Method for carrying out interface modification on alumina fiber three-dimensional fabric and modified alumina fiber three-dimensional fabric prepared by same

A technology of alumina fiber and three-dimensional fabric, which is applied in fiber processing, textile material processing, physical processing, etc., can solve the problems of short cost cycle and achieve the effects of low cost, high strength retention rate, and mild reaction conditions

Active Publication Date: 2020-04-14
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing alumina fabric fiber interface modification methods, and provide a relatively simple, low-cost, and short-cycle process for interface modification of fibers in alumina fiber three-dimensional fabrics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for carrying out interface modification on alumina fiber three-dimensional fabric and modified alumina fiber three-dimensional fabric prepared by same
  • Method for carrying out interface modification on alumina fiber three-dimensional fabric and modified alumina fiber three-dimensional fabric prepared by same

Examples

Experimental program
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Effect test

Embodiment 1

[0067] ①Treat the alumina fiber three-way orthogonal fabric at 500°C for 1 hour in an air atmosphere, and then place it in a vacuum container with a glue inlet. Inject into a vacuum container to completely soak the alumina fiber three-way orthogonal fabric. After standing at room temperature for 10 hours, take out the fabric, wash it once with distilled water, and dry it in an oven at 100°C for 1 hour to obtain polyanionic polymer pretreated alumina. Fiber three-way orthogonal fabric.

[0068] ②Dissolve lanthanum nitrate hexahydrate and EDTA in water at 1°C, adjust the pH value of the solution to 5 with concentrated ammonia water, prepare the final concentration of lanthanum ions in the solution to be 0.4M (0.4mol / L), and the final concentration of EDTA to be 0.8M (0.8mol / L), the final temperature of the solution is maintained at about 1°C to obtain a lanthanum ion solution; dissolve concentrated phosphoric acid in water at 1°C, adjust the pH value of the solution to 5 with co...

Embodiment 2

[0075] ① Treat the alumina fiber stitched fabric at 500°C for 1 hour in an air atmosphere, then place it in a vacuum container with a glue inlet, and inject a polyacrylic acid solution with a mass fraction of 5 wt% and a pH of 5 into the vacuum container under vacuum conditions In the process, the alumina fiber seamed fabric was completely soaked, and after standing at room temperature for 10 hours, the fabric was taken out, washed once with distilled water, and dried in an oven at 100°C for 1 hour to obtain a polyanionic polymer pretreated alumina fiber seamed fabric.

[0076] ② Dissolve lanthanum nitrate hexahydrate and EDTA in water at 1°C, adjust the pH value of the solution to 5 with concentrated ammonia water, prepare the final concentration of lanthanum ions in the solution to 0.4M, the final concentration of EDTA to 0.8M, and the final temperature of the solution Keep it at about 1°C to obtain a lanthanum ion solution; dissolve concentrated phosphoric acid in water at 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a method for carrying out interface modification on an alumina fiber three-dimensional fabric and a modified alumina fiber three-dimensional fabric prepared by the same. The method comprises the steps of: carrying out preprocessing on the alumina fiber three-dimensional fabric by adopting polyanion polymer solution to obtain a preprocessed alumina fiber three-dimensional fabric; preparing lanthanum phosphate precursor solution of which a temperature is not higher than 5 DEG C; under the conditions of vacuum and a temperature which is not higher than 10 DEG C, carryingout vacuum impregnation on the preprocessed alumina fiber three-dimensional fabric by adopting the lanthanum phosphate precursor solution; and carrying out microwave heating processing on the aluminafiber three-dimensional fabric subjected to vacuum impregnation, and then sequentially carrying out steps of cleaning, drying and high-temperature processing so as to complete interface modification on the alumina fiber three-dimensional fabric. The method is simple in process, does not require complex equipment and regents, and is high in utilization rate of a raw material and low in cost; and analumina fiber reinforced aluminum oxide composite material prepared by adopting the fiber three-dimensional fabric modified by the process disclosed by the invention still has high strength after long-time high-temperature processing.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a method for modifying the interface of an alumina fiber three-dimensional fabric and a modified alumina fiber three-dimensional fabric prepared therefrom. Background technique [0002] Hot-end components such as aero-engine combustors, hypersonic aircraft front fuselage leading edge and side strip wings have put forward an urgent demand for high-temperature, high-strength, high-oxidation-resistant materials. In the existing high-temperature-resistant ceramic material system, homogeneous ceramic materials are difficult to meet the requirements of reusability of hot-end parts at high temperatures due to insufficient toughness and poor thermal shock resistance. Because the reinforcement and toughening effect of fibers can greatly improve the toughness of materials, fiber-reinforced ceramic matrix composites are the preferred materials for internal thermal st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/263D06M15/356D06M11/71D06M10/00D06B3/10D06B15/00
CPCD06M15/263D06M15/3564D06M11/71D06M10/00D06B3/10D06B15/00
Inventor 吴焘孙志强慈吉良张剑吕毅赵英民张天翔张昊
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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