Fiber reinforced carbon-silicon carbide ceramic matrix composite material and preparation method thereof

A silicon carbide ceramic-based, fiber-reinforced technology, which is applied in the field of composite material preparation, can solve the problems of affecting the mechanical properties and ablation resistance of C/C-SiC composite materials, and cannot achieve sufficient reaction, so as to improve the mechanical properties and anti-corrosion properties. Excellent ablative properties, excellent anti-ablation properties, and low free silicon content

Active Publication Date: 2019-02-01
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current RMI process generally uses liquid silicon fused carbon fiber reinforced carbon porous body (C/C porous body) to obtain C/C-SiC composite materials, silicon (Si) and carbon (C) react to form a silicon carbide matrix, and the Due to the uneven dist...

Method used

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  • Fiber reinforced carbon-silicon carbide ceramic matrix composite material and preparation method thereof
  • Fiber reinforced carbon-silicon carbide ceramic matrix composite material and preparation method thereof

Examples

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preparation example Construction

[0026] In a first aspect, the present invention provides a method for preparing a fiber-reinforced carbon-silicon carbide ceramic matrix composite material, the method comprising the following steps:

[0027] (1) Prepare one deck pyrolytic carbon layer (PyC layer) and one deck silicon carbide layer (SiC layer) successively on the surface of fiber prefabricated body, make modified fiber prefabricated body; The present invention does not have to adopted fiber prefabricated body For special requirements, for example, it can be a fiber preform with a needle-punched structure, a finely punctured structure or a stitched structure, preferably a needle-punched fiber preform, whose purpose is to serve as the skeleton of the ceramic matrix composite material of the present invention to enhance Toughening effect;

[0028] (2) impregnating the modified fiber preform obtained in step (1) with a resin solution comprising silicon powder (such as ultra-fine spherical silicon powder), phenolic...

Embodiment 1

[0063]A kind of preparation method of C / C-SiC composite material, its concrete steps are:

[0064] ①Put the carbon fiber prefabricated body into the CVI-C furnace, deposit it for 20 hours, and then put the carbon fiber prefabricated body deposited with the pyrolytic carbon layer into the CVI-SiC furnace, deposit it for 50 hours and release it from the furnace. A pyrolytic carbon layer with a thickness of 7 μm and a silicon carbide layer with a thickness of 5 μm were sequentially prepared on the surface of the body to obtain a modified fiber preform.

[0065] ② Vacuum impregnation of the modified fiber preform obtained in step ① using a resin solution containing silicon powder, graphene oxide and aminophenol-formaldehyde resin as an impregnating agent, and then the impregnated modified fiber preform is sequentially subjected to a pressure curing step and 800 ℃ high-temperature pyrolysis step; wherein, the mass ratio of silicon powder, graphene oxide and aminophenol-formaldehyde...

Embodiment 2

[0071] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0072] In ②, the mass ratio of silicon powder, graphene oxide and aminophenol-formaldehyde resin is 7:0.1:10.

[0073] In ③, repeat step ②, the process of vacuum impregnation-pressure curing-800°C high-temperature pyrolysis 3 times until the weight increase rate of the composite material is less than 1.0%, and the obtained density is 2.0g / cm 3 The C / C-Si composite material.

[0074] The performance test and the free content test in different matrix phases of the C / C-SiC composite material prepared in this example were carried out using the same test method as in Example 1, and the test results are shown in Table 1.

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Abstract

The invention relates to a fiber reinforced carbon-silicon carbide ceramic matrix composite material and a preparation method thereof. The method includes: (1) preparing a pyrolytic carbon layer and asilicon carbide layer on the surface of a fiber preform in order to obtain a modified fiber preform; (2) impregnating the modified fiber preform with a resin solution containing silicon powder, phenol-formaldehyde resin and an organic solvent, and then conducting curing and cracking steps on the impregnated modified fiber perform in order; (3) repeating the step (2) at least one time to obtain afiber reinforced carbon-silicon ceramic matrix composite material; and (4) subjecting the fiber reinforced carbon-silicon ceramic matrix composite material to high temperature treatment at 1350-1550DEG C for 0.5-2h, thus obtaining the fiber reinforced carbon-silicon carbide ceramic matrix composite material. The method provided by the invention can realize uniform distribution of silicon and carbon in the composite material and generation of silicon carbide by in-situ reaction, can reduce the content of free silicon in the composite material, and improves the mechanical properties and ablationresistance of the composite material.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a fiber-reinforced carbon-silicon carbide ceramic matrix composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced silicon carbide-based composites are ideal high-temperature structural materials and have broad application prospects in aerospace and other fields; for example, carbon fiber-reinforced silicon carbide-based composites have anti-oxidation, light weight, thermal shock resistance, and excellent high-temperature performance. Features, and thus widely used in aviation, aerospace and automotive and other fields. At present, there are three main manufacturing processes for such composite materials: gas phase infiltration (CVI), precursor pyrolysis (PIP) and reactive infiltration (RMI). [0003] At present, carbon fiber reinforced carbon-silicon carbide composites (C / C-SiC composites) are prepared...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/83C04B35/84
CPCC04B35/806C04B35/83C04B2235/48C04B2235/96
Inventor 杨冰洋王鹏金鑫宋环君于艺左红军霍鹏飞于新民刘俊鹏裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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