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Silicon carbide fiber and medium-high entropy ceramic reinforced metal matrix composite material and preparation method thereof

A technology of silicon carbide fiber and composite materials, which is applied in the field of fiber and ceramic particle reinforced metal matrix composite materials, can solve the problems of poor product strength, reduced service performance, shortened service life, etc., and achieve extended service life, high tensile strength, The effect of low thermal conductivity

Active Publication Date: 2022-06-03
QIANWAN INST OF CNITECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional particle reinforcement method has many deficiencies. One of its commonly used preparation methods is powder metallurgy. Reinforcement requires strict control over the properties of the fibers

Method used

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  • Silicon carbide fiber and medium-high entropy ceramic reinforced metal matrix composite material and preparation method thereof
  • Silicon carbide fiber and medium-high entropy ceramic reinforced metal matrix composite material and preparation method thereof
  • Silicon carbide fiber and medium-high entropy ceramic reinforced metal matrix composite material and preparation method thereof

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preparation example Construction

[0036] As another aspect of the technical solution of the present invention, it also relates to a preparation method of a silicon carbide fiber and a medium and high entropy ceramic reinforced metal matrix composite material, comprising:

[0037] Mixing silicon carbide fiber, medium and high entropy rare earth boron carbon compound material and metal or alloy material uniformly to obtain a mixture;

[0038] The mixture is heat treated to prepare the silicon carbide fiber and the medium and high entropy ceramic reinforced metal matrix composite material.

[0039] In some preferred embodiments, the preparation method specifically includes:

[0040] Prepare an interface layer on the surface of the silicon carbide fiber to obtain a silicon carbide fiber with an interface layer;

[0041] Mixing the silicon carbide fiber with the interface layer, the medium and high entropy rare earth boron carbon compound material and the metal or alloy material uniformly to obtain a mixture;

[...

Embodiment 1

[0056] In this embodiment, the metal matrix composite material is a silicon carbide fiber reinforced aluminum metal matrix composite material as an example, and the ceramic particle reinforcement is (Y 0.2 La 0.2 Pr 0.2 Sm 0.2 Lu 0.2 )B 2 C 2 , the specific preparation steps are as follows:

[0057] (1) Grind silicon carbide fibers and control their volume fraction to 40%; regrind (Y 0.2 La 0.2 Pr 0.2 Sm 0.2 Lu0.2 )B 2 C 2 Particles, the particle size is controlled at 2μm, and the volume fraction is controlled at 10%;

[0058] (2) Using a high-energy ball mill to grind the aluminum powder and the above-mentioned ground silicon carbide fibers and (Y) 0.2 La 0.2 Pr 0.2 Sm 0.2 Lu 0.2 )B 2 C 2 The particles are mixed evenly, the rotation speed is 150r / min, and the duration is 3h;

[0059] (3) The final product is prepared by the hot pressing sintering method, and the reinforcing phase is obtained after sintering at a high temperature of 1000 ° C for 10 hours, wh...

Embodiment 2

[0061] In this embodiment, the metal matrix composite material is a silicon carbide fiber reinforced titanium metal matrix composite material as an example, and the ceramic particle reinforcement is (Pr 0.2 Eu 0.2 Ho 0.2 Pm 0.2 Lu 0.2 )B 2 C 2 , the specific preparation steps are as follows:

[0062] (1) Grind silicon carbide fibers and control their volume fraction to 10%; regrind (Pr 0.2 Eu 0.2 Ho 0.2 Pm 0.2 Lu 0.2 )B 2 C 2 Particles, the particle size is controlled at 5μm, and the volume fraction is controlled at 15%;

[0063] (2) Using a high-energy ball mill to grind the titanium powder and the above ground silicon carbide fibers and (Pr 0.2 Eu 0.2 Ho 0.2 Pm 0.2 Lu 0.2 )B 2 C 2 The particles are mixed evenly, the rotation speed is 200r / min, and the duration is 4h;

[0064] (3) The final product is prepared by hot pressing sintering method, and the reinforcing phase is obtained after sintering at 1500 ℃ for 8 hours and the reinforcing phase is silicon c...

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Abstract

The invention discloses a silicon carbide fiber and medium-high entropy ceramic reinforced metal matrix composite material and a preparation method thereof. The composite material comprises a metal matrix and a reinforcement phase, the reinforcement phase comprises silicon carbide fibers and a medium-high entropy rare earth boron carbon compound, and the rare earth boron carbon compound is RExByCz ceramic particles. According to the invention, the medium-high entropy rare earth boron carbon compound and the silicon carbide fiber are jointly used as a reinforcement phase of the metal matrix composite material, the RExByCz ceramic has a unique nano layered structure and excellent mechanical properties, and the silicon carbide fiber has excellent characteristics of high temperature resistance, oxidation resistance, radiation resistance, wear resistance and the like; the mechanical property, the high-temperature oxidation resistance, the radiation resistance and the like of the composite material can be further improved, and the composite material can be applied to the fields of aerospace, nuclear energy, electromagnetic wave stealth and the like.

Description

technical field [0001] The invention relates to the technical field of fiber and ceramic particle reinforced metal matrix composite materials, in particular to a new type of silicon carbide fiber and medium and high entropy RE x B y C z Metal matrix composites reinforced by ceramic particles synergistically, and preparation methods and applications thereof. Background technique [0002] The current research on metal matrix composites focuses on the preparation, microstructure and final product properties of composite materials, mainly starting from the composition of fiber or particle reinforcement phase and the selection of metal matrix, and then by constantly trying to replace the interface layer, fiber And the ratio of particle size and composition to gradually enhance the properties of the material, and at the same time, a variety of preparation methods are selected, and various fine-tuning are performed on the preparation path to control the properties of the product....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/14C22C47/14C22C49/02C22C49/06C22C49/08C22C49/11C22C49/10C22C101/14
CPCC22C49/14C22C47/14C22C49/02C22C49/06C22C49/08C22C49/11C22C49/10Y02E30/30
Inventor 周小兵秦刚蒋龙飞黄庆
Owner QIANWAN INST OF CNITECH
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