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Method for synthesizing particle reinforced aluminum-based composite under high-intensity ultrasonic field and pulsed electric field

A pulsed electric field and composite material technology, which is used in the field of synthesizing particle-reinforced aluminum matrix composites under high-energy ultrasound and pulsed electric field, can solve the problems of coarse particle dispersion, unevenness, low reaction efficiency, etc., achieve simple and safe operation, and increase energy fluctuations. , the effect of precipitation growth promotion

Active Publication Date: 2013-03-13
南通大学技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a new method for preparing particle-reinforced aluminum-based composite materials by direct in-situ reaction of melt under the combination of high-energy power ultrasonic field and electric field, so as to solve the problem of preparing particle-reinforced aluminum-based composite materials by the direct reaction synthesis method of melt at present. Low reaction efficiency of composite materials, coarse and uneven dispersion of particles and other key problems restricting material preparation and performance improvement, to achieve industrial-scale preparation and application of high-performance particle-reinforced aluminum matrix composites

Method used

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  • Method for synthesizing particle reinforced aluminum-based composite under high-intensity ultrasonic field and pulsed electric field
  • Method for synthesizing particle reinforced aluminum-based composite under high-intensity ultrasonic field and pulsed electric field
  • Method for synthesizing particle reinforced aluminum-based composite under high-intensity ultrasonic field and pulsed electric field

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Effect test

Embodiment 1

[0041] Example 1: Prepared under the coupling action of high energy power ultrasonic field and pulsed electric field (Al 3 Zr (s) + ZrB 2(s) ) Particle-reinforced Al-based composites

[0042] Raw material: base metal: pure Al; reaction salt: K 2 ZrF 6 +KBF 4 Powder (mass ratio 6.2:7.8), refining degassing agent and slag removal agent;

[0043] The preparation process is divided into two steps:

[0044] (1): Metal smelting and powder preparation:

[0045] 10Kg of pure Al is melted in a 30kW resistance furnace and heated up to 900°C for degassing and slag removal; all reagents used are fully dried at 250°C, of ​​which K 2 ZrF 6 +KBF 4 , ground into fine powder (particle size less than 100 mesh), K 2 ZrF 6 +KBF 4 The weight of the powder added is 20% of the weight of the metal.

[0046] (2): In situ reaction synthesis to prepare composite material melt:

[0047] The experimental device used in this example is figure 1 As shown, the molten metal that ha...

Embodiment 2

[0058] Example 2: Preparation under the coupling action of high energy power ultrasonic field and pulsed electric field (Al 3 Zr (s) + Al 2 O 3(s) ) Particle-reinforced Al-based composites

[0059] Raw materials: base metal: pure Al; solid powder: industrial zirconium carbonate (Zr(CO 3 ) 2 ) powder, refining degassing agent and slag removal agent;

[0060] The preparation process is divided into two steps:

[0061] (1): Metal smelting and powder preparation:

[0062] 10Kg of pure Al is melted in a 30kW power frequency aluminum melting furnace and heated up to 900°C, degassed and slag removed; all reagents used are fully dried at 250°C, of ​​which Zr(CO 3 ) 2 Grind into fine powder (particle size less than 200 mesh), weighed for later use, Zr(CO 3 ) 2 The added weight is 20% of the metal weight.

[0063] (2): In situ reaction synthesis to prepare composite material melt:

[0064] The experimental device used in this example is figure 1 As shown, th...

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Abstract

The invention relates to the technical field of the preparation of the particle reinforced metal-based composite, in particular to a method for synthesizing a particle reinforced aluminum-based composite under a high-intensity ultrasonic field and a pulsed electric field. The method is mainly characterized in that when the melt direct reaction method is adopted to perform the in-situ reaction of the particle reinforced aluminum-based composite, the high-intensity ultrasonic field and pulsed electric field are both applied on the reaction melt. The parameters of the high-intensity ultrasonic field are as follows: the frequency is 22-30kHz and the intensity is 1-10W / cm<2>. The parameters of the pulsed electric field are as follows: the peak density of current is 0.1-10A / cm<2> and the pulse frequency is 0.1-10Hz. The method has the significant advantage of the coupling of the high-intensity ultrasonic field and the pulsed electric field, thus the thermodynamics and kinetics of the in-situ particle formation reaction can be improved, the mixing of the reactant and the melt can be improved and the shape and size of particles in micron-scale / nanoscale can be controlled; and the dispersion effect of particles in the melt can be controlled, and the method is suitable for the preparation of the high performance micron-nano particle reinforced composite.

Description

technical field [0001] The invention relates to the technical field of preparation of particle-reinforced metal-based composite materials, in particular to a method for synthesizing particle-reinforced aluminum-based composite materials under high-energy ultrasonic and pulsed electric field. Background technique [0002] Particle-reinforced aluminum matrix composites have good mechanical properties and physical and chemical properties due to their composite structural characteristics. One of the research hotspots of aluminum matrix composites; at present, melt direct reaction synthesis is the main method for preparing particle reinforced aluminum matrix composites. The principle of this method is to add alloying elements or compound, react with molten metal in situ at a certain temperature to form a particle phase to obtain an endogenous particle-reinforced composite material; due to the in-situ formation of the particle phase in the preparation of the composite material, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C21/00C22C32/00
Inventor 王宏明李桂荣赵玉涛张廷旺张勋寅
Owner 南通大学技术转移中心有限公司
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