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Graphene, aluminum and silicon carbide composite material and preparation method and application thereof

A graphene-aluminum-silicon carbide and composite material technology is applied to graphene-aluminum-silicon carbide composite materials and their preparation and application fields, and can solve the problems of control difficulty, safety, material property anisotropy, and insufficient mixing.

Active Publication Date: 2017-05-17
BEIJING BAOHANG ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of simple forming and no need for subsequent complicated machining, but there are problems such as uneven distribution of reinforcement phases and pore defects, which lead to anisotropy in material properties, large surface, and inability to control the volume of silicon carbide. Defects such as content of other reinforcing phases (such as graphene)
Moreover, the method prepares graphene / silicon carbide reinforced aluminum matrix composites by preparing SiC ceramic preforms by pressure infiltration, and needs to heat the aluminum liquid to 700-750 ° C, which has control difficulties and safety problems; and adopts The method of ball milling (about 10 to 20 hours) adds the graphene ethanol dispersion to the aluminum silicon carbide composite material, and there are defects such as insufficient mixing

Method used

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  • Graphene, aluminum and silicon carbide composite material and preparation method and application thereof
  • Graphene, aluminum and silicon carbide composite material and preparation method and application thereof
  • Graphene, aluminum and silicon carbide composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1 Preparation of graphene-aluminum-silicon carbide composites

[0066] The composition of the graphene aluminum silicon carbide composite material is:

[0067]

[0068] The preparation method of graphene aluminum silicon carbide composite material may further comprise the steps:

[0069] 1. Uniformly disperse 1000g graphene ultrasonically (frequency 50Hz, ultrasonic 40min) into 1000ml absolute ethanol to prepare graphene ethanol dispersion;

[0070] 2. Weigh 11.5kg of aluminum alloy powder and 3.5kg of silicon carbide, put them into the mixer in turn, and mix them at 500rpm for 30 minutes; after mixing at 850rpm for 1 hour, the aluminum-silicon carbide mixed powder is obtained and divided into five grades share;

[0071] 3. Measure 0ml, 15ml, 30ml, 45ml, and 60ml of graphene ethanol dispersion, respectively, at 900rpm, atomize and spray the graphene ethanol dispersion into five equal parts of aluminum silicon carbide mixed powder, and mix again at 900rpm ...

Embodiment 2

[0075] Example 2 Preparation of graphene-aluminum-silicon carbide composites

[0076] The composition of the graphene aluminum silicon carbide composite material is:

[0077]

[0078] The preparation method of graphene aluminum silicon carbide composite material may further comprise the steps:

[0079] 1. Uniformly disperse 1000g of graphene into 1000ml of absolute ethanol by ultrasonic (frequency 60Hz, ultrasonic 45min) to obtain graphene ethanol dispersion;

[0080] 2. Weigh 2.5kg of aluminum alloy powder and 0.5kg of silicon carbide, put them into the mixer in turn, mix at 600rpm for 30min; mix at 950rpm for another 1h, and prepare aluminum-silicon carbide mixed powder;

[0081] 3. Under the condition of 950rpm, atomize and spray 30ml of graphene ethanol dispersion into the aluminum silicon carbide mixed powder, and then mix at 950rpm for 2 hours to prepare the graphene aluminum silicon carbide mixed dispersion;

[0082] 4. After collecting the graphene-aluminum-silico...

Embodiment 3

[0085] Example 3 Preparation of graphene-aluminum-silicon carbide composites

[0086] The composition of the graphene aluminum silicon carbide composite material is:

[0087]

[0088] The preparation method of graphene aluminum silicon carbide composite material may further comprise the steps:

[0089] 1. Uniformly disperse 1000g of graphene into 1000ml of absolute ethanol by ultrasonic (ultrasonic frequency 70Hz, ultrasonic 30min) to prepare graphene ethanol dispersion;

[0090] 2. Weigh 2.3kg of aluminum alloy powder and 0.7kg of silicon carbide, put them into the mixer in turn, mix at 650rpm for 30min; after mixing at 1000rpm for 1h, the aluminum-silicon carbide mixed powder is obtained;

[0091] 3. Under the condition of 1000rpm, atomize and spray 30ml of graphene ethanol dispersion into the aluminum silicon carbide mixed powder, and then mix at 1000rpm for 2 hours to obtain the graphene aluminum silicon carbide mixed dispersion;

[0092] 4. After collecting the gra...

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PUM

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Abstract

The invention relates to a graphene, aluminum and silicon carbide composite material and a preparation method thereof. The composite material is prepared from of constituents of 10-40 vol% of silicon carbide, 0.5-2 wt% of graphene, and the balance aluminum alloy. The composite material is prepared through a powder metallurgic method and can be obtained through proportioning, powder mixing, packaging, vacuum degassing and hot isostatic forming. The composite material has the advantages of low density, low weight, high hardness, high tensile strength and the like, the strength, fatigue resistance and toughness of the material are remarkably improved through addition of a proper amount of graphene, and thus the composite material has broader application prospects in the field of structural pieces.

Description

technical field [0001] The invention relates to a graphene-aluminum-silicon carbide composite material, a preparation method and an application thereof. Background technique [0002] Aluminum is the second largest metal after steel. It has the advantages of lightness, good strength, good ductility, strong conductivity, and good corrosion resistance. It is widely used in construction, packaging, electronics, transportation and other industries, aviation, Industries such as defense and automotive are increasingly demanding aluminum. [0003] Aluminum silicon carbide is a metal matrix composite material, which combines the different advantages of silicon carbide ceramics and metal aluminum, and has the advantages of low density, light weight, high hardness and high tensile strength. However, some structural parts with special requirements or structural parts used in special working environments have higher requirements on the performance of aluminum alloy and aluminum silicon ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05B22F3/15B22F1/00
CPCB22F1/0003B22F3/15B22F2998/10C22C1/05C22C21/00C22C32/0047
Inventor 李振民刘干孟庆宇
Owner BEIJING BAOHANG ADVANCED MATERIALS CO LTD
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