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Nano-ceramic particle reinforced aluminum foam matrix composite material and preparation method thereof

A technology of nano-ceramic particles and aluminum-based composite materials, which is applied in the field of foamed aluminum-based composite materials and its preparation, can solve the problems of large pore size, inability to achieve uniform distribution of nano-ceramic particles, low compressive yield strength, etc. The effect of increasing the number of pores and increasing the compressive yield strength

Inactive Publication Date: 2010-11-03
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the preparation method of the existing ceramic particle-reinforced aluminum foam matrix composite material, the ceramic particles are micron-sized, and the uniform distribution of nano-ceramic particles cannot be realized, resulting in the existing ceramic particle-reinforced aluminum foam matrix composite material with large pore size and compression. The problem of low yield strength, thereby providing nano-ceramic particle reinforced aluminum foam matrix composite material and its preparation method

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  • Nano-ceramic particle reinforced aluminum foam matrix composite material and preparation method thereof

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specific Embodiment approach 1

[0016] Specific implementation mode 1: In this implementation mode, the nano-ceramic particle reinforced foamed aluminum-based composite material is composed of 87% to 98% aluminum or aluminum alloy powder, 1% to 5% CaCO 3 And 1% to 8% nano ceramic particles.

[0017] The pore diameter of the nano-ceramic particles reinforced aluminum foam matrix composite material in this embodiment is less than 1mm, the porosity is 40%-82%, and the density is 0.5-1.68g / cm 3 , the compressive yield strength reaches 50-98MPa, it is a new type of lightweight, high-strength, small pore functional structure integrated composite material. The compressive yield strength (5-25MPa) of the ceramic particle-reinforced foamed aluminum-based composite material obtained by the existing preparation method is increased by 2-20 times.

specific Embodiment approach 2

[0018] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the nano-ceramic particles in the raw material powder are silicon carbide (SiC), silicon oxide (SiO 2 ), alumina (Al 2 o 3 ), titanium diboride (TiB 2 ), silicon nitride (Si 3 N 4 ) or titanium carbide (TiC). Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the particle size of the nano-ceramic particles is 20-80 nm. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A nano-ceramic particle reinforced aluminum foam matrix composite material and a preparation method thereof relates to an aluminum foam matrix composite material and a preparation method thereof. The invention solves the problem that in the preparation method of the ceramic particle reinforced aluminum foam matrix composite material, ceramic particles are micron-sized, the uniform distribution of nano-ceramic particles can not be realized, and the existing ceramic particle reinforced aluminum foam matrix composite material has wide aperture and low compressive yield strength. The aluminum foam matrix composite material of the invention is prepared from aluminum or aluminum alloy powder, CaCO3 and nano-ceramic particles. The preparation method comprises the following steps: using a ball mill to process raw material powder and stearic acid, mixing powder, then placing the mixture in a graphite mould to perform vacuum hot press sintering and obtain a perform, performing forward extruding to obtain a semi-finished product, heating and foaming to obtain the finished product. The aperture of the aluminum foam matrix composite material is less than 1mm, and the compressive yield strength is 50-98MPa which is 2-20 times of that of the existing aluminum foam matrix composite material. By using the method of the invention, the nano-ceramic particles can be uniformly distributed in the aluminum foam matrix composite material.

Description

technical field [0001] The invention relates to a foamed aluminum-based composite material and a preparation method thereof. Background technique [0002] Ceramic particles (such as SiC, SiO 2 , TiB 2 , Al 2 o 3 , Si 3 N 4 and TiC) reinforced foamed aluminum-based composite material is a new type of foamed metal material developed in recent years. ), the mechanical properties of the material (such as tensile strength, yield strength and stiffness) are improved due to the addition of high-strength, high-hardness ceramic particles as reinforcements for aluminum foam. [0003] At present, the reinforcements added to foamed aluminum are all micron-sized ceramic particles, which belong to large-pore foamed aluminum materials. Although the mechanical properties have been improved, they still cannot fully meet the performance requirements of structural materials. At present, the ceramic particles used in the conventional melt foaming method can only be of micron size, and th...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/08
Inventor 李爱滨耿林任伟曹国剑李峰杜小米
Owner HARBIN INST OF TECH
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