Preparation method of nano silicon carbide and hollow glass bead mixed reinforced porous aluminum-based 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 low strength, low strength of hollow glass microspheres, and poor energy absorption effect, and achieve high porosity and complete pore walls The effect of fewer defects and fewer impurities

Active Publication Date: 2022-03-25
HARBIN INST OF TECH
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  • 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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  • Preparation method of nano silicon carbide and hollow glass bead mixed reinforced porous aluminum-based composite material
  • Preparation method of nano silicon carbide and hollow glass bead mixed reinforced porous aluminum-based composite material

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specific Embodiment approach 1

[0032] DETAILED DESCRIPTION OF THE INVENTION First: The preparation method of nano silicon carbide and hollow glass bead mixed enhancing porous aluminum-based composites is carried out in the following steps:

[0033] First, weigh

[0034] According to the volume fraction, 20% to 65% of the hollow glass microbead, 0.5% ~ 2% silicon carbide reinforcement, 0.5% ~ 48% aluminum powder and 30% to 49% aluminum ingot;

[0035] The silicon carbide reinforcement is a silicon carbide nanowire or a silicon carbide whisker;

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

[0037] Second, mixed

[0038] The silicon carbide reinforcement of the step is mixed with the hollow glass microbeam and mix magnetic stirring in a solution, or mix the silicon carbide reinforcement with the hollow glass microbeads to mix the low speed ball mill, to obtain a composite powder, then the composite powder Dry, mixed the dry c...

specific Embodiment approach 2

[0048] DETAILED DESCRIPTION OF THE INVENTION 2: The present embodiment is different from that of the particular embodiment: the average length of the silicon carbide nanowire is 5 to 20 μm, the average diameter is 20 ~ 50 nm; the silicon carbide is average average length of 5 ~ 10 μm, the average diameter is 50 to 100 nm.

specific Embodiment approach 3

[0049] DETAILED DESCRIPTION OF THE INVENTION 3: The present embodiment and the specific embodiment of the present embodiment are different: the average particle size of the hollow glass microbead and the average particle diameter of the aluminum metal powder is 20 to 80 μm, the wall of the hollow glass microbead The thickness and radius ratio is 0.043 to 0.064.

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Abstract

The invention discloses a preparation method of a nano silicon carbide and hollow glass bead mixed reinforced porous aluminum-based composite material, and relates to a preparation method of an aluminum-based composite material. The problems that hollow glass beads are low in strength, and a porous aluminum-based composite material prepared from the hollow glass beads is low in strength and poor in energy absorption effect are solved. The method comprises the steps that hollow glass beads, silicon carbide reinforcement, aluminum metal powder and aluminum ingots are weighed, the silicon carbide reinforcement and the hollow glass beads are mixed to obtain composite powder, the dried composite powder and the aluminum metal powder are mixed to obtain mixed powder, and a graphite mold is filled with the mixed powder to obtain a preheated prefabricated body; molten aluminum metal is prepared; and finally, liquid aluminum is infiltrated. The nano silicon carbide and the hollow glass beads are mixed, the silicon carbide reinforcement can uniformly cover the surfaces of the glass beads, and the silicon carbide reinforcement and the glass beads form mechanical combination, so that the bearing capacity of the hollow glass beads is improved, and the composite material has relatively high porosity.

Description

Technical field: [0001] The present invention relates to a method of preparing an aluminum-based composite material Background technique: [0002] The foam metal is a metal material containing a large number of pore structures, has a large porosity, specific surface area, specific strength, specific rigidity, and good resistance, damping noise reduction, heat insulation and shielding radiation, etc. in aerospace , Petrochemical, nuclear energy, construction, automobile and other industries have huge application prospects. [0003] The represented foam as a foam metal is a new type of porous metal material with broad research space in recent years. Foam is light, high-than-intensity, can absorb energy at almost unchanged platform stresses, but due to foam strength, the stiffness is not high, the usual research direction is used as a sandwich structure in the impact and suction Each industry in sound demand. The preparation process of foam is relatively complicated, and the cost is...

Claims

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Application Information

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Patent Type & Authority Applications(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
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