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Carbon-silicon carbide double-ingredient substrate carbon fiber composite material as well as preparation method and application thereof

A composite material, carbon fiber preform technology, applied in the direction of brake discs, mechanical equipment, brake types, etc., can solve the problems of poor material friction stability, poor material performance stability, high temperature application field restrictions, etc., to achieve fast response and avoid corrosion. The effect of damage and reduction of production cost

Active Publication Date: 2018-09-11
湖南金羽先进材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation temperature of C / C-SiC composite materials prepared by the traditional LSI process is relatively high, and liquid Si is easy to react with the fiber, which will cause great damage to the carbon fiber; the residual Si content in the material is high, and the material will be lost when the temperature exceeds the melting point of Si. Mechanical strength, and the friction stability of the material is poor, and its high-temperature application field is limited; in addition, it is only suitable for the preparation of thin-walled parts, and the distribution of SiC in the thickness direction is uneven in the preparation of thicker composite materials, showing gradient distribution characteristics , the stability of the material performance is poor, and it is easy to crack and fail during use

Method used

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  • Carbon-silicon carbide double-ingredient substrate carbon fiber composite material as well as preparation method and application thereof
  • Carbon-silicon carbide double-ingredient substrate carbon fiber composite material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Preparation method of carbon-silicon carbide dual matrix carbon fiber composite material:

[0039](1) Using T700 12K PANCF carbon fiber as the raw material, the non-weft cloth / mesh tire with alternating intervals is used as the structural unit for continuous laying, and the laying method of the non-weft cloth is (0° / 45° / 90° / -45°), The ratio of non-weft cloth to net tire is 7:3, and the interlayer density is 12 layers / cm; the carbon fiber integral felt is made by continuous needling, and the needling density is 30 needles / cm 2 , to obtain a bulk density of 0.42 g / cm 3 Carbon fiber prefabricated body; the carbon fiber needle-punched integral felt is heat-treated at 1800°C under an argon protective atmosphere and kept for 2 hours;

[0040] (2) Using natural gas as the carbon source gas, a pyrolytic carbon coating was prepared on the surface of the carbon fiber by chemical vapor deposition. The deposition temperature was 1050 °C, the deposition pressure was 1.2 kPa, and th...

Embodiment 2

[0044] Preparation method of carbon-silicon carbide dual matrix carbon fiber composite material:

[0045] (1) Using T700 12K PANCF carbon fiber as the raw material, the non-weft cloth / mesh tire with alternating intervals is used as the structural unit for continuous laying, and the laying method of the non-weft cloth is (0° / 45° / 90° / -45°), The ratio of non-weft cloth to mesh tire is 75:25, and the interlayer density is 15 layers / cm; the carbon fiber integral felt is made by continuous needling, and the needling density is 30 needles / cm 2 , to obtain a bulk density of 0.48 g / cm 3 Carbon fiber prefabricated body; the carbon fiber needle-punched integral felt is heat-treated at 1800°C under an argon protective atmosphere and kept for 2 hours;

[0046] (2) Using natural gas as the carbon source gas, a pyrolytic carbon coating was prepared on the surface of carbon fibers by chemical vapor deposition. The deposition temperature was 1000 °C, the deposition pressure was 1.5 kPa, and t...

Embodiment 3

[0050] Preparation method of carbon-silicon carbide dual matrix carbon fiber composite material:

[0051] (1) Using T700 12K PANCF carbon fiber as the raw material, the non-weft cloth / mesh tire with alternating intervals is used as the structural unit for continuous laying, and the laying method of the non-weft cloth is (0° / 45° / 90° / -45°), The ratio of non-weft cloth to mesh tire is 8:2, and the interlayer density is 16 layers / cm; the carbon fiber integral felt is made by continuous needle punching, and the needle punch density is 40 needles / cm 2 , to obtain a bulk density of 0.51 g / cm 3 Carbon fiber prefabricated body; the carbon fiber needle-punched integral felt is heat-treated at 2000°C under an argon protective atmosphere and kept for 1 hour;

[0052] (2) Using natural gas as the carbon source gas, a pyrolytic carbon coating was prepared on the surface of carbon fibers by chemical vapor deposition. The deposition temperature was 980 °C, the deposition pressure was 1.3 kPa...

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Abstract

The invention discloses a carbon-silicon carbide double-ingredient substrate carbon fiber composite material as well as a preparation method and application thereof. The method comprises the followingsteps of (1) performing weaving and high-temperature heat treatment on a carbon fiber prefabricated body; (2) preparing a porous carbon / carbon blank body; (3) introducing carbon elements and siliconelements into the carbon / carbon blank body in an impregnating mode; after the soaking and pyrolysis circulation period, obtaining a Cf / Cm-Sim porous intermediate; (4) performing embedded fusion Si seeping on the Cf / Cm-Sim porous intermediate to obtain a Cf / Cm-SiCm composite material. The inside SiC distribution of the composite is uniform; the residue Si content is 1.2 to 3.3 percent; the bendingintensity is 236 to 275MPa; the compression intensity is 322 to 364MPa; the dynamic friction coefficient is 0.32 to 0.48; the mechanical / friction performance is excellent; the thermal stability and the environment applicability are high; the material is applicable to the manufacturing of automobile braking discs / sheets.

Description

technical field [0001] The invention belongs to the field of C / C-SiC friction materials, and specifically relates to a carbon-silicon carbide dual matrix carbon fiber composite material, its preparation method and application. Background technique [0002] C / C-SiC composite materials have the advantages of low density, wear resistance, smooth braking, oxidation resistance, high temperature resistance, corrosion resistance, strong environmental applicability, and long life. As a new generation of high-performance friction materials, they are used in aircraft braking systems , high-speed train braking system, maglev train braking system, automobile braking system, construction machinery braking system and other fields have good application prospects. [0003] Melted silicon infiltration (LSI) is the most widely used preparation method for C / C-SiC composites. It has the advantages of low material porosity, near-net shape, short preparation cycle, and low cost. The principle is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/84C04B35/80F16D65/12
CPCC04B35/806C04B2235/3826C04B2235/5248C04B2235/608C04B2235/77C04B2235/96F16D65/126
Inventor 熊翔王雅雷陈招科孙威曾毅吕东泽
Owner 湖南金羽先进材料有限公司
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