A kind of fiber reinforced silicon boron nitrogen composite material and preparation method thereof

A fiber-reinforced, composite material technology, applied in the field of fiber-reinforced silicon boron nitride composite materials, can solve the problem of inability to remove surface solidification, and achieve the effect of promoting the impregnation-curing-cracking process, with less damage and a simple process flow

Active Publication Date: 2022-04-12
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is that when preparing nitride fiber reinforced silicon boron nitrogen composite material, after the polysilaborazane curing reaction in the PIP process, in the process of degumming the polysilaborazane cured product on the surface of the composite material , it is impossible to remove the cured material on the surface of the fiber preform without affecting the state of the fiber preform itself

Method used

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  • A kind of fiber reinforced silicon boron nitrogen composite material and preparation method thereof
  • A kind of fiber reinforced silicon boron nitrogen composite material and preparation method thereof
  • A kind of fiber reinforced silicon boron nitrogen composite material and preparation method thereof

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preparation example Construction

[0023] The present invention provides a kind of preparation method of fiber-reinforced silicon-boron-nitrogen composite material in the first aspect, and described preparation method comprises the following steps:

[0024] (1) Using silicon boron nitrogen fiber to prepare a fiber preform, and then using polysilaborazane to impregnate the fiber preform to obtain an impregnated fiber preform;

[0025] (2) Carry out initial curing reaction to the impregnated fiber preform described in step (1) at the first curing temperature, and when the polysilaborazane changes from a fluid state to a semi-fluid state, continue to cure at the first curing temperature. Keeping the temperature until the polysilaborazane is jelly-like to obtain an initially cured fiber preform with a polysilaborazane cured product on the surface;

[0026] (3) removing the cured polysilaborazane on the surface of the initially cured fiber preform, and then performing a secondary curing reaction on the fiber preform...

Embodiment 1

[0041] The silicon boron nitrogen fiber is processed into a fiber preform with a fiber volume content of 42% by weaving, which is used in the subsequent impregnation step, and the size of the fiber preform is 20cm*20cm*15mm. Vacuum impregnation method is used to impregnate the fiber preform, put the fiber preform fully impregnated with polysilaborazane into the oven, select 180°C as the first curing temperature, and react for 3 hours, and wait for the polysilaborazane cured product to flow When it becomes semi-fluid, continue to keep warm for 5 minutes. After taking it out, manually remove the jelly-like solidified material on the surface of the fiber preform, then put it into the oven, select 240°C as the second curing temperature, and keep it warm at this curing temperature for 6 hours. Make the polysilaborazane fully cured, and then take it out of the oven. At this time, the surface of the fiber preform is not covered with excess polysilaborazane cured material, and the poly...

Embodiment 2

[0043] Embodiment 2 is basically the same as Embodiment 1, except that the size of the fiber preform is 30cm*30cm*20mm.

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Abstract

The invention relates to a method for preparing a fiber-reinforced silicon-boron-nitrogen composite material. The preparation method comprises: (1) using silicon-boron-nitrogen fibers to prepare a fiber preform, and then impregnating the fiber preform with polysilaborazane treatment to obtain the impregnated fiber preform; (2) carry out the initial curing reaction on the impregnated fiber preform at the first curing temperature, and when the polysilaborazane changes from a fluid state to a semi-fluid state, continue in the second Insulation at a curing temperature until the polysilaborazane is jelly-like to obtain an initially cured fiber preform; (3) remove the polysilaborazane cured product on the surface of the initially cured fiber preform, and then place the fiber preform on Carry out secondary curing reaction at the second curing temperature to obtain a secondary cured fiber preform; (4) perform a cracking reaction on the secondary cured fiber preform to obtain a cracked fiber preform; (5) prefabricate the cracked fiber Repeat steps (1) to (4) at least once.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a novel curing treatment method for polysilaborazane in a fiber-reinforced silicon-boron-nitrogen composite material prepared by a PIP process and a fiber-reinforced silicon-boron-nitrogen composite material prepared by the method. Background technique [0002] With the development of various new types of aircraft towards higher speeds and longer flight times, higher requirements are put forward for high-performance wave-transparent materials that integrate high-temperature resistance, wave-transmission, and load-carrying functions. It can withstand greater loads and thermal shocks without damage at operating temperatures and harsher environments, while meeting electrical performance characteristics. Ceramic materials have good heat resistance, heat insulation, mechanical and dielectric properties, and have always been the first choice for high-temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/589C04B35/596C04B35/5835C04B35/622C04B35/80
CPCC04B35/589C04B35/583C04B35/622C04B2235/77C04B2235/96C04B2235/616C04B2235/656C04B2235/6567C04B2235/658C04B2235/524
Inventor 韩耀张冰清苗镇江王华栋孙志强董衡张剑吕毅
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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