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Preparation method for nano CuAl2/Al2O3 reinforced aluminum matrix composite material by in-situ synthesis

A technology for strengthening aluminum matrix and composite materials, which is applied in the field of metal matrix composite material preparation, and can solve problems such as reducing risks

Inactive Publication Date: 2018-12-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method for preparing CuAl by in-situ synthesis 2 / Al 2 o 3 A method for strengthening aluminum-based composite materials, which can reduce the risk and can effectively overcome the shortcomings of strengthening phase grain boundary segregation and uneven distribution in the casting method

Method used

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  • Preparation method for nano CuAl2/Al2O3 reinforced aluminum matrix composite material by in-situ synthesis
  • Preparation method for nano CuAl2/Al2O3 reinforced aluminum matrix composite material by in-situ synthesis
  • Preparation method for nano CuAl2/Al2O3 reinforced aluminum matrix composite material by in-situ synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 19.8g aluminum powder (such as figure 1 shown), 0.2g copper oxide powder (as figure 2 Shown), 0.2g stearic acid (as process control agent, prevents cold welding from occurring in the ball milling process), is placed in the stainless steel ball mill jar of 250 milliliters, and fills with argon. Use a planetary ball mill to mill for 2 hours at 200r / min, with a ball-to-material ratio of 15:1. Take out the mixed powder after ball milling in the vacuum glove box (such as image 3 shown). In order to accurately measure the temperature required for hot-press sintering, firstly, the ball mill mixed powder is cold-pressed into a block, and the DSC-TG test is performed on the cold-pressed block. Then use a mold with a diameter of 45mm to carry out vacuum hot pressing sintering, the sintering temperature is 620°C, and the sintering pressure is 50MPa. Obtain nano-CuAl with a diameter of 45mm and a thickness of about 4mm 2 / Al 2 o 3 Reinforced aluminum matrix composite...

Embodiment 2

[0030] Take by weighing 19.8g aluminum powder, 0.4g copper oxide powder, 0.2g stearic acid (as process control agent, prevent cold welding from occurring in the ball milling process), be placed in the stainless steel ball mill jar of 250 milliliters, and be filled with argon. Use a planetary ball mill to mill for 2 hours at 200r / min, with a ball-to-material ratio of 15:1. The mixed powder after ball milling was taken out in a vacuum glove box, and a mold with a diameter of 45mm was used for vacuum hot pressing sintering at a sintering temperature of 620°C and a sintering pressure of 50MPa. Obtain nano-CuAl with a diameter of 45mm and a thickness of about 4mm 2 / Al 2 o 3 Reinforced aluminum matrix composite samples.

[0031] The aluminum-based composite material is processed into a pattern that can be used for stretching by wire cutting, and it is stretched by a universal tensile testing machine at a stretching rate of 0.5mm / min to obtain the tensile engineering stress-strai...

Embodiment 3

[0033] Take by weighing 19.8g aluminum powder, 0.6g copper oxide powder, 0.2g stearic acid (as process control agent, prevent cold welding from occurring in the ball milling process), be placed in the stainless steel ball mill jar of 250 milliliters, and be filled with argon. Use a planetary ball mill to mill for 2 hours at 200r / min, with a ball-to-material ratio of 15:1. The mixed powder after ball milling was taken out in a vacuum glove box, and a mold with a diameter of 45mm was used for vacuum hot pressing sintering at a sintering temperature of 620°C and a sintering pressure of 50MPa. Obtain nano-CuAl with a diameter of 45mm and a thickness of about 4mm 2 / Al 2 o 3 Reinforced aluminum matrix composite samples.

[0034] The aluminum-based composite material is processed into a pattern that can be used for stretching by wire cutting, and the tensile engineering stress-strain curve of the composite material is obtained by using a universal tensile testing machine for stre...

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Abstract

The invention relates to a preparation method for a nano CuAl2 / Al2O3 reinforced aluminum matrix composite material by in-situ synthesis. The preparation method comprises the following steps of (1), preparing mixed powder, weighing the mixed powder according to the mass ratio of copper oxide powder to aluminum powder or aluminum alloy powder being less than 10%, (2), ball-milling the mixed powder,putting the mixed powder into a nodular graphite tank and ball-milling the mixed powder under the protection of argon, wherein the ball milling parameters are the ball-to-material ratio of 5:1-15:1, the rotating speed of 200 r / min and the ball milling time of 1-4 hours, and (3), sintering and forming.

Description

technical field [0001] The invention relates to a method for in-situ synthesis of nano-CuAl by using a powder metallurgy process 2 / Al 2 o 3 The invention discloses a method for strengthening an aluminum-based composite material, which belongs to the technical field of metal-based composite material preparation. Background technique [0002] Aluminum matrix composites are widely used in aerospace and civil fields due to their high specific strength, good electrical and thermal conductivity, and other advantages. In traditional aluminum matrix composites, ceramic particles, ceramic whiskers, and spinel particles are often used as reinforcing phases, and the method of introducing reinforcing phases is mainly the external method. However, there are several shortcomings in the above composite material system design and preparation technology. Firstly, introducing the reinforcing phase through the external addition method will lead to uneven distribution of the reinforcing ph...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C32/00C22C1/05B22F9/04
CPCC22C21/12B22F9/04B22F2009/043C22C1/058C22C32/0036
Inventor 赵乃勤戎旭东何春年师春生何芳马丽颖刘恩佐
Owner TIANJIN UNIV
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