Aluminum-base carbon nanotube reinforced composite material and manufacturing method

A technology for reinforcing composite materials and carbon nanotubes is applied in the field of production of blanks for helicopter tiltmeter moving ring forgings, which can solve the problems of inability to meet forging requirements, failure to meet use requirements, and inability to use forging blanks, so as to avoid oxide impurities. The introduction, elimination of pores, and the effect of low defects

Inactive Publication Date: 2018-10-30
JIANGXI CHANGHE AVIATION IND
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Problems solved by technology

Traditional aluminum matrix composite preparation methods such as hot isostatic pressing sintering and other technologies have to add dispersants when mixing materials, and the obtained materials have many defects such as microscopic pores and poor interface bonding, which cannot meet the subsequent forging requirements; casting methods The prepared aluminum-based composite also has many defects such as casting pores and segregation, and cannot be used for forging blanks, which cannot meet the requirements of use

Method used

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Embodiment Construction

[0014] The composition and mass percentage of the aluminum-based carbon nanotube reinforced composite material of the present invention are:

[0015] Carbon nanotubes: 0.1%-5%, Cu: 3.2%-4.4%, Mg: 1.0%-1.9%, Si: 0.25%-0.3%, Fe: 0.2%-0.4%, Zn: 0.1%-0.2%, O: 0%-0.3%, Al: balance.

[0016] The method for preparing the above-mentioned aluminum-based carbon nanotube reinforced composite material comprises the following steps:

[0017] (1) Select an appropriate amount of carbon nanotube and aluminum alloy powder according to the above-mentioned composition and mass percentage;

[0018] (2) Mix carbon nanotubes and aluminum alloy powder, add organic solvents such as acetone or absolute ethanol that do not react with the raw materials, and use ultrasonic dispersion (can be performed by an ultrasonic cleaning machine) to stir and mix for 60-90 minutes;

[0019] (3) Vacuum drying the mixed liquid for 12-15 hours at a drying temperature of 50-70°C;

[0020] (4) Spark plasma sintering i...

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Abstract

The invention relates to an aluminum-base carbon nanotube reinforced composite material and a manufacturing method. The aluminum-base carbon nanotube reinforced composite material and the manufacturing method are applied to production of moving ring forged piece blanks of automatic inclinometers of helicopters. Carbon nanotubes generally have a problem that the strength upper limit is limited. Aconventional aluminum-base composite material manufacturing method has the defects that lots of microcosmic pores exist, interface bonding is poor, and the follow-up forging requirements cannot be met. The aluminum-base carbon nanotube reinforced composite material comprises, by mass percentage, 0.1%-5% of carbon nanotubes, 3.2%-4.4% of Cu, 1.0%-1.9% of Mg, 0.25%-0.3% of Si, 0.2%-0.4% of Fe, 0.1%-0.2% of Zn, 0%-0.3% of O and the balance Al. The uniform dispersion is good, and the residue of dispersing agents and the introduction of oxide impurities are avoided. The pores can be completely eliminated, and the defect quantity is quite low. The requirement for the higher strength is met, and the manufacturing efficiency is high.

Description

technical field [0001] The invention relates to an aluminum-based carbon nanotube-reinforced composite material and a preparation method thereof, which are used in the production of forging blanks of moving rings of helicopter autotilt gauges. Background technique [0002] The autoclinometer is one of the core components of the helicopter. The moving ring part puts forward high requirements on the strength, weight and wear resistance of the material. The traditional aluminum alloy has been difficult to meet the requirements, and the cost of the titanium alloy material is too high and the weight is too large. , not wear-resistant, aluminum matrix composites become the first choice. Carbon nanotube-reinforced aluminum matrix composites have advantages in strength, weight and cost, and are very suitable for manufacturing dynamic ring forging blanks, but there is generally a problem of limited upper limit of strength. Traditional aluminum matrix composite preparation methods su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/14C22C21/16C22C21/18C22C26/00C22C1/05C22C1/10C22C21/00
Inventor 郭楠巢昺轩徐平安熊曦耀李智勇
Owner JIANGXI CHANGHE AVIATION IND
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