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A kind of preparation method of carbon fiber powder reinforced molybdenum disilicide-based composite material

A technology of molybdenum disilicide and composite materials, which is applied in the field of preparation of molybdenum disilicide-based composite materials, can solve problems such as changing mechanical properties, and achieve the effects of improving electrical conductivity, toughness and bending strength, and simple process

Active Publication Date: 2020-09-25
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, it is used to replace Mo atoms. Due to the difference in atomic number and atomic size, the strength of the bond between them changes, which can change its mechanical properties. In general research, it is hoped to increase the toughness of the material, but for improving the disilicide Molybdenum strength has been less studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a carbon fiber powder reinforced molybdenum disilicide-based composite material, the steps are as follows:

[0022] (1) Disperse the liquid phenolic resin (50 wt% solid content) in absolute ethanol to ensure that the liquid phenolic resin content in the dispersion is 8 wt%;

[0023] (2) Press MoSi 2 The mass ratio of powder (average diameter 5 μm) to absolute ethanol is 1:1, MoSi 2 Add the powder to the solution obtained in step (1), heat and stir at 50 °C to make it even;

[0024] (3) By carbon fiber powder (length 45 μm) and MoSi 2 The mass ratio of the powder is 0.15:1. Add the carbon fiber powder into the solution obtained in step (2), and continue stirring at 70°C until the slurry becomes too thick to stir;

[0025] (4) Put the slurry in a drying oven and dry it at 70 °C; after granulating through a 60-mesh sieve, put the powder in a mold and press it at 200 MPa to obtain a green body;

[0026] (5) Cover the green body with a mixture of s...

Embodiment 2

[0029] A method for preparing a carbon fiber powder reinforced molybdenum disilicide-based composite material, the steps are as follows:

[0030] (1) Disperse the liquid phenolic resin (50 wt% solid content) in absolute ethanol to ensure that the liquid phenolic resin content in the dispersion is 6 wt%;

[0031] (2) Press MoSi 2 The mass ratio of powder (average diameter 5 μm) to absolute ethanol is 0.5:1, MoSi 2 Add powder to the solution obtained in step (1), heat and stir at 40 °C to make it even;

[0032] (3) By carbon fiber powder (30 μm in length) and MoSi 2 The mass ratio of the powder is 0.1:1. Add the carbon fiber powder into the solution obtained in step (2), and continue stirring at 60°C until the slurry becomes too thick to stir;

[0033] (4) Put the slurry in a drying oven and dry at 60°C; after granulating through an 80-mesh sieve, put the powder in a mold and press it at 250 MPa to obtain a green body;

[0034] (5) Coat the green body with a mixture of silic...

Embodiment 3

[0037] A method for preparing a carbon fiber powder reinforced molybdenum disilicide-based composite material, the steps are as follows:

[0038] (1) Disperse the liquid phenolic resin (50 wt% solid content) in absolute ethanol to ensure that the liquid phenolic resin content in the dispersion is 10 wt%;

[0039] (2) Press MoSi 2 The mass ratio of powder (average diameter 5 μm) to absolute ethanol is 1.2:1, MoSi 2 Add powder to the solution obtained in step (1), heat and stir at 60°C;

[0040] (3) By carbon fiber powder (50 μm in length) and MoSi 2 The mass ratio of the powder is 0.2:1. Add the carbon fiber powder into the solution obtained in step (2), and continue stirring at 80°C until the slurry becomes too thick to stir;

[0041] (4) Place the slurry in a drying oven and dry at 80°C; after granulating through a 100-mesh sieve, put the powder in a mold and press it at 150 MPa to obtain a green body;

[0042] (5) Coat the green body with a mixture of silicon powder and ...

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Abstract

Belonging to the field of preparation of molybdenum disilicide based composite materials, the invention discloses a preparation method of a carbon fiber powder reinforced molybdenum disilicide based composite material. The method includes: dispersing liquid phenolic resin in anhydrous ethanol; adding MoSi2 powder into the obtained solution and stirring the substances evenly at 40-60DEG C; adding carbon fiber powder into the obtained solution, further performing stirring at 60-80DEG C until the slurry is thick and cannot be stirred; drying the slurry, conducting granulation and sieving, puttingthe obtained particle powder in a die, and carrying out compression moulding to obtain a blank; coating the blank with mixed powder of silicon powder and titanium powder, and placing the coated blankin a graphite crucible, and carrying out reaction at 1550-1650DEG C for 1-3h in vacuum, thus obtaining the carbon fiber reinforced molybdenum disilicide based composite material. The method providedby the invention has the advantages of simple process, convenient operation and the like, C / MoSi2 has the advantages of carbon fiber and molybdenum disilicide simultaneously, and overcomes the defectsof large brittleness and the like of MoSi2.

Description

technical field [0001] The invention belongs to the field of preparation of molybdenum disilicide-based composite materials, and in particular relates to a preparation method of carbon fiber powder reinforced molybdenum disilicide-based composite materials. Background technique [0002] Carbon fiber has a series of excellent properties such as low density, high specific strength, high specific modulus, and high temperature resistance. One of its important applications is as a reinforcement for composite materials to carry loads. Molybdenum disilicide (MoSi 2 ) as an intermetallic compound also has excellent performance, with high melting point, moderate density, good electrical and thermal conductivity, and is a high-temperature structural material with high application value, widely used in aerospace, transportation, chemical industry , mechanical transportation and other directions. But MoSi 2 It has obvious brittle-ductile transition characteristics, and its transition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/58C04B35/622
Inventor 孙卫康董会娜张东生姚栋嘉牛利伟吴恒刘喜宗
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD