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Magnesium alloy compound material enhanced by mixed carbon fibre and method of producing the same

A composite material and fiber reinforced technology, which is applied in the field of composite materials, can solve the problems of small degree of simultaneous adjustment, narrow performance adjustment range, and high equipment requirements, and achieve the effects of low energy consumption, low production cost, and few procedures.

Inactive Publication Date: 2009-06-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above work is that a single carbon fiber is used to reinforce the magnesium alloy, and the performance of the composite material is mainly adjusted by the volume fraction of the fiber, and the performance adjustment range is narrow, especially the degree of simultaneous adjustment of the strength and modulus is small; High pressure and high requirements for equipment

Method used

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  • Magnesium alloy compound material enhanced by mixed carbon fibre and method of producing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The strength of high-strength carbon fiber is 5000MPa and the modulus is 200GPa. The modulus of high-modulus carbon fiber is 550GPa and the strength is 3800MPa. The volume ratio of high-strength carbon fiber and high-modulus carbon fiber is 3:1. After the two carbon fibers are mixed Taking up 50% of the total composite material volume, the mass percentage of alloying elements in the composite magnesium alloy matrix is: Al: 6%, Zn: 0.5%, Sb: 0.1%, Sn: 0.1%, Be: 0.2%, Ti: 0.1 %, Si: 0.1%, Sr: 1%, the rest is Mg. The high-strength carbon fiber and high-modulus carbon fiber are immersed in an aqueous solution of 1% fluorine-zirconium salt mass concentration for 2 minutes, and then the above-mentioned fibers are taken out and dried. The volume ratio of high-strength carbon fiber and high-modulus carbon fiber is 3:1. Lay alternately in the mold cavity. Two fiber bundles are placed in parallel to form a prefabricated type. Then the matrix magnesium alloy powder is placed on the fi...

Embodiment 2

[0017] The strength of the high-strength carbon fiber is 5500MPa and the modulus is 300GPa, the modulus of the high-modulus carbon fiber is 600GPa, the strength is 4000MPa, the volume ratio of the high-strength carbon fiber and the high-modulus carbon fiber is 1:3, two types of carbon fiber After mixing, it accounts for 70% of the volume of the entire composite material. The mass percentage of alloying elements in the magnesium alloy matrix of the composite material is: Al: 9%, Zn: 1%, Sb: 2%, Sn: 1.2%, Be: 1.2%, Ti : 0.5%, Si: 0.5%, Sr: 1%, the rest is magnesium. The high-strength carbon fiber and high-modulus carbon fiber are immersed in an aqueous solution of 2% fluorine-zirconium salt mass concentration for 6 minutes, and then the above-mentioned fibers are taken out and dried. The volume ratio of high-strength carbon fiber and high-modulus carbon fiber is 1:3 Alternately placed in the mold cavity, two fiber bundles are placed in parallel to form a prefabricated type, and then...

Embodiment 3

[0021] The high-strength carbon fiber has a strength of 5200MPa and a modulus of 150GPa. The high-modulus carbon fiber has a modulus of 580GPa and a strength of 3900MPa. After the two types of carbon fibers are mixed, they account for 60% of the total composite volume. The composite material magnesium alloy The mass percentages of alloying elements in the matrix are: Al: 8%, Zn: 0.9%, Sb: 1%, Sn: 1%, Be: 1%, Ti: 0.3%, Si: 0.3%, Sr: 0.5%, the rest For magnesium. The high-strength carbon fiber and high-modulus carbon fiber are immersed in an aqueous solution with a mass concentration of fluoro-zirconium salt of 1.5% for 4 minutes, and then the above-mentioned fibers are taken out and dried. The volume ratio of high-strength carbon fiber and high-modulus carbon fiber is 1:1 Lay alternately in the mold cavity. The adjacent space around the high-strength fiber is high-modulus fiber. The two fiber bundles are laid in parallel to form a prefabricated type. The high-strength carbon fiber ...

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Abstract

A reinforced magnesium alloy composite material which is mixed with carbon fiber is characterized in that the composite material takes magnesium alloy as the matrix and is reinforced by mixing high-strength carbon fiber and high-modulus carbon fiber; the strength of the high-strength carbon fiber is 5000 to 5500 MPa and the modulus is between 200 to 300 GPa; the modulus of the high-modulus carbon fiber is 550 to 600 GPa and the strength is 3800 to 4000 MPa; the volume ratio of the high-strength carbon fiber and the high-modulus carbon fiber is 3:1 to 1:3; the two mixed carbon fibers occupy 50 percent to 70 percent of the whole volume of the composite material; the mass percents of the alloy elements in the composite material magnesium alloy matrix are: Al which is more than or equal to 6 percent and less than or equal to 9 percent, Zn which more than or equal to 0.5 percent and less than or equal to 1 percent, Sb which more than 0 percent and less than or equal to 2 percent, Be which is more than or equal to 0.2 percent and less than or equal to 1.2 percent, Ti which is more than 0 percent and less than or equal to 0.5 percent, Si which is more than 0 percent and less than or equal to 0.5 percent, Sr which is more than 0 percent and less than or equal to 1 percent and the rest is magnesium. The preparation method of the magnesium-based composite material is provided with a small number of procedures and simple process; the preparation needs no machine and the energy consumption and the production cost are low.

Description

1. Technical Field [0001] The invention belongs to the technical field of composite materials, and particularly relates to a magnesium alloy composite material reinforced by mixed carbon fibers and a preparation method thereof. 2. Background technology [0002] Existing technology: At present, magnesium alloy has been widely used in production due to its high specific strength and specific rigidity. Metal magnesium is light in weight. If carbon fiber is embedded in magnesium alloy, magnesium-based fiber-reinforced composite materials with lighter weight and higher performance can be formed, which can be used in a wider range of fields, such as aerospace, machinery, and construction. In 2000, Volume 2 and Issue 6 of Advanced Engineering Materials magazine published C.Koener's article on carbon fiber reinforced magnesium alloy. The carbon fiber used is a single material, and the pressure casting impregnation method is adopted. The impregnation pressure is 100 atmospheres. In 2006, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C49/04C22C47/02C22C47/14
Inventor 赵浩峰
Owner NANJING UNIV OF INFORMATION SCI & TECH