A Method for Improving Interlayer Bonding Strength of Winding Formed Carbon/Carbon Composite Materials
A technology of interlayer bonding strength and carbon composite materials, which is applied in the field of improving the interlayer bonding strength of winding carbon/carbon composite materials, which can solve the problem of limited interlayer reinforcement effect and difficulty in significantly improving the interaction between the long fiber layer and the short fiber layer, etc. problems, achieve the effect of improving corrosion resistance, ensuring bonding strength, and simple process
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Embodiment 1
[0039] This embodiment includes the following steps:
[0040] Step 1. Mandrel preparation: Determine the design density of the target product carbon / carbon composite material crucible to be 1.40g / cm 3 , the wall thickness is 18mm, the height is 400mm, the inner diameter of the straight section is 660mm, and the hoop tensile strength index is not less than 100MPa. Select No. 45 steel to process and manufacture the mandrel and assemble it, and clean the outer surface of the mandrel after assembly, and then Lay release cloth and brush release agent on the outer surface of the mandrel after cleaning, lay the graphite paper that brushes phenolic resin again to laying thickness and be 5mm; The profile of described mandrel is consistent with two target products The shape of the carbon / carbon composite crucible is similar after splicing. The outer diameter of the straight section of the mandrel is 650mm. The length of the mandrel is more than twice the height of the target product car...
Embodiment 2
[0050] The difference between this embodiment and Example 1 is: the design density of the target product charcoal / charcoal crucible side in step 1 is 1.65g / cm 3 , the bonding strength between layers is not less than 20MPa, the hoop tensile strength index is not less than 150MPa, the material of the core mold is electrode graphite, the outer diameter of the core mold is 600mm, and the carbon felt impregnated with furfurone resin is laid until the laying thickness is 30mm ; In step 2, the 24K polyacrylonitrile-based carbon fiber impregnated with furfurone resin ethanol solution is used for semi-dry winding, and the winding mode is alternate winding of hoop and spiral, wherein the angle of hoop winding is 89 °, and the angle of helical winding 85°, the net tire is laid after every 5 layers of winding, and the net tire surface density is 300g / cm 3 , and then use an acupuncture machine for acupuncture treatment under the mandrel rotation state, the acupuncture depth is 10mm, the ac...
Embodiment 3
[0053] The difference between this embodiment and embodiment 1 is: the design density of target product charcoal / charcoal crucible side in step 1 is 1.35g / cm 3 , the bonding strength between layers is not less than 12MPa, the hoop tensile strength index is not less than 60MPa, the material of the mandrel is electrode graphite, the outer diameter of the mandrel is 630mm, and the soft heat-resistant material laid on the mandrel is carbon fiber mesh The laying thickness of the tire is 15mm; in step 2, 1.5K viscose-based carbon fibers are used for hoop and spiral winding alternately, wherein the angle of hoop winding is 85°, the angle of helical winding is 20°, and the viscose-based carbon fiber Before winding, the carbon fiber is fully immersed in the ethanol solution of phenolic resin for wet winding. After every 8 times of alternating hoop and spiral winding, the mesh tire is laid and resin powder is sprayed. The mesh tread surface density is 160g / cm 3 , and then use an acupunc...
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Abstract
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