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Low pressure pressure preparation method of alumina ceramic fiber/particle reinforced metal matrix composites

A technology of alumina ceramics and composite materials, which is applied in the field of low-pressure pressurized preparation of alumina ceramic fiber/particle reinforced metal matrix composites, achieving high efficiency, low cost, and improved wear resistance

Active Publication Date: 2018-01-12
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the previous process method, the LPI method reduces the production cost, improves the efficiency, and solves the problem that the reinforced material is more easily and uniformly dispersed in the liquid alloy, and in the mixing of fibers and particles, the ceramic fibers present a three-dimensional distribution. Protects the shedding of ceramic particles

Method used

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  • Low pressure pressure preparation method of alumina ceramic fiber/particle reinforced metal matrix composites
  • Low pressure pressure preparation method of alumina ceramic fiber/particle reinforced metal matrix composites
  • Low pressure pressure preparation method of alumina ceramic fiber/particle reinforced metal matrix composites

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Experimental program
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Effect test

Embodiment 1

[0023] Al of this embodiment 2 O 3 The ceramic fiber / particle reinforced metal matrix composite material was prepared as follows: 2g of binder PEG was added to a beaker filled with 20ml of ethanol, and when the test tube size was 15mm in diameter to make a cylindrical material with a height of 1cm, more than 2g The amount of addition will cause volume expansion when the embryo body is formed. When the addition amount is less than 2g, the bonding effect cannot be achieved effectively.

[0024] After the complete dissolution, take the volume fraction of 12.5vol.% Al 2 O 3 Fiber, volume fraction 7.5vol.%Al 2 O 3 Particles, 0.8 g of Al particles were put into a beaker and stirred. Put the mixed sample into a test tube with a diameter of 15mm, compress both ends of the test tube, compress it into a cylinder with a height of 10mm, and put it into an electric furnace and heat it to 773K for 1 hour to make Al. 2 O 3 Ceramic body.

[0025] Al-based alloy is used as base materi...

Embodiment 2

[0028] The difference between this embodiment and Embodiment 1 is that the composition of the ceramic body is different, and this embodiment only uses Al 2 O 3 Fiber-reinforced metal matrix composites. Add 2g of adhesive PEG to the beaker containing 20ml of ethanol, and after it is completely dissolved, take the volume fraction of Al 2 O 3 Fiber 20vol.% is placed in a beaker and stirred. Put the mixed sample into a test tube with a diameter of 15mm, compress both ends of the test tube, compress it into a cylinder with a height of 10mm, and put it into an electric furnace and heat it to 773K for 1 hour to make a ceramic green body. Using Al-based alloy as the base material, the metal matrix composite material is made by compounding the ceramic body and the alloy through a high-frequency heater.

Embodiment 3

[0030] The difference between this embodiment and Embodiment 1 is that the composition of the ceramic body is different. In this embodiment, Al is used. 2 O 3 Particle Reinforced Metal Matrix Composites. Add 2g of adhesive PEG to a beaker containing 20ml of ethanol, and after it is completely dissolved, take a volume fraction of 20vol.% Al 2 O 3 The particles are placed in a beaker and stirred. Put the mixed sample into a test tube with a diameter of 15mm, compress both ends of the test tube, compress it into a cylinder with a height of 10mm, and put it into an electric furnace and heat it to 773K for 1 hour to make a ceramic green body. Using Al-based alloy as the base material, the metal matrix composite material is made by compounding the ceramic body and the alloy through a high-frequency heater.

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Abstract

The invention relates to a low-pressure infiltration preparation method of an Al2O3 ceramic fiber / particle reinforced metal-matrix composite. The Al2O3 ceramic fiber / particle reinforced metal-matrix composite is prepared with a low-pressure infiltration method, Al particles and a molten-state Al-based alloy are added and are mutually soluble, and compared with traditional solid phase method and liquid phase method, the low-pressure infiltration preparation method has the advantages of low cost, high efficiency and the like. Al2O3 fibers are three-dimensionally distributed in the composite, so that the Al2O3 particles can be kept steady and protected from falling off during frictional wear. By means of a reasonable ratio of the Al2O3 fibers to reinforced particles, the reinforced material is enabled to be distributed uniformly, and wear resistance of the material is improved. Compared with a conventional metal-matrix composite, the Al2O3 ceramic fiber / particle reinforced metal-matrix composite prepared with the method has better wear resistance and has broader application prospect.

Description

technical field [0001] The invention relates to the production of high wear-resistance alumina ceramic fiber / particle reinforced metal matrix composite material under low pressure Background technique [0002] In recent years, Metal Material Composite (MMC) has been widely used in locomotive, aviation and other fields because of its high specific strength, specific modulus and wear resistance. With the advent of metal matrix composites, various manufacturing processes such as high pressure pressure casting and powder metallurgy have been developed. However, these two methods have defects. In the powder metallurgy method, the size of the strengthening material plays a decisive factor on the mechanical properties of the sample. Therefore, this method is only suitable for using pure ceramic particles as the strengthening material. On the other hand, in the traditional high-pressure pressurization method, the liquid alloy is infiltrated into the embryo body made of ceramic fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/06C22C47/12C22C49/06C22C49/14C22C101/04
CPCC22C47/06C22C47/12C22C49/06C22C49/14
Inventor 王通
Owner DALIAN UNIV
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