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A kind of preparation method of nano-silicon carbide and hollow glass microspheres mixed reinforced porous aluminum matrix composite material

A technology of hollow glass microspheres and nano-silicon carbide, which is applied in the field of preparation of aluminum-based composite materials, can solve the problems of hollow glass microspheres such as low strength, low strength, and poor energy absorption effect, and achieve complete hole walls with less defects and high The effect of less porosity and impurities

Active Publication Date: 2022-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low strength of hollow glass microspheres and the low strength and poor energy absorption effect of porous aluminum-based composite materials prepared by using hollow glass microspheres, the present invention proposes a mixed reinforced porous aluminum composite material made of nano-silicon carbide and hollow glass microspheres. Preparation method of matrix composite material

Method used

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  • A kind of preparation method of nano-silicon carbide and hollow glass microspheres mixed reinforced porous aluminum matrix composite material
  • A kind of preparation method of nano-silicon carbide and hollow glass microspheres mixed reinforced porous aluminum matrix composite material

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specific Embodiment approach 1

[0032] Specific embodiment 1: The preparation method of the nano-silicon carbide and hollow glass microspheres mixed reinforced porous aluminum matrix composite material in this embodiment is carried out according to the following steps:

[0033] 1. Weighing

[0034] Weigh out 20%-65% hollow glass beads, 0.5%-2% silicon carbide reinforcement, 0.5%-48% aluminum metal powder and 30%-49% aluminum ingot by volume fraction;

[0035] The silicon carbide reinforcement is silicon carbide nanowires or silicon carbide whiskers;

[0036] The average particle size of the hollow glass microspheres is the same as the average particle size of the aluminum metal powder;

[0037] 2. Mixing

[0038] Mix the silicon carbide reinforcement and hollow glass microspheres weighed in step 1 in a solution and perform magnetic stirring, or mix the silicon carbide reinforcement and hollow glass microspheres for low-speed ball milling to obtain a composite powder, and then mix the composite powder. Dry...

specific Embodiment approach 2

[0048] Embodiment 2: The difference between this embodiment and Embodiment 1 is that: the average length of the silicon carbide nanowires in step 1 is 5-20 μm, and the average diameter is 20-50 nm; the average length of the silicon carbide whiskers is 5-50 nm. ~10 μm, with an average diameter of 50 to 100 nm.

specific Embodiment approach 3

[0049] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the average particle size of the hollow glass microspheres and the average particle size of the aluminum metal powder in step 1 are 20-80 μm, and the walls of the hollow glass microspheres are 20-80 μm. The thickness to radius ratio is 0.043 to 0.064.

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Abstract

A preparation method of nano-silicon carbide and hollow glass microbeads mixed and reinforced porous aluminum-based composite material relates to a preparation method of an aluminum-based composite material. In order to solve the problems of low strength of hollow glass microspheres, low strength and poor energy absorption effect of porous aluminum-based composite materials prepared by using hollow glass microspheres. Method: Weigh hollow glass microspheres, silicon carbide reinforcement, aluminum metal powder and aluminum ingot, mix silicon carbide reinforcement and hollow glass microspheres to obtain composite powder, and mix the dried composite powder with aluminum metal powder The mixed powder is obtained, and the mixed powder is filled into a graphite mold to obtain a preheated preform; molten aluminum metal is prepared; and finally, liquid aluminum is infiltrated. In the present invention, by mixing nano-silicon carbide and hollow glass microbeads, the silicon carbide reinforcement can be uniformly covered on the surface of the glass microbeads, and the two form a mechanical combination, which improves the bearing capacity of the hollow glass microbeads, and makes the composite material more high porosity.

Description

Technical field: [0001] The invention relates to a preparation method of an aluminum-based composite material Background technique: [0002] Metal foam is a kind of metal material with a large number of pore structures. It has large porosity, specific surface area, specific strength, specific stiffness, and good energy absorption, vibration and noise reduction, heat insulation and radiation shielding characteristics. , petrochemical, nuclear energy, construction, automobile and other industries have huge application prospects. [0003] As a representative of foam metal, aluminum foam is a new type of porous metal material with broad research space in recent years. Foamed aluminum is lightweight and has high specific strength, and can absorb energy under almost constant platform stress. sound needs in various industries. Aluminum foam has problems such as relatively complex preparation process, difficult cost control, and low mechanical properties. In order to solve this ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/12C22C49/06C22C49/14B22D23/04C22C101/14
CPCC22C1/08C22C47/12C22C49/06C22C49/14B22D23/04
Inventor 张强孙凯王智君修子扬姜龙涛陈国钦杨文澍武高辉
Owner HARBIN INST OF TECH