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Method for preparing ceramic particle reinforced foamed aluminum-matrix composite material

A technology of aluminum-based composite materials and ceramic particles, which is applied in the field of preparation of foamed aluminum-based composite materials, can solve the problems of uneven distribution of pores, difficulty in controlling the decomposition rate, and high production cost of foamed aluminum-based composite materials, and achieve controllable distribution of pores , low price, low cost effect

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

[0004] The purpose of the present invention is in order to solve the blowing agent TiH that existing melt foaming method adopts 2 The price is expensive, pretreatment is required, and the decomposition rate is difficult to control, resulting in high production costs and uneven distribution of pores in the obtained foamed aluminum-based composite material. The invention provides a method for preparing ceramic particle-reinforced foamed aluminum-based composite material

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  • Method for preparing ceramic particle reinforced foamed aluminum-matrix composite material

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specific Embodiment approach 1

[0012] Specific embodiment one: The preparation method of the ceramic particle reinforced aluminum foam matrix composite material in this embodiment is realized through the following steps: 1. By volume percentage, 65% to 94% of aluminum alloy powder and 5% to 30% of ceramic particles and 1% to 5% CaCO 3 The raw material powder after powder mixing is put into the powder mixing machine and mechanically mixed for 8 to 24 hours to obtain the mixed powder; 2. Put the mixed powder into the graphite mold, and then put the graphite mold into the vacuum hot-press sintering furnace, Then evacuate to 0.01-0.1Pa, then heat to 500-650°C, then apply a pressure of 10-30MPa to the mixed powder in the graphite mold, and keep the pressure for 30-120min, then cool to room temperature with the furnace, 3. Heat the preform to 400-550°C, heat it for 20-60 minutes, and then carry out hot-extrusion deformation by direct extrusion, wherein the extrusion ratio is 9:1-36:1; 4. Heat the prefabricated b...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ceramic particles in step 1 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 steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that the aluminum alloy powder in step 1 is wrought aluminum alloy (6xxx) powder, hard aluminum alloy (2xxx) powder or cast aluminum alloy (ZLxxx) powder. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method for preparing a ceramic particle reinforced foamed aluminum-matrix composite material, which relates to a method for preparing a foamed aluminum-matrix composite material. The method solves the problems of high production cost and nonuniform pore distribution of the obtained foamed aluminum-matrix composite material due to a foaming agent TiH2 adopted in a conventional melt-foaming method which is expensive, needs pretreatment and has a difficultly controlled decomposition rate. The method comprises the following steps of: mixing aluminum alloy powder, ceramic particles and calcium carbonate (CaCO3) powder and placing a mixture into a graphite mould; placing the graphite mould into a vacuum hotpressing sintering furnace to prepare a prefabricated body; and performing forward extrusion, heating and foaming on the prefabricated body to obtain the ceramic particle reinforced foamed aluminum-matrix composite material. By using a powder metallurgic method and taking the CaCO3 powder as a foaming agent, the method has the advantages of low price, no pretreatment, simple process, stable decomposition rate, convenience for industrial production and uniform pore distribution of the obtained composite material which has a pore diameter of 0.5 to 2 mm, a porosity of 40 to 82 percent and a compressive yield strength of 36 to 70 MPa.

Description

technical field [0001] The invention relates to a preparation method of a foamed aluminum-based composite material. Background technique [0002] Ceramic particles (such as SiC, SiO 2 , TiB 2 , Al 2 o 3 , Si 3 N 4 And TiC) reinforced aluminum foam matrix composite material is a new type of metal foam material developed in recent years. On the basis of maintaining the good functional properties of aluminum foam (such as vibration reduction, damping, sound absorption, sound insulation, heat dissipation, impact energy absorption, electromagnetic shielding), due to the addition of high-strength, high-hardness ceramic particles, the room temperature and The high-temperature mechanical properties (such as tensile strength, yield strength and stiffness) are significantly increased, which fully possesses the inherent potential to improve the mechanical properties of foamed metal materials. Therefore, the preparation and performance research of ceramic particle reinforced alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08
Inventor 李爱滨任伟曹国剑耿林崇严李峰
Owner HARBIN INST OF TECH
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