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Self-toughening substance containing type continuous fiber reinforced thermo-structure composite and preparation method thereof

A continuous fiber and composite material technology, applied in the field of materials, can solve the problems of poor high-temperature structural stability, complex preparation process, limited high-temperature application, etc., and achieve the effects of improving strength, simplifying preparation procedures, and widely available raw materials.

Active Publication Date: 2017-05-31
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The interfacial phase preparation process is complicated, the cost is high, and the high-temperature structural stability is poor, which limits the high-temperature application of thermal structural composites containing interfacial phase oxides

Method used

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  • Self-toughening substance containing type continuous fiber reinforced thermo-structure composite and preparation method thereof
  • Self-toughening substance containing type continuous fiber reinforced thermo-structure composite and preparation method thereof
  • Self-toughening substance containing type continuous fiber reinforced thermo-structure composite and preparation method thereof

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preparation example Construction

[0032] Such as figure 1 As shown, a method for preparing a self-toughening matrix and continuous fiber-reinforced thermal structural composite material according to an embodiment of the present invention includes the following steps:

[0033] S101: Weaving alumina fibers into a three-dimensional alumina fiber fabric. Specifically, using alumina long fibers as raw materials, alumina fiber fabrics with corresponding structures are prepared by weaving techniques such as three-dimensional four-way, three-dimensional five-way, three-dimensional six-way or three-dimensional orthogonal.

[0034] S102: Oxidizing the three-dimensional alumina fiber fabric to remove glue and impurities on its surface. Specifically, alumina fibers can be placed in a muffle furnace for high-temperature oxidation for a certain period of time, that is, glue and impurities on the surface can be removed.

[0035] S103: Mix the alumina sol and the silica sol in proportion, and adjust the pH value, so as to p...

Embodiment 1

[0041] Example 1 provides a preparation process of a self-toughening matrix and continuous fiber-reinforced thermal structural composite material. The composite material uses 42% three-dimensional alumina fiber fabric as reinforcement, and porous mullite + alumina as reinforcement. The matrix is ​​mainly composed of a mullite phase with a porous skeleton and a bonding phase and a dense alumina phase. Wherein in the matrix, the solid content of the porous mullite matrix is ​​60%, and the solid content of the alumina matrix is ​​40%. Specific steps are as follows:

[0042] (1) Preparation of fiber fabric: Alumina fiber fabric is used as raw material, and a three-dimensional orthogonal structure alumina fiber fabric is prepared by weaving process, and the volume fraction of alumina fiber fabric is controlled to be 42%.

[0043] (2) Pretreatment of alumina fiber fabric: put the alumina fiber fabric in step (1) into a muffle furnace, heat up to 550°C at 5°C / min in an air atmospher...

Embodiment 2

[0050] Example 2 provides a preparation process of a self-toughening matrix and continuous fiber-reinforced thermal structural composite material. The composite material uses 40% three-dimensional alumina fiber fabric as a reinforcement, and porous mullite + alumina as a The matrix is ​​mainly composed of a mullite phase with a porous skeleton and a bonding phase and a dense alumina phase. Wherein in the matrix, the solid content of the porous mullite matrix is ​​75%, and the solid content of the alumina matrix is ​​25%. Specific steps are as follows:

[0051] (1) Preparation of fiber fabric: Alumina fiber fabric is used as raw material to prepare three-dimensional five-directional structure alumina fiber fabric by weaving process, and the volume fraction of alumina fiber fabric is controlled to be 40%.

[0052] (2) Pretreatment of alumina fiber fabric: put the alumina fiber fabric in step (1) into a muffle furnace, raise the temperature to 500°C at 5°C / min in an air atmosphe...

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Abstract

The invention relates to a self-toughening substance containing type continuous fiber reinforced thermo-structure composite and a preparation method thereof. The self-toughening substance containing type continuous fiber reinforced thermo-structure composite comprises a substrate which consists of a porous mullite framework and an aluminum oxide substrate, and a reinforcement which is a three-dimensional continuous aluminum oxide fiber fabric, wherein the porous mullite framework is prepared from mullite powder which is converted through mullite sol; the aluminum oxide substrate is prepared according to an infiltration pyrolysis method using Al2Cl(OH)5 as a precursor. The self-toughening substance containing type continuous fiber reinforced thermo-structure composite is outstanding in mechanical property, high in bending intensity, high in high-temperature stability, and of great significance on the development of the technical field.

Description

technical field [0001] The invention relates to the field of materials, in particular to a thermal structural composite material containing a self-toughening matrix and reinforced by continuous fibers and a preparation method thereof. Background technique [0002] With the development of a new generation of aircraft in the aerospace field and the increase of the flight Mach number of high-speed aircraft, the higher and higher gas temperature and speed have put forward higher temperature resistance requirements for the materials of the engine and its surrounding components, making advanced composite materials Development and application are becoming more and more important. At present, the hot-end structural components of aero-engines require materials with high temperature resistance (the temperature of the hot-end parts has reached above 1600°C), high strength, high toughness, and environmental stability. Thermal structural composite materials provide the possibility for it...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/80
CPCC04B35/803C04B38/0045C04B2235/3217C04B2235/3463C04B2235/5256
Inventor 罗瑞盈王天颖
Owner BEIHANG UNIV
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