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Method for improving mechanical property of carbon fiber-reinforced aluminum matrix composite

A technology for strengthening aluminum-based and composite materials, applied in the field of improving the mechanical properties of carbon fiber reinforced aluminum-based composite materials, achieving the effects of improved mechanical properties, simple preparation process, and low manufacturing cost

Active Publication Date: 2021-06-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the interface between aluminum alloy and carbon fiber is easy to generate interface product Al when the existing carbon fiber reinforced aluminum matrix composite material is prepared, the present invention 4 C 3 problem, and propose a method to improve the mechanical properties of carbon fiber reinforced aluminum matrix composites

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  • Method for improving mechanical property of carbon fiber-reinforced aluminum matrix composite

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specific Embodiment approach 1

[0015] Embodiment 1: The method for improving the mechanical properties of carbon fiber reinforced aluminum matrix composites in this embodiment is carried out according to the following steps:

[0016] 1. Weighing materials: taking aluminum-cerium master alloy and aluminum alloy as raw materials, the mass fraction of cerium element in the raw materials is 0.05-0.9%;

[0017] 2. Mixed melting: heating and melting the aluminum alloy weighed in step 1 at high temperature, then adding an aluminum-cerium intermediate alloy and stirring to obtain an aluminum alloy melt containing cerium;

[0018] 3. Forming: put the carbon fiber reinforced body into the mold and preheat it, pour the aluminum alloy melt containing cerium obtained in step 2 into the mold, and perform pressure infiltration to obtain a carbon fiber reinforced aluminum matrix composite material; pressure infiltration process In the process, the aluminum alloy melt containing cerium obtained in step 2 is poured into the ...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment is different from Embodiment 1 in that: the mass fraction of cerium element in the raw material in step 1 is 0.05-0.9%.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the mass fraction of cerium in the raw material in step 1 is 0.1-0.9%.

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Abstract

The invention discloses a method for improving the mechanical property of a carbon fiber-reinforced aluminum matrix composite. The invention aims to solve the problem that an interface product Al4C3 is easily generated on an interface of an aluminum alloy and carbon fibers during preparation of an existing carbon fiber-reinforced aluminum matrix composite. The method comprises the following steps of: weighing an aluminum-cerium intermediate alloy and the aluminum alloy as raw materials, heating and melting the aluminum alloy at high temperature, adding the aluminum-cerium intermediate alloy, and stirring to obtain a cerium-containing aluminum alloy melt; and carrying out pressure infiltration and heat treatment. The thermodynamic principle is utilized, elements easy to segregate are added and segregated and separated out on the grain boundary, so that the interface contact state of the carbon fibers and an aluminum matrix is improved, the surface energy of the grain boundary can be reduced, and interface reaction is reduced. Therefore, the interface reaction of the carbon fibers and the aluminum matrix is inhibited, damage to the carbon fibers is reduced, and the mechanical property of the composite is improved. The method is suitable for preparing the carbon fiber-reinforced aluminum matrix composite.

Description

technical field [0001] The invention relates to a method for improving the mechanical properties of carbon fiber reinforced aluminum matrix composite materials. Background technique [0002] Carbon fiber reinforced aluminum matrix composites are one of the materials with the highest specific strength and specific stiffness, and have broad application prospects in the aerospace field. Carbon fiber reinforced aluminum matrix composites are used to manufacture rocket engine casings, missile instrument compartments, satellite antenna brackets, space station upper bracket mounting plates, and optical mirrors or mirror brackets in high-precision optical measurement systems. With the continuous development of aerospace technology, the demand for lightweight carbon fiber aluminum matrix composites is becoming more and more urgent. At the same time, it is hoped that the mechanical properties of carbon fiber reinforced aluminum matrix composites can be as high as possible. [0003] S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/08C22C49/06C22C49/14B22D23/04C22F1/04C22C101/10
CPCC22C47/08C22C49/06C22C49/14B22D23/04C22F1/04
Inventor 康鹏超赵旗旗王平平陈国钦芶华松姜龙涛武高辉辛玲杨宁王大奎
Owner HARBIN INST OF TECH
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