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A kind of preparation method of zinc oxide particle reinforced aluminum matrix composite material

A zinc oxide particle-reinforced aluminum-based technology, which is applied in metal rolling and other directions, can solve the problems affecting the mechanical and electrical properties of metal-based composite materials, the volume fraction of reinforcements, and the sample is prone to pores, etc., and achieves simple operation and low cost. The effect of low cost and simple equipment

Active Publication Date: 2018-09-07
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the casting method and powder metallurgy method, the strengthening particles usually tend to agglomerate, resulting in uneven distribution, and the sample is prone to defects such as pores and cracks, which greatly affects the mechanical and electrical properties of the prepared metal matrix composites.
In situ synthesis can solve the above problems, but when using in situ synthesis, the volume fraction of the enhancer is limited

Method used

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  • A kind of preparation method of zinc oxide particle reinforced aluminum matrix composite material
  • A kind of preparation method of zinc oxide particle reinforced aluminum matrix composite material
  • A kind of preparation method of zinc oxide particle reinforced aluminum matrix composite material

Examples

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Effect test

Embodiment 1

[0027] Example 1: 2.5vol.% nano-zinc oxide is sandwiched between pure aluminum that has been completely annealed, deoxidized, and degreased, and then continuously accumulated for 4, 8, and 12 passes at room temperature without lubrication rolling. In this embodiment, the aluminum content of the pure aluminum plate is 99.99%, and the size is: 100×20×0.25mm; the particle size of zinc oxide is 248nm. Adopt industrial rolling mill, rolling speed is 187mm / min. During each rolling pass, the reduction in the thickness direction of the sample is 50%. Perform surface treatment such as deoxidation and degreasing on the fully annealed pure aluminum sheet. After the weighed nano-ZnO particles are ultrasonically oscillated in acetone, they are evenly coated on the surface of the treated aluminum sheet. After the acetone volatilizes, the Multiple layers of aluminum sheets were stacked together and the two ends of the sample were fixed with glue, and rolled at room temperature. After one ...

Embodiment 2

[0033] Embodiment 2: The nano zinc oxide of 0.5vol.%, 2.5vol.% and 5.0vol.% is respectively clamped in the middle of pure aluminum through complete annealing and deoxidation film, degreasing treatment, then under the condition of no lubrication at room temperature It performs cumulative rolling 8 times continuously.

[0034] In this embodiment, the aluminum content of the pure aluminum plate is 99.99%, and the size is: 100×20×0.25mm; the particle size of zinc oxide is 248nm. Adopt industrial rolling mill, rolling speed is 187mm / min. During each rolling pass, the reduction in the thickness direction of the sample is 50%. After 8 passes of rolling, spark plasma sintering was carried out on the rolled sample. The sintering temperature used was 500°C, the sintering holding time was 5 minutes, and the sintering pressure was 80MPa. During the sintering process, the sample was protected by argon to prevent its oxidation.

[0035] Figure 5 It is a scanning electron microscope (SE...

Embodiment 3

[0039] Example 3: 5.0vol.% nano zinc oxide is sandwiched between pure aluminum that has been completely annealed, deoxidized and degreased, and then it is continuously rolled for 8 passes at room temperature without lubrication.

[0040] In this embodiment, the aluminum content of the pure aluminum plate is 99.99%, and the size is: 100×20×0.25mm; the particle size of zinc oxide is 248nm. Adopt industrial rolling mill, rolling speed is 187mm / min. During each rolling pass, the reduction in the thickness direction of the sample is 50%. After rolling for 12 passes, discharge plasma sintering was carried out on the rolled samples. The sintering temperature used was 500°C, the sintering holding time was 5 minutes, and the sintering pressure was 80MPa. During the sintering process, the samples were protected by argon to prevent their oxidation.

[0041] Figure 7 It is a scanning electron microscope (SEM) photo of the longitudinal section of the ZnO-reinforced aluminum matrix comp...

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Abstract

The invention belongs to the field of composites and particularly relates to a preparation method of zinc oxide particle strengthened aluminum-based composite. Zinc oxide is ultrasonically dispersed and evenly applied between pure-aluminum plates that are subjected to full annealing, oxide film removal and degreasing, and the pure-aluminum plates are then subjected to multiple continuous accumulative rolling; a rolled sample is then subjected to discharge plasma sintering process; through strain strengthening and refined crystalline strengthening of the accumulative rolling process and particle strengthening of zinc oxide strengtheners, the composite finally produced has high microhardness about 2.1 times as high as that of an original pure-aluminum sample and also has high heat conductivity and low thermal expansion coefficient. The preparation method has low cost and good safety and reliability and is easy to perform, crystalline grains in the obtained aluminum-based nano composite structure are small, and the nano zinc oxide strengthening phase is evenly distributed with no evident clustering.

Description

technical field [0001] The invention relates to a preparation method of zinc oxide particle-reinforced aluminum-based composite materials, belonging to the field of aluminum-based composite materials. Background technique [0002] Due to its high specific strength, high specific modulus, good high temperature performance, fatigue resistance, corrosion resistance and good electrical conductivity and other comprehensive mechanical properties and performance, particle reinforced aluminum matrix composites have become the most promising development in the 21st century. One of the advanced materials. Among them, the dispersion-reinforced aluminum matrix composite material is the most common one, because of its outstanding isotropic characteristics, strong machinability, low price, no aging, high temperature creep phenomenon, and no release of small molecules under high vacuum conditions. Features, in aerospace, military, automotive, electronics and daily necessities and other fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B21B1/38
CPCB21B1/38B21B2001/386B22F3/105
Inventor 梅青松李聪玲管茂生李杨李菊英陈峰马烨
Owner WUHAN UNIV
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