Carbon/ceramic heat-resistant composite material and preparation process thereof

A composite material, heat-resistant technology, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems that affect the scope of use of new composite materials, the degree of crystallization of granular graphite is not high, and the material’s low oxidation resistance temperature, etc., to achieve high stability and Oxidation resistance, anti-oxidation rate, high toughness effect

Inactive Publication Date: 2006-06-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the use of raw petroleum coke as a carbon source, the use of 400 mesh SiC and 500 mesh B 4 C is ceramic raw materials to prepare carbon / ceramic composite materials at 1600°C. The volatile content of raw petroleum coke in the raw materials determines the bonding ability of the material during sintering. The self-sintering process of green coke includes bonding and sintering at low temperature and sintering at high temperature. Solid phase sintering, the sintering process is complex and the granular graphite produced by green coke has a low degree of crystallization, so the oxidation resistance temperature of the material prepared by this method is relatively low, which affects the application range of this new composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1: Select C scales with an average particle size of 60 μm as the carbon source matrix, select SiC with an average particle size of 0.5 μm, and B with an average particle size of 1.5 μm 4 C and TiO with an average particle size of 1 μm 2 It is the raw material of ceramic phase. First, 25% SiC, 5% B 4 C and 6%TiO 2 Carry out ball milling and mixing, the ball milling medium is analytical pure acetone, the balls are alumina balls, ball milling for 12 hours, after the mixed powder is dried, put the above mixed powder and 64% C flakes in the agitator, and add 7% of the total material The acetone phenolic resin was used as a binding agent to stir, and the rotating speed was 200 rpm, and stirred for 20 minutes. Put the mixed raw materials into a graphite mold at room temperature, use a hydraulic press to generate a pressure of 25MPa, and mold it. Put the biscuit together with the mold into the vacuum sintering furnace. When the vacuum degree is less than 10Pa, raise...

example 2

[0023] Example 2: Select C flakes with an average particle size of 400 μm as the carbon source matrix, select SiC with an average particle size of 0.5 μm, and B with an average particle size of 1.5 μm 4 C and TiO with an average particle size of 1 μm 2 It is the raw material of ceramic phase. First, 35% SiC, 7% B 4 C and 9%TiO 2Carry out ball milling and mixing, the ball milling medium is anhydrous alcohol, the balls are alumina balls, ball milling for 12 hours, after the mixed powder is dried, put the above mixed powder and 49% C flakes in the agitator, and add 10% of the total material The acetone phenolic resin was used as a binding agent to stir, and the rotating speed was 200 rpm, and stirred for 20 minutes. Put the mixed raw materials into a graphite mold at room temperature, use a hydraulic press to generate a pressure of 25MPa, and mold it. Put the biscuit together with the mold into the vacuum sintering furnace. When the vacuum degree is less than 10Pa, raise the ...

example 3

[0024] Example 3: Select C flakes with an average particle size of 200 μm as the carbon source matrix, select SiC with an average particle size of 0.5 μm, and B with an average particle size of 1.5 μm 4 C and TiO with an average particle size of 1 μm 2 It is the raw material of ceramic phase. First, 50% SiC, 10% B 4 C and 12%TiO 2 Carry out ball milling and mixing, the ball milling medium is analytical pure acetone, and the balls are alumina balls, ball milling for 12 hours, after the mixed powder is dried, put the above mixed powder and 28% C flakes in the agitator, and add 13% of the total material The acetone phenolic resin was used as a binding agent to stir, and the rotating speed was 200 rpm, and stirred for 20 minutes. Put the mixed raw materials into a graphite mold at room temperature, use a hydraulic press to generate a pressure of 25MPa, and mold it. Put the biscuit together with the mold into the vacuum sintering furnace. When the vacuum degree is less than 10P...

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Abstract

The invention relates to a carbon/ceramic heat proof compounding material and the manufacturing method. The wt% of the material is C squama 25-65, ceramic powder SiC+B4C 30-60, of which SiC: SiC+B4C=5:1, TiO2 5-13, adopting acetone phenolic resin as binding agent. Mixing the constituents, molding at the pressure of 30-50MPa, keeping the temperature and cooling to room temperature, the material would be gained. The invention has the feature of light, high intensity, high toughness, antifriction, high temperature poof, and anti-oxidation.

Description

technical field [0001] The invention relates to a heat-resistant composite material and a preparation method thereof, in particular to a carbon / ceramic heat-resistant composite material and a preparation method thereof, more precisely to a C-SiC-B 4 C-TiB 2 Heat-resistant composite material and its preparation method. Background technique [0002] Carbon materials can be used as heat-resistant materials due to their low density, high temperature resistance, excellent thermal shock resistance, and strength that does not decrease with temperature. However, carbon materials are easily oxidized at high temperatures, which limits the scope of application. The current heat-resistant materials mainly use C / C composite materials. In order to improve the oxidation resistance and ablation resistance of the material, a high-temperature anti-oxidation coating is often coated on the surface of the material to protect the heat-resistant material. Heat-resistant materials often have to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52B28B3/00C04B35/56C04B35/622C04B35/634C04B35/645
Inventor 茹红强俞亮左良薛向新孙旭东
Owner NORTHEASTERN UNIV
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