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Method for preparing super-high temperature anti-oxidation composite material

A composite material and anti-oxidation technology, applied in the field of aerospace materials, can solve the problems of cracking and peeling of the coating, poor high-temperature oxidation resistance, short working time, etc., to avoid ablation and improve the oxidation resistance.

Inactive Publication Date: 2017-11-03
常州武城服饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is: the C / C composite material used in traditional aircraft has poor high-temperature oxidation resistance, and after the traditional coating process is used, the coating is prone to cracking and falling off during use, and the working time is relatively short. and can not meet the use requirements above 2000 ℃, a preparation method of ultra-high temperature oxidation-resistant composite material is provided

Method used

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  • Method for preparing super-high temperature anti-oxidation composite material

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example 1

[0027]In parts by weight, take 10 parts of boron nitride, 20 parts of aluminum nitride, 20 parts of absolute ethanol, and 80 parts of organosilane in turn, pour them into a ball mill jar, and add zirconia ball mills according to the mass ratio of balls to materials at 10:1. Beads were ball-milled and mixed for 4 hours at a revolution speed of 200r / min and an autorotation speed of 400r / min to obtain a ball-milled slurry; polyacrylonitrile pre-oxidized silk was washed three times with deionized water, dried naturally, and then The dried polyacrylonitrile pre-oxidized silk felt was sequentially carded, laminated and needle-punched to obtain a polyacrylonitrile pre-oxidized silk felt, and the obtained polyacrylonitrile pre-oxidized silk felt was moved into a carbonization furnace and heated at 100mL / Feed nitrogen gas into the furnace at a rate of 1 min. Under nitrogen protection, the temperature is programmed to rise to 900 °C at a rate of 6 °C / min. After 30 min of carbonization, ...

example 2

[0029] In parts by weight, take 10 parts of boron nitride, 20 parts of absolute ethanol, and 80 parts of organosilane successively, pour them into a ball mill jar, add zirconia ball mill beads at a mass ratio of ball to material of 10:1, and rotate at a speed of 200r / min, under the condition of rotation speed of 400r / min, the ball mill was mixed for 4h to obtain the ball mill slurry; the polyacrylonitrile pre-oxidized wire was washed with deionized water for 3 times, then dried naturally, and then the dried polyacrylonitrile The acrylonitrile pre-oxygenated wires are carded, laminated and needled in turn to form felts to obtain polyacrylonitrile pre-oxidized wire mats, and the obtained polyacrylonitrile pre-oxidized wire mats are moved into the carbonization furnace, and flowed into the furnace at a rate of 100mL / min. Inject nitrogen, and under nitrogen protection, heat up to 900°C at a rate of 6°C / min. After 30 minutes of carbonization, stop feeding nitrogen, and feed water va...

example 3

[0031] In parts by weight, take 20 parts of aluminum nitride, 20 parts of absolute ethanol, and 80 parts of organosilane in turn, pour them into a ball mill jar, add zirconia ball mill beads at a mass ratio of ball to material of 10:1, and rotate at a speed of 200r / min, under the condition of rotation speed of 400r / min, the ball mill was mixed for 4h to obtain the ball mill slurry; the polyacrylonitrile pre-oxidized wire was washed with deionized water for 3 times, then dried naturally, and then the dried polyacrylonitrile The acrylonitrile pre-oxygenated wires are carded, laminated and needled in turn to form felts to obtain polyacrylonitrile pre-oxidized wire mats, and the obtained polyacrylonitrile pre-oxidized wire mats are moved into the carbonization furnace, and flowed into the furnace at a rate of 100mL / min. Inject nitrogen, and under nitrogen protection, heat up to 900°C at a rate of 6°C / min. After 30 minutes of carbonization, stop feeding nitrogen, and feed water vapo...

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Abstract

The invention discloses a method for preparing a super-high temperature anti-oxidation composite material and belongs to the technical field of aerospace materials. The method comprises the following steps: firstly, performing washing, combing, net overlapping and puncturing on a polyacrylonitrile pre-oxidized fiber in sequence so as to obtain a felt; further performing carbonization and activation with water steam so as to obtain a polyacrylonitrile-based activated carbon fiber felt; further performing electrochemical oxidation treatment, and mixing and soaking with ball-milling slurry consisting of aluminum nitride, boron nitride, absolute ethyl alcohol and organic silicon; further performing pre-sintering in the presence of argon, performing secondary soaking, and performing hot-pressing sintering molding in the presence of argon, thereby obtaining the super-high temperature anti-oxidation composite material. The product prepared by using the method is high in density and excellent in sintering erosion resistance and high-speed air flow impact resistance, is capable of meeting use requirements of high-temperature conditions of 2000 DEG C or greater, and has wide application prospects.

Description

technical field [0001] The invention discloses a preparation method of an ultra-high temperature anti-oxidation composite material, which belongs to the technical field of aerospace materials. Background technique [0002] The extreme environment of long-time flight, atmospheric re-entry flight and trans-atmospheric flight of aircraft has increasingly stringent requirements on the performance of structural materials. At present, the service temperature of traditional metal materials is close to its limit value, which cannot fully meet the service requirements. The problem of new structural materials has emerged, and its importance has been further highlighted, which directly affects the development process of aircraft and determines the success or failure of flight tests. [0003] Ultra-high temperature materials have many excellent properties such as high melting point, high specific strength, high thermal conductivity, high electrical conductivity, corrosion resistance an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/573C04B35/581C04B35/583
Inventor 牟建伟许蘅
Owner 常州武城服饰有限公司
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