Method for preparing carbon/carbon composite material by liquid precursor atomization

Abstract

The invention discloses a method for preparing a carbon / carbon composite material by liquid precursor atomization. The method comprises: a multiple-point pressure spraying device is adopted to inject precursors into a reactor and a precast body in a liquefaction spraying way, and liquid phase-atomization-gasification rapid deposition is carried out, thus obtaining the carbon / carbon composite material with the density of 1.6-1.8g / cm<3>.The invention has the advantages that the liquid precursor boiling gasification link is omitted, the energy consumption is reduced, and the controllability of precursor concentration and feeding is realized, the control and regulation of liquid hydrocarbon precursor amount are easier, the utilization factor of liquid hydrocarbon is greatly improved, the effect is obvious in trial-production, and the carbon / carbon composite material with the density reaching up to 1.8g / cm<3> is prepared in 8 hours successfully.

Description

Technical field:

[0001] The invention belongs to the field of composite materials, and relates to a rapid preparation method of composite materials, in particular to a method for preparing carbon / carbon composite materials using liquid precursor atomization as a carbon source. Background technique:

[0002] Carbon / carbon composites (C / C, carbon / carbon composites) have been widely used in space shuttle wing leading edges, nose cones, rocket engine nozzles, throat liners, and aircraft brake discs. The role of structural materials and functional components in the aerospace field is irreplaceable. The latest method for preparing carbon / carbon is the chemical liquid-vaporized infiltration (CLVI, or Film boiling CVI, FBCVI), which is the same as the traditional preparation method of carbon / carbon composites. Compared with the liquid phase (resin, pitch) impregnation carbonization method (Chemical vapor infiltration, CVI), the densification rate is the highest, which greatly shortens t...

Examples

Embodiment 1

[0082] Embodiment 1: According to the technical solution of the present invention, combined with the attached figure 1 , The carbon felt produced by Lanzhou Carbon Factory is used as the preform, and the density of carbon felt is 0.1g / cm 3 , Is composed of short fibers in any direction. The specific steps for preparing a hollow cylindrical carbon / carbon composite material using the method of the present invention are as follows:

[0083] (1) Prepare a porous preform and cut the 2D carbon fiber into a hollow cylinder with an outer diameter of Φ150mm, an inner diameter of Φ100mm, and a height of 100mm;

[0084] (2) Prepare the graphite heating element and its accessories. Process the graphite heating element to a diameter of Φ100mm and a thickness of 110mm. At the same time, prepare insulation materials of a certain size and shape to protect the furnace body;

[0085] (3) Put the heat insulation material, graphite heating element, and porous preform into the reactor in order, and place...

Embodiment 2

[0093] Embodiment 2: According to the technical solution of the present invention, combined with figure 2 , Using PAN-3k 2D carbon fiber as a porous preform with a density of 0.5g / cm 3 . The specific steps for preparing four pieces of massive carbon / carbon composite material by using the method of the present invention are as follows:

[0094] (1) Prepare the porous preform and cut the 2D carbon fiber into four 100×100×20mm 3 Cuboid shape

[0095] (2) Prepare the graphite heating element and its accessories, and process the graphite heating element into two 120×100×30mm 3 In the shape of a rectangular parallelepiped, a certain size and shape insulation material is prepared according to the size of the reaction chamber to protect the furnace body;

[0096] (3) Put the heat insulation material, graphite heating element, and porous preform into the reactor in order to ensure that one side of the preform is in close contact with the heating surface of the heating element to form a high...

Technical field:

[0001] The invention belongs to the field of composite materials, and relates to a rapid preparation method of composite materials, in particular to a method for preparing carbon / carbon composite materials using liquid precursor atomization as a carbon source. Background technique:

[0002] Carbon / carbon composites (C / C, carbon / carbon composites) have been widely used in space shuttle wing leading edges, nose cones, rocket engine nozzles, throat liners, and aircraft brake discs. The role of structural materials and functional components in the aerospace field is irreplaceable. The latest method for preparing carbon / carbon is the chemical liquid-vaporized infiltration (CLVI, or Film boiling CVI, FBCVI), which is the same as the traditional preparation method of carbon / carbon composites. Compared with the liquid phase (resin, pitch) impregnation carbonization method (Chemical vapor infiltration, CVI), the densification rate is the highest, which greatly shortens t...

Examples

Embodiment 1

[0082] Embodiment 1: According to the technical solution of the present invention, combined with the attached figure 1 , The carbon felt produced by Lanzhou Carbon Factory is used as the preform, and the density of carbon felt is 0.1g / cm 3 , Is composed of short fibers in any direction. The specific steps for preparing a hollow cylindrical carbon / carbon composite material using the method of the present invention are as follows:

[0083] (1) Prepare a porous preform and cut the 2D carbon fiber into a hollow cylinder with an outer diameter of Φ150mm, an inner diameter of Φ100mm, and a height of 100mm;

[0084] (2) Prepare the graphite heating element and its accessories. Process the graphite heating element to a diameter of Φ100mm and a thickness of 110mm. At the same time, prepare insulation materials of a certain size and shape to protect the furnace body;

[0085] (3) Put the heat insulation material, graphite heating element, and porous preform into the reactor in order, and place...

Embodiment 2

[0093] Embodiment 2: According to the technical solution of the present invention, combined with figure 2 , Using PAN-3k 2D carbon fiber as a porous preform with a density of 0.5g / cm 3 . The specific steps for preparing four pieces of massive carbon / carbon composite material by using the method of the present invention are as follows:

[0094] (1) Prepare the porous preform and cut the 2D carbon fiber into four 100×100×20mm 3 Cuboid shape

[0095] (2) Prepare the graphite heating element and its accessories, and process the graphite heating element into two 120×100×30mm 3 In the shape of a rectangular parallelepiped, a certain size and shape insulation material is prepared according to the size of the reaction chamber to protect the furnace body;

[0096] (3) Put the heat insulation material, graphite heating element, and porous preform into the reactor in order to ensure that one side of the preform is in close contact with the heating surface of the heating element to form a high...

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