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A kind of short fiber reinforced oriented max phase ceramic matrix composite material and preparation method

A technology of short fiber reinforcement and composite materials, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science. It can solve the problems of high reaction synthesis temperature, low strength, and performance degradation, and reduce the sintering reaction. The effect of good adaptability to temperature and technology and low equipment requirements

Active Publication Date: 2021-07-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a short fiber reinforced orientation MAX phase ceramic matrix composite material and its preparation method, to solve the problem that the reaction synthesis temperature of the ceramic matrix composite material prepared by the existing method for preparing the fiber MAX phase composite material is very high, and the MAX phase of the reaction synthesis The crystal grains of the matrix material are very coarse, the internal defects are many, the strength is low, and the fracture toughness is poor; and the reaction sintering temperature is too high, and the chemical and physical loss of the fiber in the matrix leads to performance degradation and other problems.

Method used

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  • A kind of short fiber reinforced oriented max phase ceramic matrix composite material and preparation method
  • A kind of short fiber reinforced oriented max phase ceramic matrix composite material and preparation method
  • A kind of short fiber reinforced oriented max phase ceramic matrix composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, the preparation method of the short fiber reinforced oriented MAX phase ceramic matrix composite material is as follows:

[0049] Weigh 200 grams of product name Ti 2 The nano MAX phase ceramic lamellar powder of AlC has a particle size of 180 nanometers and an oxygen content of 8% by mass. weigh figure 1 40 grams of the shown alumina fiber raw cotton, the fiber raw cotton is pretreated to obtain figure 2 Shown are short fibers with a fiber diameter of 3-10 microns and a fiber length of about 50-200 microns. Directly put the nanosheet powder and short fibers into a 1L beaker, add 200 grams of absolute ethanol for electric mechanical stirring, and the stirring blade speed is 200 rpm. After stirring for 1 hour, the slurry was taken out and dried. After the slurry is completely dried, put the obtained mixture into the mixer, and add a small amount of polyurethane-coated iron core balls with a diameter of 10 mm for mixing. The circular motion speed of ...

Embodiment 2

[0055] In this example, the preparation method of the short fiber reinforced oriented MAX phase ceramic matrix composite material is as follows:

[0056] Weigh 200 grams of product name Ti 3 SiC 2 The nanometer MAX phase ceramic sheet powder, the particle size of the powder is 220 nanometers, and the mass fraction of oxygen content in the powder is 0.0002%. Weigh 50 grams of chopped silicon carbide fibers with a diameter of 100-200 microns and a fiber length of about 3-5 mm, and add 30 grams of SiC particles with a particle size of 50 nanometers as an additive. Directly put the nanosheet powder, short fibers and SiC particles into the mixer, and add a small amount of polyurethane-coated iron core balls with a diameter of 10 mm for mixing. The circular motion speed of the mixing tank is 60 rpm, and the mixing time is After 4 hours, argon protection was introduced into the mixing tank. After the mixing is completed, in the vacuum glove box, the polyurethane iron core balls ar...

Embodiment 3

[0059] In this example, the preparation method of the short fiber reinforced oriented MAX phase ceramic matrix composite material is as follows:

[0060] Weigh 200 grams of product name Ti 3 AlC 2The nanometer MAX phase ceramic sheet powder, the particle size of the powder is 200 nanometers, and the mass fraction of oxygen content in the powder is 0.0002%. Weigh 50 grams of chopped C fibers with a diameter of 20-50 microns and a fiber length of about 3-5 mm, and add 10 grams of polyethylene particles with a particle size of 50 nanometers as a reaction additive. Directly put the nanosheet powder, short fiber and polyethylene into the mixer, and add a small amount of polyurethane-coated iron core balls with a diameter of 10 mm for mixing. The circular motion speed of the mixing tank is 30 rpm, and the mixing time is After 12 hours, argon protection was introduced into the mixing tank. After the mixing is completed, in the vacuum glove box, the polyurethane iron core balls are...

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Abstract

The invention relates to the field of MAX-phase ceramic-based composite materials, in particular to a short-fiber-reinforced and oriented MAX-phase ceramic-based composite material and a preparation method thereof. A new process of preparing fiber-reinforced MAX phase ceramic matrix composites with fibers, nanosheet layered MAX phase ceramic powder, and other additives is used to prepare a matrix composed of highly oriented lamellar MAX phase ceramics, and the fibers are parallel to the axial direction. A new ternary composite material in which the layered MAX phase ceramics are distributed, and the granular ceramic phase reinforcement phase is dispersed in the matrix. Therefore, the MAX phase ceramic matrix composite material matrix material prepared by the existing method has coarse grains, many internal defects, low strength, and poor fracture toughness; and the reaction sintering temperature is too high, and the chemical and physical damage of the fiber in the substrate causes performance degradation etc. The fiber prepared by the method is suitable for large-scale industrial preparation, and its performance far exceeds any existing known fiber MAX phase composite material.

Description

technical field [0001] The invention relates to the field of MAX-phase ceramic-based composite materials, in particular to a short-fiber-reinforced and oriented MAX-phase ceramic-based composite material and a preparation method thereof. Background technique [0002] MAX phase material (such as: Ti 3 SiC 2 、Ti 2 AlC, Nb 2 AlC, etc.) as a ceramic material room temperature fracture toughness up to 6 ~ 8MPa.m 1 / 2 At the same time, it has the characteristics of high structural strength, oxidation resistance, thermal corrosion resistance, radiation resistance, damage self-healing, etc., and the maximum service temperature of some types reaches 1700 °C. However, its strength and hardness are much lower than that of Al 2 o 3 , TZP, YAG and other traditional ceramics, room temperature brittleness and reliability are lower than traditional metal materials. In order to improve its strength, hardness, and toughness, the second phase particles (such as: SiC, Al 2 o 3 、Ti 5 Si ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/56C04B35/622C04B35/645
CPCC04B35/5618C04B35/622C04B35/645C04B2235/6562C04B2235/6567C04B2235/96B82Y30/00B82Y40/00C04B2235/667C04B35/80C04B2235/5276C04B2235/5248C04B2235/5244C04B35/82C04B2235/5216C04B2235/5224C04B2235/526C04B2235/5264C04B2235/422C04B2235/48C04B2235/3826C04B2235/3217C04B2235/3865C04B2235/3843C04B2235/5445C04B2235/5454C04B2235/668C04B35/6455C04B2235/666C04B2235/3817C04B2235/3895C04B35/62635C04B2235/787C04B2235/788C04B2235/786C04B2235/785C04B35/5615C04B35/64
Inventor 贾清谢曦柏春光崔玉友杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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