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Hybrid particles reinforced aluminium-based composite material and preparation method thereof

A technology for particle-reinforced aluminum and composite materials, applied in the field of metal matrix composite materials, can solve the problems of easy sedimentation, low elastic modulus, low elastic modulus, etc., and achieve the effects of inhibiting sedimentation, uniform distribution, and improving elastic modulus

Inactive Publication Date: 2008-07-23
SHANGHAI JIAO TONG UNIV
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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 overcome the deficiencies in the prior art, provide a hybrid particle reinforced aluminum matrix composite material and its preparation method, which solves the problems of low elastic modulus and uneven particle distribution in the particle reinforced aluminum matrix composite materials in the past Defects, SiC and TiB 2 The particles are dispersed in the matrix, which not only solves the defect that large SiC particles are easy to settle, but also solves the problem of single TiB 2 The defect of the elastic modulus of the particle reinforced aluminum matrix composite material is not high, so that the performance of the material is further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation composition is Si 7.0%, Mg 0.3%, SiC 5%, TiB 2 5%, the rest is a hybrid particle reinforced composite of aluminum, the process is as follows:

[0018] After the aluminum ingot is melted, add KCl, NaCl, Na 3 AlF 6 Cover with covering agent, measure temperature after melting, when the temperature reaches 900°C, add K 2 TiF 6 、KBF 4 Mix the salt, stir with a stirring device at a stirring speed of 400rpm for 10min, and the stirring temperature is 900°C, and scoop out the mixed salt reaction product. After the temperature drops to 720°C, add the SiC / Al composite material, and stir for 5 minutes at a stirring speed of 400rpm after it is completely melted, and the stirring temperature is 720°C. After adding Si and Mg to adjust the chemical composition, let it stand at 750°C for 10 minutes and then pour it into the drawing die to obtain SiC and TiB 2 Particle hybrid reinforced aluminum matrix composites. Observing the metallographic structure of the comp...

Embodiment 2

[0020] The preparation composition is Si 12.0%, Mg 1.5%, Cu 1.0%, Ni 1.5%, SiC 10%, TiB 2 10%, the rest is a hybrid particle reinforced composite of aluminum, the process is as follows:

[0021] After the aluminum ingot is melted, add KF and MgCl 2 Cover with KCl covering agent, measure temperature after melting, when the temperature reaches 790°C, add K which has been heat-preserved and dried for 3.5 hours 2 TiF 6 、KBF 4 Mix the salt, stir with a stirring device at a stirring speed of 300rpm for 20min, and the stirring temperature is 790°C, and scoop out the mixed salt reaction product. After the temperature drops to 750°C, add the SiC / Al composite material, and stir at a stirring speed of 200rpm for 10min after it is completely melted, and the stirring temperature is 750°C. After adding Si, Mg, Cu, Ni to adjust the chemical composition, after standing at 730°C for 20 minutes, pour it into the drawing die to get SiC and TiB 2 Particle hybrid reinforced aluminum matrix c...

Embodiment 3

[0023] The preparation composition is Si 4.5%, Mg 0.45%, Cu 1.5%, SiC 20%, TiB 2 10%, the rest is a hybrid particle reinforced composite of aluminum, the process is as follows:

[0024] Add MgCl after the aluminum ingot is melted 2 、Na 2 SiF 6 , Cover with NaF covering agent, measure temperature after melting, when the temperature reaches 750°C, add K 2 TiF 6 、KBF 4 Mix the salt, stir with a stirring device at a stirring speed of 200rpm for 30min, and the stirring temperature is 750°C, scoop out the mixed salt reaction product. After the temperature drops to 730°C, add the SiC / Al composite material, and stir at a stirring speed of 300rpm for 10min after it is completely melted, and the stirring temperature is 730°C. After adding Si, Mg and Cu to adjust the chemical composition, let it stand at 680°C for 30 minutes and then pour it into the drawing die to obtain SiC and TiB 2 Particle hybrid reinforced aluminum matrix composites. Observing the metallographic structure ...

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Abstract

The invention relates to a sophisticated-particle reinforced aluminium-basis composite, in which the component and percentage by weight is: 4.5-13.0% silicon, 0-1.5% magnesium,0-1.5% copper,0-1.5% nickel,5.0-20.0% carbofrax,5.0-10.0% titanium boride and other is aluminum. The process for preparing is as follows: melting aluminum ingot in copple then blanketing flux with covering agent; after the heat preservation of aluminum flux, adding the dried titanium potassium fluoride and boron potassium fluoride mixed salts and adequately mixing, and scooping out the reaction product of mixed salts after the reaction; adding calcium acetylide / aluminum composite in flux and mixing it after it fully melts, afterwards adding silicon or silicon and magnesium, or silicon, magnesium, aluminum-copper and aluminum- nickel or silicon, magnesium and aluminum-copper to adjust chemical composition, and pouring-in ingot after storage. The carbofrax and titanium boride particles of this invention dispersedly distributes in base, which not only can solve the defect that big carbofrax particle can easily deposit, but also can solve the defect that single titanium boride particle reinforced aluminium-basis composite has a low elastic modulus, and the material performance can be further improved.

Description

technical field [0001] The invention relates to the technical field of metal-matrix composite materials, in particular to a hybrid particle-reinforced aluminum-matrix composite material and a preparation method thereof. Background technique [0002] The traditional aluminum matrix composites only add reinforcement particles to the aluminum matrix or generate reinforcement particles in the aluminum matrix. Both methods have obvious defects, such as: simply adding reinforcement particles to the aluminum matrix The method in the matrix is ​​due to the sedimentation of the reinforcing particles under the action of gravity during the preparation and pouring process, which makes the distribution of the particles in the composite material uneven, which affects the performance of the aluminum matrix composite material; the method of simply making the reinforcing particles in the aluminum matrix Due to the small content of reinforcing particles, it is difficult to prepare aluminum ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02
Inventor 马乃恒吕映宾王浩伟李险峰
Owner SHANGHAI JIAO TONG UNIV
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