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An ultra-light, heat-insulating and erosion-resistant functionally integrated composite material and its preparation method
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A composite material and ceramic composite material technology, applied in the field of lightweight special material development, can solve the problems of limited light weight and high temperature resistance.
Active Publication Date: 2021-09-14
湖南合为新材料科技有限公司
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Problems solved by technology
In this technology, due to the obvious distinction of material functional layers and the introduction of beryllium copper and aramid fiber tows in the preparation process, its light weight and high temperature resistance are limited.
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Embodiment 1
[0071] A light-weight thermal insulation and erosion-resistant integrated composite material based on high-temperature wave absorption, the preparation process of which is as follows:
[0072] 1) Preparation of the outer layer of the heat-resistant structure with high temperature resistance and erosion resistance:
[0073] Fiber-reinforced ceramic matrix composites are prepared according to requirements; the alumina preform is a continuous alumina fiber cloth, and the alumina cloth is a satin cloth (its density is 0.9g / cm 3 ) with a thickness of 0.61mm.
[0074] The substrate is prepared by slurry impregnation and sintering method, and the impregnated ceramic slurry is made of Y 2 O 3 , ZrO 2 , SiO 2 , Al 2 O 3 , TiO 2 According to the mass ratio of 1:1:1:1:1 mixture, the particle size of the ceramic powder is 0.5 microns.
[0075] The thickness of the outer layer of the heat-resistant structure with high temperature resistance and erosion resistance is 0.65mm. Its de...
Embodiment 2
[0094] Other conditions are consistent with embodiment 1; the difference is:
[0095] 3) Preparation of high temperature adhesive
[0096] The high temperature adhesive is prepared by mixing and stirring polyazane silicon precursor, titanium alloy powder, silicon carbide powder and dispersant in a mass ratio of 35:30:30:5. The particle size of titanium alloy powder and silicon carbide powder is 1-2 microns; the dispersant is acrylic resin;
[0097] The properties of the obtained materials are shown in Table 2.
Embodiment 3
[0099] Other conditions are consistent with embodiment 1; the difference is:
[0100] 3) Preparation of high temperature adhesive
[0101] The high temperature adhesive is prepared by mixing and stirring polyazane silicon precursor, titanium alloy powder, silicon carbide powder and dispersant in a mass ratio of 80:15:4.5:0.5. The particle size of titanium alloy powder and silicon carbide powder is 1-2 microns; the dispersant is acrylic resin;
[0102] The properties of the obtained materials are shown in Table 3.
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Abstract
The invention relates to an ultra-light heat-insulating and erosion-resistant functionally integrated composite material and a preparation method thereof; it belongs to the technical field of lightweight special material development. The composite material includes a high-temperature-resistant and anti-scouring ceramic composite material layer, a bonding layer, and a high-temperature wave-absorbing and heat-insulating layer; the bonding layer is located between the high-temperature-resistant and scouring-resistant ceramic composite material layer and the high-temperature wave-absorbing and heat-insulating layer, and In direct contact with the two; the raw materials used for the bonding layer are composed of polysilazane precursor, titanium alloy powder, silicon carbide powder and dispersant mixed in a specific ratio. The integrated composite material provided by the invention has the functions of high temperature resistance, high Mach number erosion resistance, ultra-light weight, high porosity, high-temperature wave absorption and heat insulation, and can meet the requirements of high-temperature resistance, heat insulation, high-temperature wave absorption, and light weight in the aerospace field. Quality and other multi-functional integration needs. The invention has reasonable step design, simple and controllable process, and is convenient for large-scale industrial application.
Description
technical field [0001] The invention relates to an ultra-lightweight heat-insulating and erosion-resistant functional integrated composite material and a preparation method, and belongs to the technical field of light-weight special material development. Background technique [0002] Lightweight multifunctional composite materials are the current research hotspot, and they have broad application prospects in aerospace, missiles, transportation and other fields. In aerospace, structural lightweight is an eternal theme. Huge cost savings, while "stealth" in military aerospace equipment has also become one of the key directions of current research. In the research of multifunctional composite materials, people have done a lot of research. For example, the research on multifunctional composite materials in aerospace has entered from the initial dual-function (such as heat-proof / anti-nuclear) composite materials to three-functional (such as heat-proof / wave-transmitting / load-bear...
Claims
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