an aluminum alloy as a substrate material; micron-scale silicon carbide particles and nano alumina particles are uniformly dispersed in the substrate material; and the nano alumina particles are generated by undergoing a thermit reaction on nano copper oxide particles and a substrate alloy on the surfaces of the silicon carbide particles, so that a micron silicon carbide / nano alumina reinforced aluminum-based composite material is formed. The preparation method of the aluminum-based composite material comprises the following steps of: undergoing a reaction on micron-scale silicon carbide powder and soluble copper salt in an alkaline solution; filtering, baking and grinding to obtain silicon carbide / copper oxide composite powder; and undergoing a thermit reaction on the composite powder and an aluminum melt, and casting and molding to obtain a target product. By adopting the method, composite reinforcement of the substrate is realized by particles of multiple scales and multiple types, the obtained aluminum-based composite material has the advantages of high intensity, high wear resistance and the like, the bending resistance and Brinell hardness of the aluminum-based composite material are increased by over 50 percent and 73 percent compared with those of the conventional aluminum alloy respectively, and the friction coefficient is lowered by over 25 percent.

Description

technical field [0001] The invention relates to an aluminum-based composite material and a preparation process thereof, in particular to an aluminum-based composite material with silicon carbide powder coated with copper oxide nanoparticles on the surface as a reinforcing phase and a preparation method thereof. Background technique [0002] Due to its high hardness, high modulus and dimensional stability, ceramic particles have been widely used as a reinforcing phase in metal matrix and resin matrix composite materials in material design, and a single ceramic powder or A single metal powder has achieved industrial production in recent years, and its particle size has also developed from micron to nanoscale. However, the wettability between ceramic particles and the added matrix material system is poor, which seriously restricts the ceramic powder. application of materials. Particle-reinforced aluminum matrix composites have the advantages of both aluminum alloy and reinforc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/02
Inventor 李凯姚辉石锦罡陈名海李清文张锐徐坤元
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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