Bimetallic oxide-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structure wave absorbing material and preparation method thereof

Abstract

The invention relates to a bimetallic oxide silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structure wave absorbing material and a preparation method thereof. The method comprises the following steps: degumming a silicon carbide fiber cloth, and drying the degummed silicon carbide fiber cloth; growing a nickel cobaltate, zinc cobaltate or manganese cobaltate precursor on the surface of the dried silicon carbide fiber cloth through a hydrothermal technology, and annealing the obtained silicon carbide fiber cloth to form bimetallic oxide-silicon carbide fiber multi-scale reinforcements; uniformly coating the external surfaces of the bimetallic oxide-silicon carbide fiber multi-scale reinforcements with an aluminum phosphate slurry, laminating the coated reinforcements, and carrying out vacuum impregnation to obtain a fiber prepreg; and molding the fiber prepreg to obtain the bimetallic oxide silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structure wave absorbing material. Bimetallic oxide grows on the surface of the SiC fiber to effectively regulate the dielectric constant of SiCf / AlPO4 structure wave absorbing material, and makes the structure wave absorbing material have good wave absorbing effect and good mechanical properties.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a double-metal oxide-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structure wave-absorbing material and a preparation method thereof. Background technique [0002] The high temperature resistant structural radar absorbing material has become one of the important factors restricting the development of weapons and equipment. Among the high-temperature structural absorbing materials, continuous fiber reinforced ceramic matrix composites (CFRCMCs) have the most advantages. It has the advantages of high specific strength, high specific modulus, high toughness, etc. Through the design of the dielectric properties of the matrix and reinforcement, it can prepare high-temperature wave-absorbing materials with excellent performance. Continuous fiber-reinforced ceramic-based structural absorbing materials are currently mainly concentrat...

AI Technical Summary

Problems solved by technology

However, since the aluminum phosphate matrix is ​​a high-temperature wave-transmitting material, in order to achieve a good wave-absorbing effect, it is necessary to add a certain amount of nano-absorbents, such as carbon black, carbon nanotubes, silicon carbide, etc., in the process of preparing composite materials. The powder is easy to agglomerate and cause uneven dispersion in the matrix, which leads to poor controllability and uniformity of the dielectric properties of the structural absorbing material