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Carbon/carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material and preparation method thereof

A ceramic composite material and a silicon-boron-carbon-nitrogen technology are applied in the field of silicon-boron-carbon-nitrogen ceramic composite materials and their preparation, which can solve the problems of high cost, insignificant fiber strengthening and toughening effect, complicated preparation process, and the like, and achieve a short preparation period. , the effect of good comprehensive performance and simple process

Active Publication Date: 2014-03-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems that the existing fiber-reinforced silicon-boron-carbon-nitrogen ceramic composite materials have complex preparation process, high cost and inconspicuous fiber toughening effect due to too strong interfacial bonding, and provides carbon / carbon fiber-silicon-boron Carbon-nitrogen ceramic composite material and preparation method thereof

Method used

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  • Carbon/carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material and preparation method thereof
  • Carbon/carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material and preparation method thereof
  • Carbon/carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material and preparation method thereof

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specific Embodiment approach 1

[0018] Embodiment 1: The carbon / carbon fiber-silicon-boron-carbon-nitrogen ceramic composite material of this embodiment is prepared from short carbon fibers, phenolic resin, acetone and silicon-boron-carbon-nitrogen ceramic composite powder; the silicon-boron-carbon-nitrogen ceramic composite powder It is formed by ball milling silicon powder, graphite and hexagonal boron nitride powder; the mass ratio of the short carbon fiber to the phenolic resin is 1: (1-12); the mass ratio of the phenolic resin to the volume of acetone (10-60) g: 1L; the volume ratio of the short carbon fiber to the silicon-boron-carbon-nitrogen ceramic composite powder is (5-35): 100; the mass ratio of the silicon powder to graphite is 1: (0.1 ~1.5); the mass ratio of silicon powder to hexagonal boron nitride powder is 1: (0.1~1.2); the length of short carbon fiber is 1mm~2mm, and the diameter of single filament is 6μm~7μm; The purity of the silicon powder is 99% to 99.9%, and the particle size is 1 μm ...

specific Embodiment approach 2

[0020]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of the short carbon fiber to the phenolic resin is 1: (2-10); the ratio of the mass of the phenolic resin to the volume of acetone (20-50) g: 1L; the volume ratio of the short carbon fiber to the silicon-boron-carbon-nitrogen ceramic composite powder is (8-32): 100; the mass ratio of the silicon powder to graphite is 1: (0.1 ~1.2); the mass ratio of the silicon powder to the hexagonal boron nitride powder is 1: (0.1~1.0). Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of the short carbon fiber to the phenolic resin is 1: (3-9); the mass of the phenolic resin to the volume of acetone The ratio is (25-48) g: 1L; the volume ratio of the short carbon fiber to the silicon boron carbonitride ceramic composite powder is (16-24): 100; the mass ratio of the silicon powder to graphite is 1: (0.15-0.75); the mass ratio of the silicon powder to the hexagonal boron nitride powder is 1: (0.15-0.85). Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a carbon / carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material and a preparation method thereof. The invention relates to a short carbon fiber reinforced silicon, boron, carbon and nitrogen ceramic composite material and a preparation method thereof. The invention aims to solve the problem that the existing fiber reinforced silicon, boron, carbon and nitrogen ceramic composite material is complex in preparation process and high in cost, and the strengthening and toughening effect of the fibers is not remarkable due to over-strong interfacial adhesion. The product is prepared from short carbon fibers, phenolic resin, acetone and silicon, boron, carbon and nitrogen ceramic composite powder. The preparation method comprises the following steps: I, dissolving phenolic resin in acetone to prepare dipping liquor; II, putting the short carbon fibers in the dipping liquor to dip, and then splitting in an argon atmosphere to obtain carbon coating-coated short carbon fibers; III, putting silicon powder, graphite and hexagonal boron nitride in a ball mill to ball-mill and mix to obtain composite powder; and IV, after mixing the carbon coating-coated short carbon fibers with the composite powder, carrying out hot pressed sintering to obtain the carbon / carbon fiber-silicon, boron, carbon and nitrogen ceramic composite material.

Description

technical field [0001] The invention relates to a short carbon fiber reinforced silicon-boron-carbon-nitrogen ceramic composite material and a preparation method thereof. Background technique [0002] The covalent bond structure of the silicon-boron-carbon-nitrogen ceramic composite material itself endows it with high thermal stability, high temperature oxidation resistance, high temperature creep resistance, etc., and it has the advantages of low density and low elastic modulus. It is a new type of Multi-functional high-temperature heat-resistant materials for spacecraft nose cones, wing leading edges, rudder surfaces, covers and nozzles, etc. [0003] However, the high covalent bonding of ceramic itself makes it an inherently brittle material, which is prone to defects during use and leads to catastrophic failure, which limits its application to a certain extent. Therefore, the strengthening and toughening technology of ceramics has always attracted the attention of resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/80C04B35/58C04B35/622
Inventor 杨治华贾德昌潘丽君王胜金段小明梁斌
Owner HARBIN INST OF TECH
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