High-temperature-resistant wave-transparent ceramic-based composite material and preparation method thereof

A composite material and ceramic-based technology, applied in the field of high-temperature wave-transmitting ceramic-based composite materials and their preparation, can solve the effects of high-temperature resistance, mechanical properties, dielectric properties, and ablation resistance, impregnation of high-temperature wave-transmitting composite materials. problems such as low efficiency and high viscosity, to achieve excellent high temperature stability, high conversion efficiency, and ensure reliability and safety.

Inactive Publication Date: 2019-09-17
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the precursor of silicon nitride, perhydropolysilazane is a polymer material with high viscosity. When it is used as the impregnation solution of boron nitride fiber fabric, the impregnation efficiency is low, which affects the boron nitride fiber fabr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing a high-temperature-resistant wave-transmitting ceramic matrix composite material, which includes the following steps:

[0041] S1, completely soak the silicon nitride fiber fabric in ethyl acetate solution for 18h, the soaking pressure is 2MPa, then take out the soaked fabric, drain the solvent, put it in an oven, dry it at 80°C for 2h, and then cool the fabric to room temperature;

[0042] S21, transfer the liquid borazine precursor to a stainless steel impregnation container, completely impregnate the silicon nitride fiber fabric treated in step S1, pressurize the stainless steel impregnation container to 6MPa, keep the pressure for 6h, and then raise the temperature to 80°C Carry out the first heat treatment, the first heat treatment time is 48h;

[0043] S22, the above-mentioned high-pressure impregnation treatment and the first heat treatment of cycle step S21 are performed 4 times; The weight gain of silicon fiber f...

Embodiment 2

[0049] This embodiment provides a method for preparing a high-temperature-resistant wave-transmitting ceramic matrix composite material, which includes the following steps:

[0050] S1, completely soak the silicon nitride fiber fabric in the acetone solution for 12 hours, the soaking pressure is 0.5 MPa, then take out the soaked fabric, drain the solvent, put it in an oven, dry it at 60°C for 1 hour, and then cool the fabric to room temperature;

[0051] S21, transfer the liquid borazine precursor to a stainless steel impregnation vessel, completely impregnate the silicon nitride fiber fabric treated in step S1, pressurize the stainless steel impregnation vessel to 10 MPa, keep the pressure for 1 hour, and then raise the temperature to 70°C Carry out the first heat treatment, the first heat treatment time is 72h;

[0052] S22, the above-mentioned high-pressure impregnation treatment and the first heat treatment of cycle step S21 are performed 3 times; The weight gain of silic...

Embodiment 3

[0058] This embodiment provides a method for preparing a high-temperature-resistant wave-transmitting ceramic matrix composite material, which includes the following steps:

[0059] S1, completely immerse the silicon nitride fiber fabric in toluene solution for 24 hours, the immersion pressure is 5MPa, then take out the soaked fabric, drain the solvent, put it in an oven, dry it at 110°C for 3 hours, and then cool the fabric to room temperature;

[0060] S21, transfer the liquid borazine precursor to a stainless steel impregnation container, completely impregnate the silicon nitride fiber fabric treated in step S1, pressurize the stainless steel impregnation container to 1MPa, keep the pressure for 12h, and then raise the temperature to 100°C Carry out the first heat treatment, the first heat treatment time is 36h;

[0061] S22, the above-mentioned high-pressure impregnation treatment and the first heat treatment of the cycle step S21 are performed 6 times; The weight gain of...

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Abstract

The invention provides a high-temperature-resistant wave-transparent ceramic-based composite material. A preparation method for preparing the temperature-resistant wave-transparent ceramic-based composite material is further provided; the preparation method for preparing the temperature-resistant wave-transparent ceramic-based composite material comprises the following steps of (1) taking a silicon nitride fiber fabric, and conducting impregnating compound removal treatment on the surfaces of the silicon nitride fiber fabric; and (2) conducting high-pressure immersion treatment and thermal treatment on the silicon nitride fiber fabric treated in the step (1) by means of a borazine precursor to obtain the high-temperature-resistant wave-transparent ceramic-based composite material. Silicon nitride fibers are used as an enhancing phase, boron nitride converted from the borazine precursor is used as a matrix, the high-temperature-resistant wave-transparent ceramic-based composite material and the preparation method thereof are provided, and the high-temperature-resistant wave-transparent ceramic-based composite material has excellent high-temperature stability, high-temperature mechanical property, high-temperature dielectricity and ablation resistance performance.

Description

technical field [0001] The invention relates to the field of high-temperature-resistant wave-transmitting composite materials, in particular to a high-temperature-resistant wave-transmitting ceramic-based composite material and a preparation method thereof. Background technique [0002] Ultra-high temperature wave-transparent radome (or ultra-high-temperature wave-transparent antenna window) is a streamlined or pointed cone-shaped aerospace wave-transparent composite material structure located at the head of a missile (or rocket, aircraft), which integrates rectification, load bearing , wave penetration and heat protection as one. Ultra-high-speed missiles (or rockets, aircrafts) fly fast and work for a long time, and put forward more and more requirements for the performance of ultra-high temperature wave-transparent radome (or ultra-high-temperature wave-transparent antenna window) for long-term thermal protection, load bearing and wave transmission. Therefore, a high-tem...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/84
CPCC04B35/806C04B2235/386C04B2235/524C04B2235/96
Inventor 彭喆李松高龙飞付朝军张雪梅路秋勉肖沅渝万业强安楠
Owner 北京玻钢院复合材料有限公司
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