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A kind of interface modified fiber reinforced metal matrix composite material and its preparation method

A technology for modifying fibers and composite materials, which is applied in metal material coating process, liquid chemical plating, coating, etc., which can solve the problems affecting the performance of composite materials, difficult filling of metal, and adhesion of plating layers, etc., so as to avoid mutual Adhesion, temperature uniformity, effect of ensuring uniformity and consistency

Active Publication Date: 2022-03-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, when the surface modification treatment of inorganic fibers is carried out by electroless plating, the fibers are directly taken out and placed in an oven to dry after reduction treatment, which easily leads to the adhesion of the plating layers between the fiber tows, and the composite process of the metal matrix Among them, the metal is difficult to fill into the fiber bundle, which affects the performance of the composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Fiber-reinforced metal matrix composites modified with pyrolytic carbon and metallic copper at the interface, with a bulk density of 2.5 g / cm 3 , consisting of reinforced silicon carbide fibers, an interface layer and an aluminum metal matrix, characterized in that the reinforcing fibers are pre-woven into a fiber preform, the interface layer is evenly wrapped on the surface of the fiber, and the metal matrix is ​​filled in the fiber preform in situ; the said The reinforcing fiber is a silicon carbide fiber with a 2.5D woven structure and a fiber volume fraction of 35%; the interface layer is pyrolytic carbon and Cu, and the thickness of the interface layer is 0.5 μm; the metal matrix is ​​aluminum alloy.

[0020] The preparation method of above-mentioned composite material comprises the following steps:

[0021] (1) Weave the fiber into the required component shape to form a prefabricated body, using methane as the precursor, and then prepare the pyrolytic carbon inter...

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PUM

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Abstract

The invention discloses an interface-modified fiber-reinforced metal-matrix composite material, the volume density of which is less than 3.0g / cm 3 , consisting of reinforcing fibers, interface layer and metal matrix. The preparation method includes the following steps: weaving the reinforcing fiber into a fiber preform, preparing a chemical vapor infiltration coating and an electroless plating coating successively, then die-casting an aluminum alloy or copper alloy melt into the fiber preform, and cooling to obtain the interface modified fiber Reinforced metal matrix composites. The composite material fiber and the metal matrix prepared by the present invention have stable combination, excellent material performance, greatly improved bending strength, elastic modulus, and Brinell hardness, and the service temperature is also higher than that of aluminum alloy and copper alloy by more than 100°C respectively. It has important application value in loading field.

Description

technical field [0001] The invention relates to a fiber-reinforced metal-matrix composite material and a preparation method thereof, in particular to an interface-modified fiber-reinforced metal-matrix composite material and a preparation method thereof. Background technique [0002] As typical high-performance inorganic fibers, carbon fiber, silicon carbide fiber, alumina fiber and high-silica fiber have the advantages of light weight, high specific strength, high specific modulus, high temperature resistance, chemical corrosion resistance and low thermal expansion coefficient, and have been widely used It is used in aerospace, high-speed rail, automobile, sporting goods and nuclear industry and other fields. [0003] However, due to the high inertia of the surface of the inorganic fiber and the lack of active functional groups, when it is combined with a metal material, there are obvious compositional differences and interface incompatibility between the two, and the wetti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/04C22C47/06C22C47/08C23C18/31C23C16/32
CPCC22C47/04C22C47/06C22C47/08C23C18/31C23C18/1886C23C18/1639C23C16/32
Inventor 陈照峰廖家豪杨丽霞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS