Preparation method of ZrO2-based composite material resistant to high temperature

A composite material and high-temperature-resistant technology, which is applied in the field of ZrO2-based high-temperature-resistant composite materials prepared by the impregnation and cracking process of precursors, can solve the problems of low cracking efficiency, long cycle, easy cracking, etc., and achieve mature preparation technology, high production efficiency, and reliability sex high effect

Inactive Publication Date: 2018-12-21
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to utilize ZrO 2 Precursor impregnation-high temperature cracking and other characteristics, overcome the existing ZrO 2 Due to the shortcomings of the existing preparation methods of matrix composites, such as long cycle, easy cracking, and low cracking efficiency, a ZrO based on the precursor impregnation cracking process (PIP method) was proposed. 2 The preparation method of matrix composite material, this method formula is simple, raw material is easy to obtain, easy to use, is suitable for industrialized production

Method used

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  • Preparation method of ZrO2-based composite material resistant to high temperature
  • Preparation method of ZrO2-based composite material resistant to high temperature
  • Preparation method of ZrO2-based composite material resistant to high temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0034] a ZrO 2 Matrix composite materials, the preparation method of which is as follows figure 1 shown, including the following steps:

[0035](1) Spread 30 layers of carbon fiber cloth with a thickness of 0.10mm, and then suture. The fiber used for suture is commercially available T800 carbon fiber. The T800 carbon fiber is more flexible and not easy to break. In order to obtain better mechanical properties, Design the distance between every two sutures to be 5mm;

[0036] (2) Clamp the fiber cloth obtained in step (1) with a graphite mold, place it in a vacuum container, and vacuum ZrO 2 Precursor, impregnated for 6h;

[0037] (3) Dry at room temperature for 2 hours, dry at 200°C and cool to room temperature naturally;

[0038] (4) Arranging the fibers treated in step (3) in a pyrolysis chamber for pyrolysis, the heat treatment temperature is 1000° C., and the treatment time is 1 h to cool to room temperature;

[0039] (5) After repeating step (2) to step (4) 15 times ...

Embodiment 2

[0043] a ZrO 2 Matrix composite materials, the preparation method of which is as follows figure 1 shown, including the following steps:

[0044] (1) Lay one layer of alumina fiber 2.5D woven piece, and then perform puncture treatment. The fiber used for acupuncture is 750Tex alumina fiber, and the distance between each two needle-punched lines is 8mm;

[0045] (2) Clamp the punctured alumina fiber 2.5D woven piece obtained in step (1) with a graphite mold, place it in a vacuum container, and vacuum ZrO 2 Precursor, after soaking for 4 hours, take it out and dry it;

[0046] (3) Low-temperature drying at a temperature of 150° C. for 4 hours;

[0047] (4) Place the alumina fiber 2.5D woven piece treated in step (3) in a pyrolysis chamber for pyrolysis, the pyrolysis temperature is 1200°C, the treatment time is 40min, and then cooled to room temperature;

[0048] (5) Repeat steps (2)-(4) in sequence for 10 times, and then perform mechanical processing to achieve the required ...

Embodiment 3

[0054] a ZrO 2 Matrix composite materials, the preparation method of which is as follows figure 1 shown, including the following steps:

[0055] (1) Lay 3 layers of silicon carbide fiber cloth with a thickness of 0.9 mm, and then perform puncture treatment to form a "skin" of silicon carbide fiber cloth. The fiber used for acupuncture is 600Tex silicon carbide ceramic fiber. Every two needles Line spacing is 5mm;

[0056] (2) Clamp the silicon carbide fiber cloth "skin" obtained in step (1) with a graphite mold, place it in a vacuum container, and vacuum ZrO 2 Precursor, and then dried at a temperature of 100°C;

[0057] (3) Place the silicon carbide fiber cloth "skin" treated in step (2) in a high temperature furnace for cracking, the temperature is 1200°C, and the treatment time is 30 minutes to cool to room temperature;

[0058] (4) After repeating steps (2)-(3) in sequence for 12 times, mechanical processing is carried out to achieve the required size.

[0059] The re...

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Abstract

The invention provides a method for preparing a ZrO2-based composite material resistant to high temperature. The method comprises the following steps: a) inorganic fiber cloth or thin fabric which isresistant to high temperature is tightly clamped by a graphite mould and positioned in a vacuum container which is then vacuumed, and a ZrO2 precursor is absorbed for overall impregnation; b) after overall impregnation, the inorganic fiber cloth or thin fabric which is resistant to high temperature is transferred and dried at room temperature; c) after dried, the inorganic fiber cloth or thin fabric which is resistant to high temperature is transferred to a drying oven for heat treatment and then naturally cooled to room temperature for solidification; d) after the heat treatment, the inorganic fiber cloth or thin fabric which is resistant to high temperature is put into a high temperature cracking furnace for pyrolyzing at high temperature and then cooled to room temperature; and e) the processes a)-d) are repeated by circulating in turn for 10-15 times, thereby obtaining the ZrO2-basedcomposite material. The ZrO2-based composite material provided by the invention has the performancesof being high in density, high in temperature resistance, strong in bearing capacity, and the like, and has the advantages of being easy to obtain raw materials, mature in preparation process and suitable for large-scale industrial production.

Description

technical field [0001] The present invention generally relates to ZrO 2 The technical field of preparation of high-temperature-resistant composite materials, specifically relates to the preparation of ZrO by a precursor dipping and cracking process 2 A method based on high temperature resistant composite materials. Background technique [0002] Continuous oxide fiber-reinforced oxide (Oxide / Oxide) CMCs has high specific strength and high specific modulus, which can effectively overcome the sensitivity to cracks and thermal shocks, and does not have oxidation problems. It is an important research topic for high-temperature structural materials. direction. In addition, Oxide / Oxide composites have excellent dielectric properties and have broad application prospects in the field of high-temperature wave-transmitting and absorbing materials. [0003] Due to the strong background of military applications, there are few reports on the molding process and related properties of ke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/80C04B35/622C04B35/84
CPCC04B35/803C04B35/48C04B35/622C04B2235/5224C04B2235/5244C04B2235/5248C04B2235/77C04B2235/96C04B2235/9607
Inventor 向阳曹峰彭志航
Owner NAT UNIV OF DEFENSE TECH
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