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A preparation method of carbon fiber reinforced aluminum composite material with high interlaminar strength

An aluminum composite material and interlayer strength technology, applied in the field of fiber reinforcement, can solve the problems of SiC whiskers not being uniformly dispersed, SiC easy to agglomerate, and weaken interlayer toughening effect, etc., to achieve interlayer shear strength improvement and simple conditions , Improve the effect of interface binding ability

Active Publication Date: 2020-08-25
BEIJING INST OF ELECTRONICS SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors of the present application have found that in the process of coating SiC whiskers, SiC whiskers can not be uniformly dispersed on the carbon fiber surface because SiC has a large aspect ratio and are easily agglomerated. No force, greatly weakening the interlayer toughening effect

Method used

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  • A preparation method of carbon fiber reinforced aluminum composite material with high interlaminar strength
  • A preparation method of carbon fiber reinforced aluminum composite material with high interlaminar strength

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for preparing a carbon fiber reinforced aluminum composite material with high interlaminar strength, comprising the steps of:

[0040] 1) Weighing: Weigh 50% carbon fiber reinforcement (unidirectional fiber), 3% Si powder and the balance 6061 aluminum alloy by mass fraction;

[0041] 2) Preparation of nano-Si powder: put the Si powder weighed in step 1) into a vacuum ball milling tank with a ball-to-material mass ratio of 35:1, vacuumize the vacuum ball milling tank, and then fill the vacuum ball milling tank with 0.01×10 5 The purity of Pa is more than 99.99% of argon gas, ball milled at a ball milling speed of 520r / min for 24h, and Si powder with a particle size of 2nm is obtained;

[0042] 3) pickling: immerse the 2nm Si powder obtained in step 2) in 2% hydrochloric acid solution for 25 hours to obtain the pickled powder;

[0043] 4) Washing: washing the nano-Si powder obtained by pickling in step 3) with distilled water, and drying it in a drying oven at ...

Embodiment 2

[0049] A method for preparing in-situ self-generated SiC whiskers to improve the interlaminar strength of carbon fiber reinforced aluminum composite materials, comprising the steps of:

[0050] 1) Weighing: Weigh 50% carbon fiber reinforcement (unidirectional fiber), 6% Si powder and the balance 6061 aluminum alloy by mass fraction;

[0051] 2) Preparation of nano-Si powder: put the Si powder weighed in step 1) into a vacuum ball milling tank with a ball-to-material mass ratio of 15:1, vacuumize the vacuum ball milling tank, and then fill the vacuum ball milling tank with 0.02×10 5 The purity of Pa is more than 99.99% of argon gas, ball milled for 12 hours at a ball milling speed of 310r / min to obtain Si powder with a particle size of 20nm;

[0052] 3) pickling: immerse the 20nm Si powder obtained in step 2) in a 5% hydrochloric acid solution for 16 hours to obtain the pickled powder;

[0053] 4) Washing: washing the nano-Si powder obtained by pickling in step 3) with distil...

Embodiment 3

[0058] A method for preparing in-situ self-generated SiC whiskers to improve the interlaminar strength of carbon fiber reinforced aluminum composite materials, comprising the steps of:

[0059] 1) Weighing: Weigh 80% of the carbon fiber reinforcement (unidirectional fiber), 6% of Si powder and the remainder of the matrix 6061 aluminum alloy by mass fraction;

[0060] 2) Preparation of nano-Si powder: put the Si powder weighed in step 1) into a vacuum ball milling tank with a ball-to-material mass ratio of 35:1, vacuumize the vacuum ball milling tank, and then fill the vacuum ball milling tank with 0.01×10 5 The purity of Pa is more than 99.99% of argon gas, ball milled at a ball milling speed of 520r / min for 24h, and Si powder with a particle size of 5nm is obtained;

[0061] 3) pickling: immerse the 5nm Si powder obtained in step 2) in a 5% hydrochloric acid solution for 30 hours to obtain the pickled powder;

[0062] 4) Washing: washing the nano-Si powder obtained by pickl...

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Abstract

The invention discloses a manufacturing method of a carbon fiber reinforced aluminum composite material with high interlayer strength. The manufacturing method comprises the steps: dispersing nano Sipowder into an organic solvent to prepare a nano Si suspension; coating the surface of a carbon fiber reinforced body with the nano Si suspension, and drying to obtain a nano Si powder coated carbon fiber reinforced body; fixing the nano Si powder coated carbon fiber reinforced body into a plate-shaped fiber bundle to obtain a fiber preform body; and preheating the fiber preform body in a mold ina protective gas atmosphere, adding an aluminum metal smelting liquid, carrying out reaction under the condition with the pressure of 40-70 MPa and the temperature of 750-1,000 DEG C, and then coolingto the room temperature to obtain the carbon fiber reinforced aluminum composite material with in-situ self-generated SiC whiskers and with high interlayer strength. According to the manufacturing method, in the process of forming the carbon fiber reinforced aluminum composite material, the SiC whiskers are self-generated in situ, so that the interlayer strength of the carbon fiber reinforced aluminum composite material is greatly improved.

Description

technical field [0001] The invention relates to the technical field of fiber reinforcement. More specifically, it relates to a method for preparing a carbon fiber reinforced aluminum composite material with high interlaminar strength. Background technique [0002] Carbon fiber reinforced aluminum (C f / Al) composite material has the properties of high specific strength and high specific modulus, so C f / Al can be used as an advanced structural material and has broad application prospects in aviation, aerospace, transportation, energy and other fields. for C f / Al composites, although they exhibit excellent performance in the plane dominated by carbon fibers, are prone to delamination damage due to weaker matrix properties and interfacial properties, making C f The strength and stiffness of the Al / Al composite material are greatly reduced, and even cause the composite material to fail during service. At present, the main methods for interlayer toughening of composite mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/04C22C47/06C22C47/10C22C47/12C22C49/06C22C49/14C22C101/10C22C121/02
CPCC22C47/04C22C47/06C22C47/10C22C47/12C22C49/06C22C49/14
Inventor 辛玲杨宁陈纲李君龙
Owner BEIJING INST OF ELECTRONICS SYST ENG