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A kind of high strength cf/al composite material and its preparation method

A composite material, high-strength technology, applied in the field of lightweight structural materials, can solve the problems of weak interlayer bonding of Cf/Al composite materials, and achieve the effect of improving bending strength, strength and plasticity

Active Publication Date: 2021-01-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength Cf / Al composite material and its preparation method in order to solve the problem of weak interlayer bonding of the existing Cf / Al composite material

Method used

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  • A kind of high strength cf/al composite material and its preparation method
  • A kind of high strength cf/al composite material and its preparation method

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specific Embodiment approach 1

[0016] Embodiment 1: The high-strength Cf / Al composite material in this embodiment is made of 55% to 65% carbon fiber and the balance Al-Mg-Sc-Zr alloy according to the volume percentage; wherein the carbon fiber is PAN-based carbon fiber, One or a mixture of pitch-based carbon fibers; Al-Mg-Sc-Zr alloy is configured from pure aluminum, pure magnesium, Al-Sc master alloy and Al-Zr master alloy.

[0017] In this embodiment, the Al-Mg-Sc-Zr alloy is composed of 4%-7% Mg, 0.15%-0.40% Sc, 0.10%-0.35% Zr and the balance Al.

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the high-strength Cf / Al composite material is made of 58% carbon fiber and the balance Al-Mg-Sc-Zr alloy by volume. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the high-strength Cf / Al composite material is made of 60% carbon fiber and the balance Al-Mg-Sc-Zr alloy by volume percentage. Others are the same as in the first embodiment.

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Abstract

A high-strength Cf / Al composite material and a preparation method thereof belong to the field of lightweight structural materials. It needs to solve the problem of weak bonding between layers of existing Cf / Al composite materials. Material: Made of carbon fiber and Al‑Mg‑Sc‑Zr alloy. Method: 1. Prepare carbon fiber prefabricated body; 2. Preheat the prefabricated body; 3. Melt aluminum alloy; 4. Pressurize impregnation; In the present invention, the Mg element suppresses the harmful interfacial reaction product Al 4 C 3 The formation of the interfacial phase Al 58 Mg 42 , strengthen the interfacial bonding; Sc, Zr elements, refine the grains of the matrix alloy, and form the second phase Al dispersed in the aluminum matrix 3 (Sc, Zr), improve the strength and plasticity of the base aluminum alloy, and strengthen the interface at the same time. Under the coupling action of Mg, Sc and Zr, the interlaminar shear strength and bending strength of the material are significantly improved. The material prepared by the invention is used for space vehicles.

Description

technical field [0001] The invention belongs to the field of lightweight structural materials, and in particular relates to a high-strength Cf / Al composite material and a preparation method thereof. Background technique [0002] Cf / Al composite materials are important candidates for space vehicles due to their advantages of high specific strength, specific stiffness, and low density. However, with the excellent in-plane mechanical properties, the interlaminar strength of Cf / Al composites is low. The actual components are often complex in shape, and in addition to the axial tensile and compressive stresses, they are often accompanied by complex bending and shearing stresses during the bearing process. Therefore, the main failure mode of components during forming and service is interlaminar failure. At present, the main methods of interlayer toughening of composite materials include matrix alloying, introduction of reinforced structures (see patent number: ZL200810064731.7, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/12C22C47/06C22C49/06C22C49/14C22C101/10
CPCC22C47/06C22C47/12C22C49/06C22C49/14
Inventor 王平平赵旗旗陈国钦康鹏超芶华松杨文澍武高辉
Owner HARBIN INST OF TECH