Reinforcement method for continuous filament reinforced metallic matrix composite

A composite material and continuous fiber technology, applied in the field of reinforcement of composite materials, can solve the problems of easy delamination, low stiffness and strength performance, low impact toughness and damage tolerance level, so as to improve interlayer strength and prevent delamination. Effect of layer cracking and shear failure, strengthening strength

Active Publication Date: 2008-12-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low stiffness and strength performance, low in-plane shear and interlaminar shear strength, easy delamination, low impact toughness and damag

Method used

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  • Reinforcement method for continuous filament reinforced metallic matrix composite

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Describe this embodiment, the method of this embodiment is realized as follows: After the fiber preform 2 is prepared, add the metal wire 1 to the fiber preform 2, and the fiber preform 2 and the composite material matrix 3 are heated for metal liquid immersion After cooling, the reinforcement of continuous fiber reinforced metal matrix composites is completed. This design enables the high-strength metal wire 1 to form a strong interfacial bond with the composite material matrix 3, which improves the performance of the fiber-reinforced metal matrix composite material in the direction of weakness such as thickness or interlayer. Due to the high rigidity of the metal wire 1, it can be manually inserted into the fiber preform, and at the same time, the dense fiber arrangement in the fiber preform can make the metal wire fixed in the fiber preform without falling off; the process method operates It is simple, does not requ...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 The present embodiment will be described. In this embodiment, the wire 1 is inserted in the thickness direction of the fiber preform 2 . This design makes the metal wire 1 and the composite material matrix 3 form a strong interfacial bond, which improves the performance of the fiber-reinforced metal matrix composite material in the direction of weakness such as thickness or interlayer. Since the metal wire 1 has high rigidity, it can be manually inserted into the fiber preform, and at the same time, the dense fiber arrangement in the fiber preform allows the metal wire to be fixed in the fiber preform without falling off.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination figure 1 The present embodiment will be described. The metal wire 1 of the present embodiment is inserted in the vertical direction between the fiber layers of the fiber preform. Utilizing the physical characteristics of the high strength of the metal wire itself and the strong interfacial bonding with the composite material matrix, the metal wire is "nailed" in the vertical (weak) direction between the fiber layers of the metal matrix composite material like a "nail". After the two-dimensional laying of fiber prefabricated parts, it is directly inserted in the vertical direction of the layup, because in the subsequent metal liquid infiltration process, the metal wire will have an interface reaction with the liquid matrix metal to form a certain thickness of the interface reaction layer 4. It leads to a proper bonding force between the metal wire and the matrix, and at the same time, the high strength of the metal wire eff...

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Abstract

The invention discloses a reinforcement method of a continuous fiber-reinforced metal matrix composite, relates to the fiber-reinforced metal matrix composite, and aims at solving the problems that the rigidity and the strength character of a structural piece of the fiber-reinforced metal matrix composite are low along the thickness direction, the strength of in-plane shear and interlaminar shear is low, the impact ductility is low, and delamination is easy to occur. The reinforcement method is realized according to the steps as follows: after a fiber prefabricated part (2) is prepared, a wire (1) is added in the fiber prefabricated part (2), the fiber prefabricated part (2) and a composite material matrix (3) are processed through molten metal infiltration by heating, and the reinforcement to the continuous fiber-reinforced metal matrix composite is completed after cooling. Because the wire originally has high strength and high toughness and has stronger binding capacity with the matrix, the existence of the wire effectively strengthens the strength between fibrous composite layers or the strength along the weak direction such as thickness, etc., increases the interlaminar strength, the impact ductility and the damage tolerance of fibrous composite, and avoids the demixion.

Description

technical field [0001] The invention relates to a method for reinforcing composite materials. Background technique [0002] Carbon fiber, graphite fiber, silicon carbide fiber and other fiber-reinforced metal matrix composites such as aluminum alloy and magnesium alloy are a new type of structural material, which has the advantages of high specific strength, high specific stiffness and designable material properties. However, the preparation method of fiber reinforced metal matrix composites is usually layer-by-layer winding, layer-by-layer lay-up or two-dimensional braiding. Low, low in-plane and interlaminar shear strengths, ease of delamination, and low levels of impact toughness and damage tolerance are issues that people have been trying to solve for many years. Contents of the invention [0003] The purpose of the present invention is to solve the problems of low stiffness and strength performance, low in-plane shear and interlaminar shear strength, easy delaminatio...

Claims

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Application Information

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IPC IPC(8): C22C47/08C22C111/00
Inventor 武高辉张云鹤陈国钦修子扬姜龙涛张强康鹏超苟华松
Owner HARBIN INST OF TECH
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