A kind of interfacial layer reinforced aluminum alloy-silicon carbide double matrix fiber composite material and its preparation method

Abstract

The invention discloses an interface layer reinforced aluminum alloy-silicon carbide double-base fiber composite material and a preparation method therefor. The composite material consists of a fiberpreform, silicon carbide, an interface layer, and an aluminum alloy. The preparation method comprises the following steps of: (1) cleaning and drying the fiber preform; (2) in-situ filling a silicon carbide matrix into the fiber preform by adopting a precursor infiltration and pyrolysis method; (3) preparing the interface layer by adopting a chemical vapor deposition method and an electroless plating technology; (4) and infiltrating the aluminum alloy molten solution into a composite material prepared with the interface layer, so as to obtain the interface layer reinforced aluminum alloy-silicon carbide double-base fiber composite material. According to the interface layer reinforced aluminum alloy-silicon carbide double-base fiber composite material and the preparation method therefor, the interface compatibility problem of the ceramic matrix composite material and the aluminum alloy is solved, the wettability of the aluminum alloy to the ceramic matrix composite material is obviouslyimproved, and the aluminum alloy is fully functioned in toughening and strengthening. The composite material prepared by the invention is excellent in performance and is an important candidate advanced composite material in the aerospace field.

Description

technical field [0001] The invention relates to an aluminum alloy-silicon carbide double-base fiber composite material and a preparation method thereof, in particular to an interface layer reinforced aluminum alloy-silicon carbide double-base fiber composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced ceramic matrix composites have been widely used in aerospace, satellite, and military industries due to their excellent properties such as low density, high specific strength, high specific modulus, corrosion resistance, high temperature resistance, good thermal shock resistance, and good impact resistance. and the nuclear industry. However, when fiber-reinforced ceramic matrix composites are used in non-high-temperature (service temperature below 500°C) structural components such as rockets, aircraft, and satellites, especially for satellite support structures and other parts, due to the presence of pores in fiber-reinforced cerami...

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Problems solved by technology

[0010] Although the above alloy-modified ceramic matrix composites or ceramic-modified metal materials can improve the performance of the modified material, they have not improved the interfacial compatibility of ceramic and metal dissimilar materials, and have not effectively reduced the interfacial compatibility of ceramic matrix composites. The porosity and the reduction of defects, so that the performance of ceramic matrix composites and alloy materials cannot be truly exerted, and the role of alloys in toughening and reinforcing ceramic matrix composites cannot be exerted.

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