Fiber-enhanced integrated material with high-temperature resistance property and high emissivity and preparation method thereof

Abstract

The invention discloses a fiber-enhanced integrated material with high-temperature resistance property and high emissivity and a preparation method thereof. The preparation method comprises the following steps of using a carbon fiber felt as a framework support; filling the framework with a C-SiO2 (carbon-silicon dioxide) composite aerogel, so as to obtain the carbon fiber-enhanced C-SiO2 aerogel;coating a high-emissivity heat prevention coating layer to the surface of the carbon fiber-enhanced C-SiO2 aerogel; filling a C-SiO2 aerogel with high-temperature resistance property and low heat conductivity into the carbon fiber felt by a sol-gel method, a carbon dioxide super-critical drying technique and high-temperature heat treatment process, so as to form a heat isolation material with light weight, high-temperature resistance property and scouring resistance property; preparing a molybdenum disilicide-B2O3(boron oxide)-SiO2 glass coating layer at the surface of the heat isolation material by a slurry impregnating method and a quick heat treatment method, so as to form the fiber-enhanced integrated material with high-temperature resistance property and high emissivity. The fiber-enhanced integrated material has the advantages that the high temperature of 1500 DEG C can be resisted; the internal carbon fiber-enhanced C-SiO2 aerogel has lower heat conductivity of 0.035 to 0.045W.m<-1>.K<-1>; the emissivity of the surface heat protection coating layer at room temperature is greater than 0.85.

Description

Technical field [0001] The invention belongs to the field of preparation of anti-heat insulation materials, and specifically relates to a fiber-reinforced, high-temperature, high-emissivity integrated material and a preparation method thereof. Background technique [0002] Due to the high flight speed and long flight time of high Mach number aircraft, the serious aerodynamic heating problem generated on the surface of the aircraft puts higher requirements on the external insulation materials of the cabin and solid rocket motors. At present, the anti-insulation materials that are researched at home and abroad generally have problems such as high temperature resistance above 1000 ℃, insufficient thermal insulation and mechanical properties, etc., which are difficult to meet the surface impact and aerodynamic heating caused by the harsh external environment when flying in space or adjacent space. And thermal requirements. While carbon fiber reinforced C-SiO 2 Aerogel material overc...

AI Technical Summary

Problems solved by technology

At present, the anti-heat insulation materials that are mainly researched at home and abroad generally have problems such as high temperature resistance above 1000 °C, insufficient heat insulation and mechanical properties, and it is difficult to meet the mechanical properties of surface collision and aerodynamic heating caused by the harsh external environment when flying in space or adjacent space. and thermal requirements

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