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Silicon carbide fiber solid fabric for in-situ growing carbon nano tubes, composite material and preparation method thereof

A technology of silicon carbide fibers and carbon nanotubes, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of low interlayer shear strength and easy delamination, and solve the problems of dispersion and orientation, good combination, The effect of resolving the problem of reunion

Active Publication Date: 2012-03-21
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a reinforcement of composite materials, there is no connection between layers of laminated and molded two-dimensional fiber fabrics, which directly leads to low interlayer shear strength of composite materials and easy delamination.

Method used

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  • Silicon carbide fiber solid fabric for in-situ growing carbon nano tubes, composite material and preparation method thereof
  • Silicon carbide fiber solid fabric for in-situ growing carbon nano tubes, composite material and preparation method thereof
  • Silicon carbide fiber solid fabric for in-situ growing carbon nano tubes, composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 The silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ of the present invention is shown, the silicon carbide fiber three-dimensional fabric is mainly woven from silicon carbide fibers, and the carbon nanotubes grown in situ are evenly distributed on the surface of the silicon carbide fibers , the carbon nanotubes are intertwined into a network structure. In this embodiment, the loading amount of carbon nanotubes is 4.1%-6.5%, the average length of carbon nanotubes is 3.8 μm, and the average diameter of carbon nanotubes is 50 nm-60 nm.

[0026]The silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ in this embodiment is prepared by the following steps:

[0027] (1) Pretreatment of silicon carbide fiber three-dimensional fabric: put the prefabricated three-dimensional four-way three-dimensional fabric of domestic KD-1 silicon carbide fiber in a muffle furnace, heat it in the air to 400°C, keep ...

Embodiment 2

[0032] like figure 2 The silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ of the present invention is shown, the silicon carbide fiber three-dimensional fabric is mainly woven from silicon carbide fibers, and the carbon nanotubes grown in situ are evenly distributed on the surface of the silicon carbide fibers , the carbon nanotubes are intertwined into a network structure. In this embodiment, the loading amount of carbon nanotubes is 4.94%, the average length of carbon nanotubes is 4 μm, and the average diameter of carbon nanotubes is 50 nm to 60 nm.

[0033] The silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ in this embodiment is prepared by the following steps:

[0034] (1) Pretreatment of silicon carbide fiber three-dimensional fabric: put the prefabricated three-dimensional four-way three-dimensional fabric of domestic KD-1 silicon carbide fiber in a muffle furnace, heat it in the air to 400°C, keep i...

Embodiment 3

[0039] A silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ according to the present invention, the silicon carbide fiber three-dimensional fabric is mainly woven from silicon carbide fibers, and the carbon nanotubes grown in situ are evenly distributed on the surface of the silicon carbide fibers, The carbon nanotubes are intertwined into a network structure. In this embodiment, the loading amount of carbon nanotubes is 10.8%, the average length of carbon nanotubes is 4.2 μm, and the average diameter of carbon nanotubes is 50 nm to 60 nm.

[0040] The silicon carbide fiber three-dimensional fabric with carbon nanotubes grown in situ in this embodiment is prepared by the following steps:

[0041] (1) Pretreatment of silicon carbide fiber three-dimensional fabric: put the prefabricated three-dimensional four-way three-dimensional fabric of domestic KD-1 silicon carbide fiber in a muffle furnace, heat it in the air to 400°C, keep it warm for 1 hou...

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Abstract

The invention discloses a silicon carbide fiber solid fabric for in-situ growing carbon nano tubes, which is formed by mainly weaving silicon carbide fibers. In the invention, in-situ grown carbon nano tubes are uniformly distributed on the surfaces of the silicon carbide fibers and mutually wound to form a reticular structure. The preparation method comprises the following steps of: pretreating the silicon carbide fiber solid fabric; loading a Ni-La-Al composite catalyst by adopting a catalyst precursor vacuum impregnation-reduction method; and finally, carrying out chemical gas-phase deposition to ensure that the carbon nano tubes are in-situ grown on the silicon carbide fiber solid fabric. The invention also discloses a carbon nano tube-silicon carbide fiber mixed enhanced composite material which is prepared by using silicon carbide as a substrate and the silicon carbide fiber solid fabric as a reinforcement body by adopting a traditional precursor impregnation-conversion method. The silicon carbide fiber solid fabric has the advantages of uniform carbon nano tube dispersion, higher and controllable carbon nano tube content, good combination with fibers, and the like.

Description

technical field [0001] The invention relates to an inorganic non-metallic material and a preparation method thereof, in particular to a special silicon carbide fiber three-dimensional fabric and a preparation method thereof. Background technique [0002] Carbon nanotubes (CNTs) have a large aspect ratio and a large specific surface area, their tensile strength is 100 times that of steel, nearly 2 times that of carbon fibers, and their density is only 1 / 6~1 of steel. / 7, the room temperature thermal conductivity of multi-walled carbon nanotubes was measured to be 3000 W m -1 ·K -1 . The mechanical properties of carbon nanotubes are significantly better than other whisker materials. At the same time, its excellent electrical and thermal conductivity can significantly improve the functionality of composite materials. The introduction of appropriate content of carbon nanotubes into traditional fiber reinforced ceramic matrix composites (FRCMC) , is expected to achieve the pur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74C01B31/02C04B35/84
Inventor 周新贵张长瑞曹英斌刘荣军余金山孙科王洪磊赵爽罗征王飞
Owner NAT UNIV OF DEFENSE TECH