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A high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method

An aluminum-based composite material and carbon nanotechnology, which is applied in the field of high-strength and high-heat-resistant carbon nano-aluminum-based composite materials and its preparation, can solve problems such as insufficient heat resistance and low alloy strength, achieve high production efficiency, reduce agglomeration, and avoid The effect of reunion

Active Publication Date: 2021-06-25
BEIJING GUOWANG FUDA SCI & TECH DEV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low strength and insufficient heat resistance of 1 series alloys used for connecting fittings, and provide a high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method, which can greatly reduce the strength while increasing the strength through traditional alloying technology. The application bottleneck problem of conductivity, the preparation method of the present invention has simple process, low cost, strong designability, and is suitable for water-cooled semi-continuous casting or continuous casting and rolling process to produce continuous large-scale production

Method used

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  • A high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method
  • A high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method
  • A high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method

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Embodiment 1

[0031] Alloy composition: based on 100% alloy mass, reduced graphene oxide 0.09%, Zr 0.30%, Fe 0.008%, Si 0.038%, Ti 0.010%, and the balance is Al.

[0032]The preparation process and proportion of reduced graphene oxide@alumina are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of ethanol: water is 0.5:14, and the content of KH-550 in the solution is 1.2vol.% volume fraction , statically dissolved for 2 hours; add no more than 5 layers of graphene oxide with an average sheet diameter of 10 microns in the solution, so that the concentration of graphene oxide is 3.0g / L, then add alumina powder and ultrasonically treat for 60min, the nano-alumina powder The diameter is 30nm. After the mixed solution obtained is vacuum freeze-dried, graphene oxide reduction sintering is carried out. The sintering temperature is 1000°C, and the time is 6h. The reduced graphene oxide@alumina composite powder is obtained, wherein the quality of alumina is reduction oxidat...

Embodiment 2

[0035] Alloy composition: based on 100% alloy mass, reduced graphene oxide 0.01%, Zr 0.1%, Ti 0.010%, Fe 0.071%, Si 0.035%, each of the remaining elements ≤ 0.01%, and the balance is Al.

[0036] The preparation process and proportion of pre-synthesized reduced graphene oxide@alumina are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of ethanol: water is 1:9, and the content of KH-550 in the solution is 1.5vol.%. Static dissolving for 6 hours; add no more than 3 layers of graphene oxide with an average sheet diameter of 15 microns to the solution to make the concentration of graphene oxide 0.5g / L, then add alumina powder and ultrasonically treat for 100min, the particle size of nano-alumina powder 5nm, the obtained mixed solution was subjected to vacuum freeze-drying, then reduced sintering of graphene oxide, the sintering temperature was 1500°C, and the time was 2h, and the reduced graphene oxide@alumina composite powder was obtained, wherein the m...

Embodiment 3

[0039] Alloy composition: based on 100% alloy mass, reduced graphene oxide 0.05%, Zr 0.3%, Ti 0.010%, Fe 0.069%, Si 0.034%, each of the remaining elements ≤ 0.01%, and the balance is Al.

[0040] The preparation process and proportion of pre-synthesized reduced graphene oxide@alumina are as follows: prepare KH-550 silane coupling agent solution, the volume ratio of ethanol: water is 0.5:9, and the content of KH-550 in the solution is 1.0vol.%. Volume fraction, statically dissolved for 4 hours; add no more than 3 layers of graphene oxide with an average sheet diameter of 20 microns in the solution to make the graphene oxide concentration 2g / L, then add alumina powder and ultrasonically treat for 80min, nano-alumina powder The particle size is 100nm. After vacuum freeze-drying, the obtained mixed solution is subjected to reduction and sintering of graphene oxide at a sintering temperature of 1250°C for 4 hours to obtain a reduced graphene oxide@alumina composite powder, in which ...

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Abstract

The invention provides a high-strength and high-heat-resistant carbon nano-aluminum matrix composite material and its preparation method. The basic system design of aluminum-zirconium alloy is adopted, and nano-alumina is grown on the surface of graphene as a reinforcing phase. The powder is blown into the aluminum melt by inert gas. A cast structure with uniform distribution of graphene is obtained. Graphene has a unique two-dimensional wrinkled surface, and the surface grows alumina nano-particles to form graphene@alumina, which increases the wettability of graphene and aluminum melts, and serves as particles for non-uniform nucleation to refine the grains. Good chemical stability, and Al 3 The Zr phase jointly improves the thermal stability of the aluminum matrix composites. The invention solves the problem of insufficient strength and heat resistance in the application process of 1-series alloy splicing fittings, and the density of the aluminum-based composite material produced by the casting method reaches 100%, the strength is increased by more than 30%, and the heat resistance is increased by 30-50% ℃ or more.

Description

technical field [0001] The invention relates to a nano-phase reinforced aluminum-based composite material, in particular to a high-strength and high-heat-resistant carbon nano-aluminum-based composite material and a preparation method thereof. Background technique [0002] At present, the drainage parts of tension-resistant splicing fittings are usually made of pure electrical aluminum profiles, and it is inevitable that the crimping area will relax prematurely during the operation of large-scale lines, which will cause temperature rise. And because of its poor heat resistance stability, with the increase of temperature rise, the conductivity and mechanical properties of the drainage parts will decrease obviously, and the creep will relax. Such a vicious circle, until the abnormal temperature rise, finally fails and falls off, leading to accidents. For high-voltage lines, especially ultra-high voltage and ultra-high voltage lines, large-scale power outages will be caused, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06C22C1/10C22F1/04
CPCC22C21/00C22C1/1036C22F1/04C22C1/1047
Inventor 冷金凤任玉锁邢兰俊徐德录李雅泊白建涛张磊李凤辉王康
Owner BEIJING GUOWANG FUDA SCI & TECH DEV
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