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A high-temperature-resistant high-strength alumina fiber-reinforced composite material and its preparation method

A reinforced composite material and alumina fiber technology, which is applied in the field of high-temperature-resistant and high-strength alumina fiber-reinforced composite materials and its preparation, can solve the problems that the preparation method has not been reported in detail, and achieve excellent room temperature and high temperature mechanical properties and excellent comprehensive performance. performance, retention-enhancing effects

Active Publication Date: 2020-02-14
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Alumina fiber composite materials began to attract more attention after the above-mentioned application bottlenecks were highlighted. Alumina fiber composite materials mainly use alumina fibers (that is, fibers containing alumina as the main component) as reinforcing fibers, but currently for The composition and preparation methods of continuous alumina fiber reinforced oxide composites have not been reported in detail

Method used

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  • A high-temperature-resistant high-strength alumina fiber-reinforced composite material and its preparation method
  • A high-temperature-resistant high-strength alumina fiber-reinforced composite material and its preparation method

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preparation example Construction

[0038] The preparation method of the high-temperature-resistant high-strength alumina fiber-reinforced composite material of the present invention specifically comprises the following steps:

[0039] Step (1) The continuous alumina fiber prefabricated body stitched or woven by two-dimensional cloth layer, 2.5D or orthogonal three-way method is used as the reinforcement body, and the volume content of the fiber reinforcement body is 30-60%.

[0040] In step (2), put the alumina fiber prefabricated body prepared in step (1) into a muffle furnace for purification and heat treatment. The heat treatment temperature is 380-750° C. and the heat treatment time is 0.5-8 hours.

[0041] Step (3), after mixing nano-alumina powder and deionized water with a mass ratio of 30:100 to 1.5:100, add 0.05 to 6.0% dispersant, the dispersant is CELUNA D-305 (Zhongjing Oil Co., Ltd.), BYK-154 (ByK Chemicals) or BYK-191 (ByK Chemicals), ultrasonic 10 ~ 120min, until the formation of a uniform disper...

Embodiment 1

[0051] (1), with 2.5D continuous alumina fiber prefabricated body as reinforcement, the volume content of fiber is 42%;

[0052] (2), put the alumina fiber prefabricated body prepared in step (1) into a muffle furnace for purification heat treatment, the heat treatment temperature is 700°C, and the heat treatment time is 5h;

[0053] (3), after mixing nano-alumina powder and deionized water with a mass ratio of 28:100, add 3.5% dispersant CELUNA D-305, ultrasonic 100min, to form a uniform dispersion; 40% nano-silica sol and nano-alumina powder suspension are mixed according to the mass ratio of 1:1.5, and placed in a ball mill. The speed of the ball mill is 800r / min, and the ball milling time is 100min. 120mPa s;

[0054] (4), place the alumina fiber prefabricated body obtained in step (2) in the "dual nanocomposite impregnation solution" obtained in step (3), vacuum impregnate for 120min, and the vacuum degree is 133Pa, then carry out pressure impregnation, and the impregnat...

Embodiment 2

[0062] (1), the continuous alumina fiber prefabricated body of the two-dimensional cloth layer is used as the reinforcement, and the volume content of the fiber is 38%;

[0063] (2) Put the alumina fiber prefabricated body prepared in step (1) into a muffle furnace for purification heat treatment, the heat treatment temperature is 400°C, and the heat treatment time is 3h;

[0064] (3) After mixing nano-alumina powder and deionized water at a mass ratio of 15:100, add 2.0% dispersant CELUNA D-305, and ultrasonicate for 60 minutes to form a uniform dispersion; 40% nano-silica sol and nano-alumina powder suspension are mixed according to the mass ratio of 1:1, and placed in a ball mill. The speed of the ball mill is 600r / min, and the ball milling time is 60min. 50mPa·s;

[0065] (4), place the alumina fiber prefabricated body obtained in step (2) in the "dual nanocomposite impregnation solution" obtained in step (3), vacuum impregnate for 1h, and the vacuum degree is 100Pa, then...

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Abstract

The invention relates to a high-temperature-resistant high-strength aluminum oxide fiber enhanced composite material and a preparation method thereof. The preparation method comprises the following steps of: by taking a two-dimensional cloth paving layer and 2.5D woven or orthogonally three-dimensional woven continuous aluminum oxide fiber preform as an enhancer, preparing a matrix through a double nano composite impregnation liquid where silicon dioxide and aluminum oxide are uniformly mixed; and finally obtaining the aluminum oxide fiber enhanced composite material through the process of vacuum pressure impregnation, micro-positive pressure medium and low temperature pre-curing, micro-positive pressure curing and atmosphere temperature programming sub-sectional thermal treatment, wherein the mass ratio of silicon dioxide to aluminum oxide in the composite material is (19:1)-(12:8), and the volume content of the aluminum oxide fibers is 30-60%. The prepared composite material has a high-temperature-resistant property and a high-temperature mechanical property, and is high in compactness; the room temperature tensile strength of the material reaches 310+ / -30MPa, the tensile strength at 1100 DEG C reaches 135+ / -20MPa, and the tensile strength at 1200 DEG C reaches 90+ / -10MPa; and compared with a similar quartz fiber enhanced silicon dioxide oxide / oxide composite material, the performance is improved by 4-5 times.

Description

technical field [0001] The invention relates to a high-temperature-resistant high-strength alumina fiber-reinforced composite material and a preparation method thereof, belonging to the field of ceramic-based composite material production. Background technique [0002] With the rapid development of my country's aerospace industry and the upgrading of weapons and equipment, higher requirements for light weight, high strength and toughness, high reliability, and improved temperature resistance are put forward for the material system. Continuous fiber reinforced ceramic matrix composites Compared with traditional materials, advanced composite materials can achieve 30% to 50% weight reduction, and have comparable strength, good reliability, and excellent high temperature resistance, so they are receiving more and more attention. At this stage, advanced composite materials have not only become the mainstream material solution for advanced aircraft design, but have been more and mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/80C04B35/622C04B35/64
CPCC04B35/14C04B35/622C04B35/64C04B2235/96C04B2235/9607C04B2235/5454C04B2235/5256C04B2235/5224C04B2235/661C04B2235/6567C04B2235/658C04B2235/6562C04B2235/616C04B2235/3217
Inventor 孙妮娟王驰张娟张大海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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