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Preparation method of low-density carbon/carbon composite cylindrical material

A carbon composite and low-density technology, applied in the field of low-density carbon/carbon composite cylinder material preparation, can solve problems affecting performance and life, high cost, poor strength, etc., to improve material utilization, increase service life, The effect of enhancing the ability to resist external force and deformation

Active Publication Date: 2015-03-18
GANSU HAOSHI CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding effect of low-cost high-temperature adhesives is not ideal. During use, carbon felt and graphite felt are easy to delaminate and fall off, which seriously affects the performance and service life; some high-temperature adhesives with slightly better bonding effects The cost is too high, which seriously restricts the industrialization of low-density carbon / carbon composite materials
In recent years, patents CN102134068A, CN102616767A, etc. have provided several low-density foamed carbon / carbon composite materials prepared by new processes, which are relatively low in cost, but their strength is very poor, and they will be broken after a slight collision. Scale promotion

Method used

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  • Preparation method of low-density carbon/carbon composite cylindrical material
  • Preparation method of low-density carbon/carbon composite cylindrical material

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Experimental program
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Effect test

Embodiment 1

[0023] Preparation of Ordinary High Temperature Adhesives

[0024] Dissolve p-toluenesulfonic acid with industrial ethanol, wherein the weight ratio of industrial ethanol and p-toluenesulfonic acid is 100 parts: 12 parts, then stirred for 20 minutes, then gradually added 100 parts of phenolic resins and 6 parts of boric acid under stirring, and finally Add 80 parts of graphite into the solution, and continue stirring for 60 minutes to obtain a high-temperature binder.

[0025] The dimensions of the prepared low-density carbon / carbon composite cylinder are: D=1100mm, d=990mm, L=1800mm, and thickness 55mm.

[0026] A method for preparing a low-density carbon / carbon composite cylinder, the steps of which are

[0027] a. Prepreg carbon fiber cloth is used to prepare support layer 1, and the winding thickness is 3 mm;

[0028] b. Apply high-temperature adhesive on the support layer 1, wrap a layer of 12mm graphite felt on the support layer 1, pay attention to compressing when win...

Embodiment 2

[0037] The dimensions of the prepared low-density carbon / carbon composite tube are: D=596mm, d=460mm, L=1400mm, thickness 68mm:

[0038] a. The support layer 1 is prepared by winding prepreg carbon filaments, and the winding thickness is 3 mm;

[0039] b. Brush the high-temperature adhesive on the support layer 1, and then wrap the second layer of 10mm thick carbon felt on the support layer 1. When winding, the carbon felt is close to the support layer 1 and cannot be loosened. Use carbon rope to sew the interface;

[0040] c. On the basis of step b, use prepreg carbon wire to wrap the tension layer, the tension of the winding monofilament is 5N, and the winding thickness is 1mm;

[0041] d. On the tensioning layer 3 in step c, apply a high-temperature adhesive and wind carbon felt, the carbon felt is close to the tensioning layer 3, and the tensioning layer 3 is wrapped with carbon filaments with a thickness of 3 mm to form a preform;

[0042] e. Put the above preform into t...

Embodiment 3

[0048] The dimensions of the prepared low-density carbon / carbon composite tube are: D=1423mm, d=1260mm, L=1800mm, thickness 82mm:

[0049] a. The supporting layer is prepared by winding pre-preg carbon fiber cloth, and the winding thickness is 4mm;

[0050] b. Brush the high-temperature adhesive on the support layer 1, and then wrap a layer of 14mm thick carbon felt on the support layer 1. When winding, pay attention to compressing to ensure that the carbon felt is close to the support layer 1 and cannot be loosened. Use carbon rope to sew interface;

[0051] c. Wrap a layer of graphite paper on the basis of carbon felt in step b, with a thickness of 1mm;

[0052] d. On the basis of the graphite paper in step c, wrap the tension layer 3 with pre-impregnated carbon filaments, the tension of the winding monofilament is 5N, and the winding thickness is 1mm;

[0053] e. On the tension layer 3 in step d, apply a high-temperature adhesive again, and wrap 3 layers of graphite felt,...

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Abstract

The invention provides a preparation method of a low-density carbon / carbon composite cylindrical material. A structure of the low-density carbon / carbon composite cylindrical material is described as follows, from an inner side to an outer side: a support layer is arranged at a most internal side, and a plurality of the carbon felts or the graphite felts and a plurality of the tensioning layers, in an alternating manner, are arranged on the support layer. In the low-density carbon / carbon composite cylindrical material, structural advantages of the supporting layer and the tensioning layers are fully utilized, wherein a wrapping tensile force of carbon wires in the tensioning layers can increase resistance of layering and falling-off of interlamination, so that the cylindrical material totally has a certain pre-tensioning force and is increased in capability of resisting external forces and deformation. A common high-temperature bonding agent is employed during a preparation process so that a service life of the low-density carbon / carbon composite cylindrical material is effectively prolonged and the material is totally increased in utilization rate on the premise of not increasing a cost.

Description

technical field [0001] The invention belongs to the technical field of carbon / carbon composite material equipment, and in particular relates to a method for preparing a low-density carbon / carbon composite cylinder. Background technique [0002] Carbon / carbon composites are mainly composed of carbon fibers and carbon matrix, which inherit the excellent structural and thermal properties of both. Among them, the low-density carbon / carbon composite material has good thermal insulation function at high temperature, and the general density is 0.10g / cm 3 -0.3g / cm 3 Among them, it has high carbon content and less volatile impurities. Under the protection of vacuum or inert gas, the reliable service temperature is as high as 2800 ℃, and it is used for a long time. It has the characteristics of stable performance indicators and so on. It has been widely used in vacuum Furnace, monocrystalline silicon, polycrystalline silicon and various gem production industries. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
Inventor 柴昌盛杨子元吕小龙
Owner GANSU HAOSHI CARBON FIBER
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