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Fiber-reinforced ceramic matrix composite material, preparation method and application thereof

A fiber-reinforced, composite material technology, used in lighting and heating equipment, furnace components, furnaces, etc., to achieve the effect of simple process, excellent interlaminar shear strength, and increased density

Active Publication Date: 2019-12-13
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain fiber-reinforced ceramic matrix composites with better mechanical properties and fracture toughness, there is still a large gap between the thickness of the composites and the thickness requirements of large-thickness composite products.

Method used

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  • Fiber-reinforced ceramic matrix composite material, preparation method and application thereof
  • Fiber-reinforced ceramic matrix composite material, preparation method and application thereof
  • Fiber-reinforced ceramic matrix composite material, preparation method and application thereof

Examples

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preparation example Construction

[0042] Specifically, refer to figure 1 , the preparation method of the fiber-reinforced ceramic matrix composite provided by the invention comprises the following steps:

[0043] A step of preparing a glue solution for impregnating the fiber preform;

[0044] The step of vacuum impregnating the fiber preform with the glue solution;

[0045] The step of ultrasonically vibrating the system comprising the fiber preform and the glue for impregnation after vacuum impregnation;

[0046] The step of introducing compressed gas into the environment where the system is located after the ultrasonic vibration is finished;

[0047] a step of curing the pressurized material;

[0048] performing the steps of drying and sintering the cured material in sequence;

[0049] A step of densifying the sintered material.

[0050]In addition, the present invention also optimizes the specific technical parameters in the two steps of ultrasonic vibration and pressurization. Better ultrasonic vibra...

Embodiment 1

[0085] First, a fiber preform made of quartz fiber fabric with a thickness of 50 mm is placed in an impregnation tool, and an ultrasonic device is provided in the impregnation tool for ultrasonic vibration. Vacuum the tooling by 0.1MPa, pump the silica sol into the tooling, and the slurry is submerged in the fabric to end the glue feeding. Then, start the ultrasonic device to ultrasonically vibrate the fiber prefabricated body and glue in the tooling to break and eliminate the air holes in the fabric. The ultrasonic power is 50W, the ultrasonic frequency is 20KHz, the ultrasonic energy transmission rate is 0.1w / g, and the ultrasonic time is 0.5h. Subsequently, the compressed air is introduced into the tooling so that the inside of the tooling has an air pressure of 1 MPa, and the pressing time is 1 hour. Next, the whole tooling is placed in an oven at 50° C. to initiate a gelation reaction of the slurry in the tooling, so that the slurry inside the preform is solidified and r...

Embodiment 2

[0087] First, a fiber preform made of alumina fiber fabric with a thickness of 50 mm is placed in an impregnation tool, and an ultrasonic device is installed in the impregnation tool for ultrasonic vibration. Vacuum the tooling by 0.1MPa, pump the silica sol into the tooling, and the slurry is submerged in the fabric to end the glue feeding. Then, start the ultrasonic device to ultrasonically vibrate the fiber prefabricated body and glue in the tooling to break and eliminate the air holes in the fabric. The ultrasonic power is 50W, the ultrasonic frequency is 20KHz, the ultrasonic energy transmission rate is 0.1w / g, and the ultrasonic time is 0.5h. Subsequently, the compressed air is introduced into the tooling so that the inside of the tooling has an air pressure of 1 MPa, and the pressing time is 1 hour. Next, the whole tooling is placed in an oven at 50° C. to initiate a gelation reaction of the slurry in the tooling, so that the slurry inside the preform is solidified and...

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Abstract

The invention relates to a fiber-reinforced ceramic matrix composite material, a preparation method and application thereof. The preparation method includes: (1) a step of preparation of a glue solution for impregnating a fiber preform; (2) a step of vacuum impregnation; (3) a step of curing; (4) a step of drying and sintering, and (5) a step of densification. Between the step (2) and the step (3), the method also includes the steps of: (i) carrying out ultrasonic vibration on a system containing the fiber preform and the glue solution for impregnation at the end of vacuum impregnation; and (ii) introducing compressed gas into the environment where the system is located at the end of ultrasonic vibration for pressurization, making the pressure of the environment where the system is locatedreach 1-4MPa, and keeping the maintaining time at 1-24h. The preparation method provided by the invention can prepare the fiber-reinforced ceramic matrix composite material which has thickness of 50mm or more and still has high density, excellent tensile strength and interlaminar shear strength.

Description

technical field [0001] The invention relates to the technical field of fiber-reinforced ceramic-based composite materials, in particular to a fiber-reinforced ceramic-based composite material and its preparation method and application. Background technique [0002] Fiber-reinforced ceramic matrix composites have excellent thermal and mechanical properties. The United States, Germany and other European and American countries have mastered the preparation technology of this type of composite material, and used this type of composite material in key parts such as aerospace engine combustion chambers, tail nozzle hot end parts, and aircraft thermal protection structural parts. However, in China, the development of this composite material technology is relatively slow, and a mature manufacturing process has not yet been formed, and there are even many technical details that have not yet been broken through. [0003] At present, the preparation process of fiber-reinforced ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/82C04B35/624C04B35/84C04B35/622C04B35/14C04B35/80C04B35/66F27D1/00
CPCC04B35/82C04B35/624C04B35/622C04B35/14C04B35/66F27D1/0009C04B2235/612C04B2235/616C04B2235/60C04B2235/77C04B2235/96
Inventor 孙志强张剑吕毅吴涛杨小波慈吉良
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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