Preparation method for Al2O3 hollow sphere/aluminum porous composite material

A technology of porous composite materials and hollow spheres is applied in the field of preparation of aluminum-based porous composite materials, which can solve the problems of high cost, harsh process conditions, low strength and the like, and achieve the effects of convenient operation, improved mechanical properties and low cost.

Active Publication Date: 2014-03-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low strength of traditional aluminum foam materials, harsh process conditions and high cost in existing preparation methods, and provide Al 2 o 3 Preparation method of hollow sphere / aluminum porous composite material

Method used

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  • Preparation method for Al2O3 hollow sphere/aluminum porous composite material
  • Preparation method for Al2O3 hollow sphere/aluminum porous composite material

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 As shown, this embodiment Al 2 o 3 The preparation method of the hollow sphere / aluminum porous composite material is realized according to the following steps:

[0025] 1. Al 2 o 3 Hollow sphere filling: Al 2 o 3 Hollow balls are loaded into the mold cavity 3 to prepare prefabricated blocks;

[0026] 2. Preheating: heat the mold with the prefabricated blocks to 400-600°C in the electric furnace 5 for preheating;

[0027] 3. Pouring: the matrix is ​​heated in another electric furnace until it melts, and the metal liquid is obtained and poured into the mold cavity 2;

[0028] 4. Pressurized impregnation: use the pressure head 1 to apply a pressure of 20-40 MPa to the metal liquid in the casting cavity 2;

[0029] 5. Pressure holding and cooling: After the metal liquid is completely infiltrated, keep the pressure until it cools naturally, demould, take out the ingot material, and the Al 2 o 3 Preparation of hollo...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, Al with a particle size of 0.5 mm and an inner cavity diameter of 0.4 2 o 3 The hollow balls are loaded into the mold cavity 3 to prepare a prefabricated block. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step one, Al with a particle size of 1.2 mm and an inner cavity diameter of 1.0 mm 2 o 3 The hollow balls are loaded into the mold cavity 3 to prepare a prefabricated block. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a preparation method for an Al2O3 hollow sphere / aluminum porous composite material, relates to a preparation method for an aluminum-based porous composite material, which solves the problems that the strength of a traditional foam aluminum material is low, the process conditions are harsh and the cost is high in an existing preparation method. The preparation method 1 comprises the following steps: step 1. filling an Al2O3 hollow sphere; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and carrying out de-molding to obtain the Al2O3 hollow sphere / aluminum porous composite material. The preparation method 2 comprises the following steps: step 1. mixing the Al2O3 hollow spheres with different grain diameters and filling; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and de-molding to obtain the Al2O3 hollow sphere / aluminum porous composite material. The Al2O3 hollow sphere / aluminum porous composite material is prepared by immersing aluminum or aluminum alloy into a gap between Al2O3 hollow ball prefabricated blocks; porous structure characterizes of the Al2O3 hollow spheres are maintained and a strengthening mechanism of the aluminum-based composite material is introduced, so that the mechanical properties of materials are improved. According to the preparation method, the operation is convenient, the cost is low, the process is simple, and the production cost is reduced.

Description

technical field [0001] The invention relates to a preparation method of an aluminum-based porous composite material. Background technique [0002] Aluminum foam has low density, high specific strength, good energy absorption capacity and impact resistance. There is a stress platform in its compressive stress-strain curve, and a large plastic deformation occurs at an approximate constant stress level, which can be effectively absorbed by its own deformation. external impact. Therefore, aluminum foam materials can be used as anti-shock load components in aerospace, weapon industry, transportation and engineering structures, such as spacecraft, armored vehicles, automobile bumpers, etc., to protect the device itself and the internal personnel and components. [0003] Aluminum foam materials prepared by traditional liquid foaming methods (such as direct introduction of gas, foaming agent decomposition to generate gas, etc.) or powder metallurgy methods have relatively low stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00C22C32/00
Inventor 张强武高辉姜龙涛修子杨陈国钦
Owner HARBIN INST OF TECH
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