Composite based on liquid silicon infiltration, carbon/carbon porous material and preparation method of carbon/carbon porous material
A composite material and porous body technology, which is applied in the field of thermal structure composite material manufacturing, can solve the problems of poor mechanical properties of carbon/carbon-silicon carbide composite materials, low content of continuous long fibers, etc., and achieves short preparation cycle, simple process flow, Avoid the effect of residual silicon
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[0051] The invention provides a method for preparing a carbon / carbon porous body suitable for a fusion siliconizing process, comprising the following steps:
[0052] Step 1), the carbon cloth is made into a carbon fiber reinforcement by a laminated stitching process;
[0053] Specifically, in the embodiment of the present invention, the carbon fiber is preferably one of T300-1K, T300-3K, T300-6K, T300-12K, T700-6K, T700-12K, T800-6K or T800-12K polyacrylonitrile-based carbon fiber One or more than one combination, carbon cloth is preferably satin weave, twill weave, plain weave or stretch cloth made of the above fibers;
[0054] In the embodiment of the present invention, the carbon fiber reinforcement with high fiber volume content is obtained by laminating the carbon cloth and then stitching, preferably the carbon cloth according to [0°] n , [0° / 90°] n or [0° / 45°] n Layers are laid up in the sequence of layers, wherein, n is the number of cycles, and then stitched, the st...
Embodiment 1
[0079] This embodiment provides a carbon / carbon porous body with a specification of 500mm×300mm×6mm and its carbon / carbon-silicon carbide composite material. The preparation method includes:
[0080] 1) Use general-purpose T300-3K polyacrylonitrile (PAN)-based carbon fiber to weave into eight pieces of satin cloth, and then cut it into 550mm×350mm carbon according to the directions of 0° (carbon cloth warp) and 90° (carbon cloth weft) cloth spare;
[0081] 2) Put the carbon cloth in step 1) according to [0° / 90°] 8 Lamination is carried out in the order of circular lamination, according to the volume density of the fabric ≥ 0.8g / cm 3 Control the density of carbon cloth layers, stack them up to the predetermined number of layers, and then stitch them along the thickness direction at a distance of 6 mm to form a three-dimensional fabric (carbon fiber reinforcement), in which two strands of T300-1K fibers are used for the stitching line;
[0082] 3) The three-dimensional fabric ...
Embodiment 2
[0091] This embodiment provides a carbon / carbon porous body with a specification of 500mm×300mm×6mm and its carbon / carbon-silicon carbide composite material. The preparation method includes:
[0092] 1) Use general-purpose T300-1K polyacrylonitrile (PAN)-based carbon fiber to weave into eight satin fabrics, and then cut them into 550mm×350mm carbon fabrics according to the directions of 0° (longitudinal phase of carbon cloth) and 90° (weft direction of carbon cloth). cloth spare;
[0093] 2) Put the carbon cloth in step 1) according to [0° / 90°] 15 Lamination is carried out in the order of circular lamination, according to the volume density of the fabric ≥ 0.8g / cm 3 Control the density of carbon cloth layers, stack them up to the predetermined number of layers, and then stitch them along the thickness direction at a distance of 6 mm to form a three-dimensional fabric (carbon fiber reinforcement), in which two strands of T300-1K fibers are used for the stitching line;
[0094...
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