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A method for in-situ preparation of nanoparticle-reinforced aluminum matrix composites

A nanoparticle and composite material technology, applied in the field of metal matrix composite material preparation, can solve the problems of not too high performance of composite materials, complicated process, etc., and achieve high yield of reactants, improved mechanical properties, and original melt The effect of low reaction temperature

Inactive Publication Date: 2016-01-13
WUXI HONGXIANG THERMAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reaction temperature used in this technology is also relatively low, which is 720-760°C, and the reaction time is 10-30 minutes. However, due to the addition of reaction aids in the reaction process, the process is complicated, and it will also lead to the formation of A large amount of salt slag, although the slag removal treatment has been carried out, the performance of the prepared composite material is not too high, and needs to be further improved

Method used

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  • A method for in-situ preparation of nanoparticle-reinforced aluminum matrix composites
  • A method for in-situ preparation of nanoparticle-reinforced aluminum matrix composites

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Effect test

Embodiment 1

[0031] Al powder, TiO 2 Powder and B 2 o 3 The powders were dried in a vacuum oven for 2 hours at a temperature of 180°C. After removing the moisture in the powders, the 2 Powder and B 2 o 3 The mass ratio of powder is 1.14:1, TiO 2 Powder and B 2 o 3 The mass ratio of the sum of the powder and the Al powder is 1:1.8, put it into a vacuum ball mill tank, according to the mass ratio of the ball material to the mixed powder is 12:1, add stainless steel grinding balls, and close the ball mill tank; 1 Φ15 stainless steel ball, 6 Φ5 stainless steel balls, and the rest are stainless steel balls with a diameter of Φ10. Seal the can, evacuate it, and then fill the ball mill with argon gas at an air pressure of 0.2MPa; vacuumize the above-mentioned ball mill to reach the same degree of vacuum, and repeat this three times to prevent air from remaining in the ball mill. Finally, keep the ball milling tank under vacuum conditions, and then ball mill for 5 hours under the condition...

Embodiment 2

[0034] Al powder, TiO 2 Powder and B 2 o 3 The powders were dried in a vacuum oven for 2 hours at a temperature of 180°C. After removing the moisture in the powders, the 2Powder and B 2 o 3 The mass ratio of powder is 1:1.2, TiO 2 Powder and B 2 o 3 The mass ratio of the powder sum to the Al powder is 1:1, put it into a vacuum ball mill tank, according to the mass ratio of the ball material to the mixed powder is 5:1, add stainless steel grinding balls, and close the ball mill tank; 1 Φ15 stainless steel ball, 6 Φ5 stainless steel balls, and the rest are stainless steel balls with a diameter of Φ10. Seal the can, evacuate, and then fill the ball mill with argon gas at a pressure of 0.1MPa; vacuumize the above ball mill to reach the same degree of vacuum, and repeat this three times to prevent air from remaining in the ball mill. Finally, keep the ball milling tank under vacuum conditions, and then ball mill for 5 hours under the condition of a rotating speed of 450rmp....

Embodiment 3

[0037] Al powder, TiO 2 Powder and B 2 o 3 The powders were dried in a vacuum oven for 2 hours at a temperature of 180°C. After removing the moisture in the powders, the 2 Powder and B 2 o 3 The mass ratio of powder is 1:1, TiO 2 Powder and B 2 o 3 The mass ratio of the sum of powder and Al powder is 1:1.2, put it into a vacuum ball mill tank, according to the mass ratio of the ball material to the mixed powder is 15:1, add stainless steel grinding balls, and close the ball mill tank; 1 Φ15 stainless steel ball, 6 Φ5 stainless steel balls, and the rest are stainless steel balls with a diameter of Φ10. Seal the can, evacuate, and then fill the ball mill with argon gas at a pressure of 0.3 MPa; vacuumize the above ball mill to reach the same degree of vacuum, and repeat this three times to prevent air from remaining in the ball mill. Finally, keep the ball milling tank under vacuum conditions, and then ball mill for 5 hours under the condition of a rotating speed of 400r...

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Abstract

The invention discloses a method for in situ preparation of a nano particle reinforced aluminum-based composite material, and belongs to the metal-based composite material preparation technology field. The method comprises the steps: according to the mass ratio of a dried TiO2 powder to a dried B2O3 powder being 1-1.2:1, and the mass ratio of the sum of the TiO2 powder and the B2O3 powder to an Al powder being 1:1-2, mixing the TiO2 powder, the B2O3 powder and the Al powder, then putting into a vacuum ball milling tank, at the same time, adding stainless steel milling balls according to the mass ratio of the balls to the mixed powder being 5-15:1, vacuumizing the ball milling tank to 0.1-0.3 MPa, and then carrying out high energy ball milling for 5-9 h at the speed of 350-450 rpm; adding the mixed powder after high energy ball milling into an aluminum alloy melt with the temperature of 700 to 800 DEG C, stirring, carrying out a reaction for a period of time, allowing to stand, deslagging, and casting to obtain the in situ nano Al2O3 and TiB2 particle reinforced aluminum-based composite material. The method has the advantages of simple process, high reactant yield, low in situ reaction temperature of the melt and short reaction time; and the average size of the prepared in situ particles is in the range of 60 nm-100 nm, and the tensile strength of the composite material is increased by more than 95% compared with that of a matrix alloy.

Description

technical field [0001] The invention belongs to the technical field of metal-matrix composite material preparation, and in particular relates to a method for preparing nanoparticle-reinforced aluminum-matrix composite material by in-situ reaction of melt combined with high-energy ball milling. Background technique [0002] Particle-reinforced aluminum matrix composites have excellent physical and mechanical properties such as high specific strength, specific stiffness, wear resistance, fatigue resistance, low density, good dimensional stability and thermal conductivity, and are widely used in aerospace, automotive, electronics, optics, etc. and other fields have a wide range of uses. Countries around the world have invested huge sums of money in research and development from the preparation process, organizational structure, mechanical properties, thermal conductivity, thermal expansion properties and wear resistance of such materials. [0003] At present, the preparation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/10
Inventor 刘洪冰张松利钱国平钱华
Owner WUXI HONGXIANG THERMAL TECH