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High-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material and preparation method thereof

A technology for strengthening aluminum-based and composite materials, which is applied in the preparation of the material, in the field of high-strength and high-ductility CNTs-SiCp reinforced aluminum-based composite materials, which can solve the problems of difficulty in balancing strength, ductility, and conductivity, and achieve weakening adverse reactions and strengthening Effect of interfacial bonding and wettability improvement

Inactive Publication Date: 2017-03-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An object of the present invention is to provide a high-strength and high-ductility CNTs-SiC p Reinforced aluminum matrix composites to solve the problem that the strength, ductility and conductivity of existing CNTs reinforced aluminum matrix composites are difficult to balance

Method used

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  • High-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material and preparation method thereof
  • High-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material and preparation method thereof
  • High-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material and preparation method thereof

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preparation example Construction

[0033] The preparation method of this material is:

[0034] Step 1, prepare mixed powder

[0035] Weigh carbon nanotubes, silicon carbide particles and aluminum powder according to the above volume percentage, add the above powder into the ball mill tank, use Φ10mm and Φ5mm mixed zirconia balls for the grinding balls, and the ball-to-material ratio of Φ10mm balls is 1~10:1 , The ball-to-material ratio of Φ5mm grinding balls is 1-5:1. Then add ethanol accounting for 1-5% of the mass of the mixed powder as a process control agent, and adopt a low-speed planetary ball milling method to disperse under the protection of an inert gas. powder.

[0036] Step 2, Sintering

[0037]The ball-milled mixed powder is loaded into a graphite mold, and then the mixed powder is first pressed into a block at room temperature and a pressure of 5-20 MPa, and then the block is sintered at 450-630 °C and 10-30 MPa with discharge plasma for 0.5 ~3h, and finally put the sintered composite material ...

Embodiment 1

[0040] Preparation of a CNTs-SiC p Enhance AMCs.

[0041] Weigh 0.1110g of single-walled carbon nanotubes with a diameter of 10nm-50nm and a length of 100nm-1cm, 0.1778g of silicon carbide with a particle size in the range of 20nm to 150nm, and 59.7112g of aluminum raw powder with a particle size of 10 to 100μm. The volume percentages are 0.25%, 0.25%, and 99.5%, respectively. Put all the powders into a tungsten carbide ball mill jar, add 240g of 10mm in diameter and 60g of zirconia balls of 5mm in diameter, then add 1ml of absolute ethanol, exhaust with high-purity argon for 5min, and use planetary ball milling under argon atmosphere for 4h at 200rpm, every 10 minutes of ball milling with an interval of 10 minutes. The composite powder was packed in a graphite mold in an argon glove box, pressed into a block with a pressure of 20 MPa, and then sintered in a spark plasma sintering furnace at 630 °C and 30 MPa for 1 hour. In a tube furnace under the protection of inert gas, ...

Embodiment 2

[0043] Preparation of a CNTs-SiC p Enhance AMCs.

[0044] Weigh 0.2223g of multi-walled carbon nanotubes with a diameter of 20nm-200nm and a length of 100nm-1cm, 0.3557g of silicon carbide with a particle size in the range of 20nm-150nm, and 59.4220g of aluminum raw powder with a particle size of 10-100μm. The volume percentages are 0.5%, 0.5%, and 99%, respectively. Put all the powders into a tungsten carbide ball mill jar, add 240g of 10mm in diameter and 60g of zirconia balls of 5mm in diameter, then add 1ml of absolute ethanol, exhaust with high-purity argon for 5min, and use planetary ball milling under argon atmosphere for 4h at 200rpm, every 10 minutes of ball milling with an interval of 10 minutes. The composite powder was packed in a graphite mold in an argon glove box, pressed into a block with a pressure of 10 MPa, and then sintered in a spark plasma sintering furnace at 630°C and 30 MPa for 1 hour. In a tube furnace under the protection of inert gas, the sample ...

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Abstract

The invention discloses a high-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material which comprises the following components: less than or equal to 5vol.% of a carbon nano tube, less than or equal to 5 vol.% of silicon carbide particles and the balance aluminum powder. A preparation method for the high-strength high-ductility CNTs-SiCp enhanced aluminum-based composite material comprises the following steps of: adding raw material components and grinding balls into a ball-milling tank in proportion, adding a process control agent into the ball-milling tank, ball-milling and dispersing under the protection of inert gases, thereby obtaining uniformly dispersed mixed powder; filling a graphite mould with the mixed powder, pre-pressing the mixed powder, and sintering pre-pressed block bodies; and pre-heating a sintered and formed composite material in a tubular furnace under the protection of inert gases, and carrying out thermal extrusion, thereby obtaining the CNTs-SiCp enhanced aluminum-based composite material. The CNTs-SiCp enhanced aluminum-based composite material has very good mechanical property, and also keeps high ductility and high electrical conductivity.

Description

technical field [0001] The invention belongs to the technical field of preparation of aluminum-based composite materials, in particular to a high-strength and high-ductility CNTs-SiC p The reinforced aluminum matrix composite material also relates to a preparation method of the material. Background technique [0002] Aluminum matrix composites (Aluminum Matrix Composites, AMCs) refer to a new class of materials obtained by compounding aluminum or aluminum alloys by adding a reinforcing phase through a certain preparation process technology, which is a kind of light metal material. This type of new material has excellent properties that a single material does not have, such as high specific strength, low density, good dimensional stability, small thermal expansion coefficient, good fatigue resistance, ablation resistance, wear resistance, etc. In addition, aluminum matrix composite materials The preparation methods of aluminum matrix composites are flexible and diverse, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C49/06C22C49/14C22C101/10
CPCC22C26/00C22C47/14C22C49/06C22C49/14C22C2026/002
Inventor 李树丰张鑫
Owner XIAN UNIV OF TECH
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