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Method of improving damping performance of fiber reinforced magnesium base composite material

A composite material and fiber-reinforced technology, which is applied in the field of improving the damping performance of fiber-reinforced magnesium-based composite materials, can solve the problems of unsuitability for industrial production and complex directional solidification process, and achieve the effect of improved damping performance and high damping range

Inactive Publication Date: 2006-01-11
NINGBO SUNLIGHT MOTOR PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it was found that C.Mayencourt et al published a paper "High damping composite material: Mg 2 Research on Si / Mg", which proposed the preparation of fiber-reinforced composite Mg by directional solidification process 2 Si / Mg has the same tensile strength as the industrial casting magnesium alloy AZ63, but the damping performance has been improved by 10-100 times, but the directional solidification process is complicated and not suitable for industrial production, and it does not involve fiber surface modification to improve the damping performance of magnesium-based composites Content
Zhang Xiaonong and others published a paper "Research on Damping Behavior of Gr / Mg Composite Materials" in "Material Engineering" (1997, No.8:19-21), which studied the damping performance of magnesium-based composite materials reinforced with graphite fibers , but does not address the method of improving damping performance through fiber surface modification

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] T300 carbon fiber is used as reinforcement, and AZ91 magnesium alloy is used as matrix. Degumming is carried out by heating at 450° C. for 5 minutes under the protection of argon. The CVD process uses butane (C 4 h 10 ) as the pyrolysis gas, the CVD temperature is 800°C, and the deposition time is 5 minutes, a coating thickness of 2 μm can be obtained. The magnesium-based composite material is manufactured by liquid pressure impregnation process, and the damping performance of the composite material reaches a high damping range of 0.01.

Embodiment 2

[0014] T300 carbon fiber is used as reinforcement, and AZ91 magnesium alloy is used as matrix. Degumming is carried out by heating at 500° C. for 15 minutes under the protection of argon. The CVD process uses butane (C 4 h 10 ) as the pyrolysis gas, the CVD temperature is 1000° C., the deposition time is 60 minutes, and the coating thickness can be obtained as 20-30 μm. The magnesium-based composite is manufactured by liquid pressure impregnation process, and the damping performance of the composite reaches a high damping range of 0.015.

Embodiment 3

[0016] T300 carbon fiber is used as reinforcement, and AZ91 magnesium alloy is used as matrix. Degumming is carried out by heating at 550° C. for 30 minutes under the protection of argon. The CVD process uses butane (C 4 h 10 ) as the pyrolysis gas, the CVD temperature is 1200°C, the deposition time is 120 minutes, and a coating thickness of 200 μm can be obtained. The magnesium-based composite material is manufactured by liquid pressure impregnation process, and the damping performance of the composite material reaches a high damping range of 0.02.

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Abstract

A process for improving the damping performance of fibres reinforced Mg-base composition includes such steps as removing the colloidal layer from the surface of carbon (or graphite) fibre, thermodecomposing the high-C alkane gas to generate carbon, depositing it on the surface of said fibres by CVD to form a plated carbon layer, and pressure immersing of said fibres in the liquid magnesium or Mg-alloy. Its damping coefficient can reach 0.01.

Description

technical field [0001] The invention relates to a method in the technical field of composite materials, in particular to a method for improving the damping performance of fiber-reinforced magnesium-based composite materials. Background technique [0002] The damping properties of materials play an important role in controlling the vibration and noise of the structure, thereby also extending the service life of the material under cyclic loading or impact. In applications such as aerospace, the high damping performance of the material itself not only helps to maintain the high stability of the structure, but also reduces the additional damping design and increases the payload of the spacecraft. Therefore, it is of great significance to improve the damping performance of carbon or graphite fiber reinforced magnesium matrix composites. Since the interface of magnesium-based composites has a significant impact on its mechanical properties and damping properties, the modification...

Claims

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Application Information

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IPC IPC(8): C22C47/00C22C47/04C22C47/12C22C49/04C22C49/14
Inventor 张小农
Owner NINGBO SUNLIGHT MOTOR PARTS
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