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Fiber-strengthened ceramic-based wave-transmitting material and preparation method thereof

A fiber-reinforced, ceramic-based technology, which is applied in the field of wave-transparent composite material preparation, can solve the problems that the product strength is difficult to meet the radome, the high and low temperature dielectric properties are unstable, and the interlayer strength is not strong, and the bonding effect can meet the equipment requirements. Low, improve the interlayer strength, the effect of low sintering temperature

Active Publication Date: 2019-03-12
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of ceramic matrix composite materials, phosphate-based composite materials and alumina (mullite)-based composite materials that can be used in prepreg hand lay-up process are better in manufacturability, but their high and low temperature dielectric properties are unstable, and their dielectric loss Significant changes occur above 500°C and 650°C respectively, which limits the high-temperature application of the material; and the generally poor adhesion of the silica and nitride matrix determines that almost all silica, nitride-based composite materials are It is necessary to choose 2.5D, 3D overall weaving or stitching and needle-punched fabrics that use fibers to improve the interlayer strength of cloth layers as reinforcements to prepare composite materials and their components
[0004] If the existing sol-gel process is used to prepare fiber-reinforced silica-based wave-transparent composite materials that meet the prepreg hand lay-up process, the interlayer strength only depends on the weak bonding effect of the silica matrix, and the material is prone to decomposition. The layer is unstable, and the product strength is difficult to meet the requirements of the radome

Method used

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  • Fiber-strengthened ceramic-based wave-transmitting material and preparation method thereof
  • Fiber-strengthened ceramic-based wave-transmitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1. Raw material preparation

[0069] Mix commercially available low-temperature sintered alkali-free lead-free glass powder and fumed silica at a mass ratio of 10:90 to obtain reinforced powder. The glass powder includes the following components in mass percentage: B 2 o 3 : 30wt%; BiO 2 :35wt%; Al 2 o 3 : 10wt%; SiO 2 : 25wt%. Mix terpineol, ethyl cellulose, and the above-mentioned reinforcing powder at a mass ratio of 29:1:70, and grind to obtain an interlayer reinforcing slurry with a viscosity of 400-500 Pa.S.

[0070] 2. Preparation of single-layer prepreg

[0071] The reinforced 2D wave-transparent fiber fabric is quartz fiber satin cloth with a thickness of 0.28mm. Boil the quartz cloth in acetone three times to remove the wetting agent on the surface of the fabric. After the last boiling, wait for the acetone to drop to room temperature, soak and rinse the fabric in new acetone, and ventilate and dry it in a fume hood for later use.

[0072] Single-ply...

Embodiment 2

[0088] 1. Mix commercially available low-temperature sintered alkali-free lead-free glass powder and fumed silica at a mass ratio of 30:70 to obtain a reinforced powder. The glass powder includes the following components in mass percentage: B 2 o 3 : 35wt%; BiO 2 :30wt%; Al 2 o3 :15wt%; SiO 2 : 20wt%. Mix tributyl citrate, ethyl cellulose and the above-mentioned reinforcing powder at a mass ratio of 9.4:0.6:90, and grind to obtain an interlayer reinforcing slurry with a viscosity of 250-300 Pa.S.

[0089] The reinforced 2D wave-transparent fiber fabric is alumina fiber plain weave with a thickness of 0.14mm. Put the alumina cloth into a muffle furnace for high-temperature heat treatment to remove the wetting agent on the surface of the fabric for later use.

[0090] 2. Preparation of single-layer prepreg.

[0091] Cut the 2D fabric according to the size of the required material, with a density of 1.16g / cm 3 The prepreg is prepared by repeatedly brushing on the fiber cl...

Embodiment 3

[0104] 1. Mix self-synthesized low-temperature sintered alkali-free lead-free glass powder with fumed silica at a mass ratio of 20:80 to obtain a reinforced powder. The glass powder includes the following components in mass percentage: B 2 o 3 : 30wt%; BiO 2 :35wt%; Al 2 o 3 : 10wt%; SiO 2 : 25wt%. Mix terpineol, ethyl cellulose and the above-mentioned reinforcing powder at a mass ratio of 29:1:70, and grind to obtain an interlayer reinforcing slurry with a viscosity of 350-450 Pa.S.

[0105] The reinforced 2D wave-transparent fiber fabric is a woven plain weave of silicon boron nitrogen fiber. Put the woven cloth into acetone and boil three times, 12 hours each time, to remove the wetting agent on the surface of the fabric. After the last boiling, wait for the acetone to drop to room temperature, soak and rinse the fabric in new acetone, and ventilate and dry it in a fume hood for later use.

[0106] 2. The prepreg is prepared by cutting the 2D fabric on the curved su...

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Abstract

The invention provides a fiber-strengthened ceramic-based wave-transmitting material and a preparation method thereof. A plurality of fiber layers strengthen a silicon dioxide matrix and are distributed in the silicon dioxide matrix in parallel. Through adhesion of interlayer strengthened slurry, the interlayer strength of a 2D fiber strengthened silicon dioxide-based composite is greatly improved, so that the prepreg hand laying technology of a fiber-strengthened ceramic-based wave-transmitting composite is more practical, and the application range of the material is expanded.

Description

technical field [0001] The invention relates to a fiber-reinforced ceramic-based wave-transparent material and a preparation method thereof, belonging to the technical field of wave-transparent composite material preparation. Background technique [0002] The ceramic radome is an important part of the warhead structure of the guided weapon with high Mach number. Environmental impact, normal signal transmission work. Due to the strengthening and toughening effect of fibers, the reliability of fiber-reinforced ceramic matrix composites is significantly improved compared with materials such as composite ceramics and homogeneous ceramics. Fiber-reinforced ceramic matrix wave-transparent composites are also the first choice for high-state high-temperature resistant ceramic radomes Material. In the prior art, the wave-transmitting fibers in fiber-reinforced ceramic-based wave-transmitting composite materials mainly include quartz fibers, alumina fibers, nitride fibers, etc., and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/82C04B35/80C04B35/14
CPCC04B35/14C04B35/80C04B35/82C04B2235/96C04B2235/77C04B2235/602C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/5216C04B2235/522C04B2235/365
Inventor 张剑崔凤单于长清吕毅张天翔赵英民裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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