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Carbon fiber power-based carbon/carbon composite preform and shaping method and application thereof

A carbon composite material and carbon fiber powder technology, applied in ceramic molding machines, manufacturing tools, etc., can solve problems such as limited application, and achieve the effects of reducing machining amount, reducing chemical vapor deposition time and deposition cost, and reducing consumption.

Pending Publication Date: 2017-06-13
HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this method requires a hot pressing device for hot pressing, especially when making large-sized products, a large-tonnage press is required, and products with complex shapes such as crucibles and draft tubes cannot be pressed, so its application is limited.

Method used

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  • Carbon fiber power-based carbon/carbon composite preform and shaping method and application thereof
  • Carbon fiber power-based carbon/carbon composite preform and shaping method and application thereof
  • Carbon fiber power-based carbon/carbon composite preform and shaping method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A carbon / carbon composite body based on carbon fiber powder, by weight, carbon fiber powder 30% to 80%, thermosetting resin 15% to 30%, curing agent 1.2% to 3.0%, graphite powder 0% to 50%, The flow aid is 0.1%~1.0%, the sum of each component is 100%, and the above raw materials are prepared after loading, curing and demoulding; the density of the carbon / carbon composite body is 0.7g / ㎝ 3 ~1.0g / ㎝ 3 , the strength meets the flow requirements of the process; the particle size of the carbon fiber powder is 100 mesh to 300 mesh; the graphite powder is flake graphite passing through a 800 mesh sieve; the thermosetting resin is phenolic resin; the curing agent is hexamethylene Tetramine; the flow aid is fumed silica.

[0034] A carbon / carbon composite body based on carbon fiber powder, by weight, carbon fiber powder 50% to 65%, thermosetting resin 15% to 30%, curing agent 1.2% to 3.0%, graphite powder 8% to 20%, The flow aid is 0.1%~1.0%, the sum of each component is 100%, a...

Embodiment 2

[0049] When adding materials, improve the fluidity of raw materials, the present invention in step (1), by weight, get carbon fiber powder 60%, thermosetting resin 23%, curing agent 1.8%, graphite powder 15%, flow aid 0.2%, each group The sum of the parts is 100%, and the 800㎜×800㎜×15㎜ carbon / carbon composite square plate green body is prepared after mold loading, curing and demoulding, and the density of the prepared green body is 0.72g / ㎝ 3 , the strength meets the requirements of the process flow, and the green body is prepared by chemical vapor deposition, machining, and chemical vapor deposition again to prepare 800㎜×800㎜×15㎜ carbon / carbon composite square plate products, and the product density is 1.26g / ㎝ 3 , the strength is 43MPa.

[0050] The rest are the same as embodiment 1.

Embodiment 3

[0052] Depend on figure 2 , image 3 It can be seen that, in step (1) of the present invention, by weight, 60% of carbon fiber powder, 23% of thermosetting resin, 1.8% of curing agent, 15% of graphite powder, 0.2% of flow aid, and the sum of each component is 100%, because The green body is in the shape of an annular plate, and the opening of the female mold 2 in this embodiment is the feeding port. Pour the ball-milled raw materials into the female mold 2, vibrate, and cover the male mold 1 after meeting the size requirements; after solidification and demoulding, a ring-shaped carbon / carbon composite body is prepared, and the prepared body The density is 0.71g / ㎝ 3 , the strength meets the requirements of the process flow, and the green body is prepared by chemical vapor deposition, machining, and chemical vapor deposition again to prepare a ring-shaped carbon / carbon composite product with a product density of 1.25g / ㎝ 3 , the strength is 44MPa. Compared with the tradition...

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Abstract

The invention discloses a carbon fiber power-based carbon / carbon composite preform which can be formed without hot pressing. The carbon fiber power-based carbon / carbon composite preform is characterized by 30 to 80 percent by weight of carbon fiber power, 15 to 30 percent by weight of thermosetting resin, 1.2 to 3.0 percent by weight of curing agent, 0 to 50 percent by weight of graphite powder and 0.1 to 1.0 percent by weight of flow-promoting agent, the sum of all the components is 100 percent, and the density of the preform is 0.7g / cm3 to 1.0g / cm3. A shaping method includes batching, moulding, curing and demoulding. The invention adopts the carbon fiber power to produce the preform with certain strength through a mould, the surface smoothness of the product is greatly increased, the consumption of the materials is reduced, the amount of machining is reduced, the time of subsequent chemical vapor deposition is shortened, the deposition cost is reduced, labor productivity is increased, the production cost of the carbon / carbon composite preform is also reduced, and the invention is applicable to the preparation of thermal field part preforms in a single-crystal furnace or a multi-crystal furnace or a heat treatment furnace or a powder metallurgy furnace.

Description

technical field [0001] The present invention relates to a carbon / carbon composite material, in particular to a carbon / carbon composite material body, a molding method and a molding die, in particular to a carbon / carbon composite material based on carbon fiber powder that does not require hot pressing Green body and forming method and application. Background technique [0002] Carbon / carbon composite materials are carbon fiber and pyrolytic carbon composite materials, which have the advantages of low density, high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, and high dimensional stability. It is one of the most promising high-temperature materials. Due to its unique properties, carbon / carbon composite materials have been widely used in aerospace, automobile industry, medicine and other fields. At present, its preparation method generally includes ① prefabricated body preparat...

Claims

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Application Information

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IPC IPC(8): C04B35/83B28B1/08B28B7/00B28B11/24
Inventor 廖寄乔刘学文谭周建王冰泉石磊李军王跃军
Owner HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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