Ceramic matrix composite material employing silicon alkyne-modified SiBCN as precursor and preparation method of ceramic matrix composite material

A composite material and precursor technology, applied in the field of ceramic materials, can solve the problem of less crosslinkable functional groups, and achieve the effects of good compactness, improved compactness, and excellent high-temperature oxidation resistance.

Active Publication Date: 2015-05-06
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Boron-containing precursors can endow ceramic products with good high-temperature oxidation resistance, but this type of precursor has fewer cross-linkable functional groups, and it is easy to form a porous structure during the cracking process, which requires high-pressure cracking or multiple immersions to obtain dense ceramic material

Method used

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  • Ceramic matrix composite material employing silicon alkyne-modified SiBCN as precursor and preparation method of ceramic matrix composite material
  • Ceramic matrix composite material employing silicon alkyne-modified SiBCN as precursor and preparation method of ceramic matrix composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Using three-way orthogonal structure T300 carbon fiber fabric as a reinforcement, make a 100mm×100mm flat plate sample, and the fabric fiber volume fraction is 40%.

[0025] (2) Under the protection of nitrogen gas flow, first add 500g of SiBCN precursor to a three-necked flask, then add 500ml of toluene, stir to dissolve, then add 500g of polysiliconacetylene, stir at room temperature for 2 hours, remove the solvent under reduced pressure, and continue at 70°C After stirring for 1 hour, a deep red viscous impregnation solution was obtained.

[0026] (3) Introducing the impregnation solution obtained in step (2) into the fabric prepared in step (1) by vacuum impregnation. At 60°C and a pressure of 0.2MPa, impregnate the impregnating liquid into the fabric for 2 hours. After the impregnation is complete, take out the green body and put it into a curing tank at a temperature of 60°C, and then heat it at 200°C. The temperature and the pressure of 3MPa are pressurized ...

Embodiment 2

[0034] (1) Using the three-way orthogonal structure T700 carbon fiber fabric as a reinforcement, a 100mm×100mm flat plate sample is made, and the fabric fiber volume fraction is 45%.

[0035] (2) Under the protection of nitrogen gas flow, first add 500g of SiBCN precursor to a three-necked flask, then add 500ml of toluene, stir to dissolve, then add 500g of polysiliconacetylene, stir at room temperature for 2 hours, remove the solvent under reduced pressure, and continue at 70°C After stirring for 1 hour, a deep red viscous impregnation solution was obtained.

[0036] (3) Introducing the dipping solution prepared in step (2) into the fabric prepared in step (1) by vacuum impregnation. At 60°C and a pressure of 0.2MPa, impregnate the impregnating liquid into the fabric for 2 hours. After the impregnation is complete, take out the green body and put it into a curing tank (60°C); at a temperature of 200°C and Pressure curing is carried out under 3 MPa pressure, the curing time i...

Embodiment 3

[0043] (1) Using the three-way orthogonal structure T300 carbon fiber fabric as a reinforcement, make a 100mm×100mm flat plate sample.

[0044] (2) Under the protection of nitrogen gas flow, first add 100g of SiBCN precursor to a three-necked flask, then add 500ml of toluene, stir to dissolve, then add 900g of polysiliconacetylene, stir at room temperature for 2 hours, remove the solvent under reduced pressure, and continue at 70°C After stirring for 1 hour, a deep red viscous impregnation solution was obtained.

[0045](3) Introducing the dipping solution prepared in step (2) into the fabric prepared in step (1) by vacuum impregnation. At 60°C and a pressure of 0.2MPa, impregnate the impregnating liquid into the fabric for 2 hours. After the impregnation is complete, take out the green body and put it into a curing tank (60°C); at a temperature of 200°C and Pressure curing is carried out under 3 MPa pressure, the curing time is 8 hours, and the temperature is slowly lowered ...

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Abstract

The invention relates to a ceramic matrix composite material employing silicon alkyne-modified SiBCN as a precursor and a preparation method of the ceramic matrix composite material, and belongs to the technical field of ceramic materials. Polysilylacetylene is introduced into an SiBCN precursor in a molecular level to prepare a silicon alkyne-modified SiBCN precursor, so that the compactness of the composite material ceramic matrix can be effectively improved; the ceramic yield is increased; and meanwhile, a split product can have excellent high-temperature oxidation resistance. The silicon alkyne-modified SiBCN precursor is adopted as impregnation matrix; a carbon fiber is taken as a reinforcement body; and the novel SiBCN ceramic matrix composite material is prepared by an infiltration pyrolysis method. The composite material has good mechanical property and excellent oxidation resistance.

Description

technical field [0001] The invention relates to a ceramic matrix composite material using silikyne modified SiBCN as a precursor and a preparation method thereof, belonging to the technical field of ceramic materials. Background technique [0002] Carbon fiber reinforced ceramic matrix composites are a kind of thermal structural materials with high temperature resistance, low density and high strength and toughness. They combine the superior mechanical properties of fiber reinforcements and good chemical and thermal stability of ceramic matrix. , Excellent thermophysical properties, ablation resistance and high dynamic and static friction and wear properties, etc., can be prepared into engineering components with complex shapes. The precursor impregnation cracking method is to impregnate the silicon-containing organic polymer precursor solution or melt into the porous fiber preform at a certain temperature and pressure, and then undergo drying and high-temperature heat treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/622
Inventor 冯志海胡继东陶孟孔磊李军平张国兵孙新
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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