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Preparation method of environment-friendly, efficient and low-cost fiber-reinforced ceramic-based composite material carbon interface layer

A fiber-reinforced, composite material technology is applied in the field of preparation of carbon interface layers of environmentally friendly, high-efficiency and low-cost fiber-reinforced ceramic matrix composites, which can solve problems such as poor mechanical properties and stability, improve mechanical properties, reduce production safety risks, and reduce production cycles. short effect

Pending Publication Date: 2022-02-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes an environmentally friendly, high-efficiency, low-cost fiber-reinforced ceramic matrix composite carbon interface layer preparation method to overcome the chemical vapor infiltration (CVI) process in large thick-walled irregular fiber preforms The problem of poor stability of mechanical properties caused by the thickness gradient of the pyrolytic carbon interface layer prepared above

Method used

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  • Preparation method of environment-friendly, efficient and low-cost fiber-reinforced ceramic-based composite material carbon interface layer
  • Preparation method of environment-friendly, efficient and low-cost fiber-reinforced ceramic-based composite material carbon interface layer
  • Preparation method of environment-friendly, efficient and low-cost fiber-reinforced ceramic-based composite material carbon interface layer

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Embodiment 1

[0039] The fiber used in the carbon interface layer of the fiber-reinforced ceramic matrix composite material in this embodiment is carbon fiber, the fiber preform is a three-dimensional needle-punched fiber preform, and the resin is water-soluble phenolic resin. The preparation method of the fiber-reinforced ceramic matrix composite carbon interface layer comprises the following steps:

[0040] (1) Add 5 parts by weight of water-soluble phenolic resin and 95 parts by weight of deionized water to the reaction vessel, stir magnetically at a constant temperature at 40°C for 3 hours, and then wait for it to drop to room temperature to prepare a water-soluble phenolic resin with a concentration of 5% by weight. Reactive phenolic resin impregnating solution.

[0041] (2) Dip-coating a layer of resin film on the fiber surface of the carbon fiber prefabricated body by dipping and pulling film coating machine, and the pulling rate is set to 10mm / min. Then in a blast oven, keep warm a...

Embodiment 2

[0044] The fiber used in the carbon interface layer of the fiber-reinforced ceramic matrix composite material in this embodiment is carbon fiber, the fiber preform is a three-dimensional needle-punched fiber preform, and the resin is water-soluble epoxy resin. The preparation method of the fiber-reinforced ceramic matrix composite carbon interface layer comprises the following steps:

[0045] (1) Add 15 parts by weight of water-soluble epoxy resin and 85 parts by weight of deionized water in a reaction vessel, stir magnetically at a constant temperature for 2 hours at 20°C, and then wait for it to drop to room temperature to prepare a concentration of 15% by weight. Water-soluble epoxy impregnation solution.

[0046] (2) Dip-coating a layer of resin film on the fiber surface of the carbon fiber prefabricated body by dipping and pulling film coating machine, and setting the pulling rate at 20mm / min. Then in a blast oven, keep warm at 80°C and 120°C for 2 hours respectively to ...

Embodiment 3

[0049] The fibers used in the carbon interface layer of the fiber-reinforced ceramic matrix composite material in this embodiment are silicon carbide fibers, the fiber preform is a three-dimensional four-way fiber preform, and the resin is a water-soluble polyurethane resin. The preparation method of the fiber-reinforced ceramic matrix composite carbon interface layer comprises the following steps:

[0050] (1) Add 20 parts by weight of water-soluble polyurethane resin and 80 parts by weight of deionized water into the reaction vessel, stir at a constant temperature and magnetic force for 3 hours at 40°C, and then wait until it is lowered to room temperature to prepare a water-soluble polyurethane resin with a concentration of 20% by weight. Permanent polyurethane resin impregnating solution.

[0051] (2) Dip-coating a layer of resin film on the fiber surface of the silicon carbide fiber prefabricated body by dipping and pulling film coating machine, and setting the pulling ra...

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Abstract

The invention relates to a preparation method of an environment-friendly high-efficiency low-cost fiber-reinforced ceramic-based composite material carbon interface layer, which comprises the following steps of: with water-soluble resin as a precursor of pyrolytic carbon, a pyrolytic carbon interface layer is prepared on the surfaces of different fibers (carbon fibers, silicon carbide fibers, silicon nitrite fibers, alumina fibers, quartz fibers and the like) by adopting a dip-coating combined thermal cracking process. The method provided by the invention overcomes the technical problem of thickness gradient of the interface layer of a large thick-wall irregular component by a CVD (Chemical Vapor Deposition) or CVI (Chemical Vapor Infiltration) process, the prepared pyrolytic carbon interface layer is uniform and controllable in thickness, the interface layer is well combined with fibers, the function of the interface layer is fully exerted, and the mechanical property of the composite material is improved. In addition, the method has the advantages of short preparation period, simple process, low production cost, avoidance of use of organic solvents, reduction of production safety risks, benefit to environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a method for preparing a carbon interface layer of an environment-friendly, high-efficiency, and low-cost fiber-reinforced ceramic matrix composite material. Background technique [0002] With the rapid development of aviation, aerospace and nuclear energy industries, the demand for thermal structural materials with high specific strength, high specific modulus, high temperature resistance, corrosion resistance and neutron radiation resistance is becoming more and more urgent. As a new type of thermal structural material, fiber reinforced ceramic matrix composite not only inherits the high temperature resistance, wear resistance, high strength, high modulus, high hardness, low density, chemical corrosion resistance and high temperature creep resistance of single phase ceramics. And other advantages, it is endowed with metal-like fracture behavior characteristics of inse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B35/80
CPCC04B35/62873C04B35/80
Inventor 成来飞牛昌辉张青
Owner NORTHWESTERN POLYTECHNICAL UNIV
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