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Method for synthesizing particle reinforced composite material under pulsed electric field and electromagnetic field

A pulsed electric field and composite material technology is applied in the field of preparation of particle-reinforced metal matrix composite materials, which can solve the problems of difficulty in improving the reaction speed and efficiency, and the easy agglomeration and growth of particle-reinforced phases, so as to promote the control of particle morphology and synthesis. The effect of shortening the time and increasing the amount of spawns

Inactive Publication Date: 2011-06-29
JIANGSU UNIV
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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 synthesizing particle-reinforced metal-matrix composites under the coupled action of pulsed electric field and electromagnetic field, so as to solve the difficulty in improving the reaction speed and efficiency of particle-reinforced metal-matrix composites prepared by the current melt reaction synthesis method , the key issues such as the particle-reinforced phase-easy agglomeration and growth, to realize the industrial-scale preparation and application of high-performance particle-reinforced metal matrix composites

Method used

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  • Method for synthesizing particle reinforced composite material under pulsed electric field and electromagnetic field
  • Method for synthesizing particle reinforced composite material under pulsed electric field and electromagnetic field
  • Method for synthesizing particle reinforced composite material under pulsed electric field and electromagnetic field

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of ZrB 2 Particulate Reinforced Aluminum Matrix Composites

[0032] Raw materials: base metal: aluminum alloy; solid powder: potassium fluozirconate and potassium fluoborate powder (purity: 99%), refining degassing agent and slag removal agent;

[0033] The preparation process is as follows:

[0034] (1) First metal smelting and powder preparation:

[0035] Aluminum alloy 50Kg is melted in a 25kW crucible resistance furnace and heated up to 900°C, degassed and slag removed; all reagents used are fully dried at 200°C, and the reaction salt is ground into fine powder (with a particle size of less than 100 mu m), weighed and ready to use, the weight of the reaction salt added is 20% of the weight of the metal (the weight ratio of potassium fluozirconate to potassium fluoborate is: 6.2:7.8).

[0036] (2): Melt reaction synthesis to prepare composite material melt:

[0037] After the melt temperature is qualified, a refining is carried out, an...

Embodiment 2

[0043] Implementation example 2: preparation (Al 3 Zr (s) +Al 2 o 3(s) ) particle reinforced aluminum matrix composites

[0044] Raw materials: base metal: aluminum alloy; solid powder: industrial zirconium carbonate (Zr(CO 3 ) 2 ) powder (purity 99.20%), refining degassing agent and slag removal agent;

[0045] In situ reaction equation: 7Al (l) +Zr(CO 3 ) 2(s) =Al 3 Zr (s) +2Al 2 o 3(s) ;

[0046] Particle reinforcement phase: Al 3 Zr (s) and Al 2 o 3(s) ;

[0047] The preparation process is as follows:

[0048] (1) First metal smelting and powder preparation:

[0049] Aluminum alloy 50Kg was melted in a 25kW crucible resistance furnace and heated up to 900°C, degassed and slag removed; all reagents used were fully dried at 300°C, of ​​which Zr(CO 3 ) 2 Grind into fine powder (particle size less than 100 mu m), ready to use after weighing, Zr(CO 3 ) 2 The added weight is 10% of the metal weight (Note: The theoretical volume fraction of ...

Embodiment 3

[0054] Implementation example 3 preparation (Al 3 Zr (s) + ZrB 2(s) ) Particle-reinforced Al-based composites

[0055] Raw materials: base metal: 7055 aluminum alloy; reaction salt: K 2 ZrF 6 -KBF 4 (Mass ratio 6.2:7.8) Mixed salt powder, refining degassing agent and slag removal agent;

[0056] The preparation process is as follows:

[0057] (1) First metal smelting and powder preparation:

[0058] 100Kg 7055 aluminum alloy is melted in a crucible-type induction furnace and heated to 900°C, degassed, slag removed, and ready for use; all reagents used are fully dried at 250°C-300°C, of ​​which K 2 ZrF 6 -KBF 4 , to be ground into fine powder (particle size less than 200 mesh), the added weight is 20% of the metal weight.

[0059] (2): Melt reaction synthesis to prepare composite material melt:

[0060] Its operation process and the method adopted are identical with embodiment 1, and the electromagnetic parameter scope of the pulse electric field used is: pu...

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Abstract

The invention provides a new method for synthesizing a particle reinforced metal-based composite material under the coupling effect of the pulsed electric field and the electromagnetic field, belonging to the technical field of material preparation. The method is mainly characterized in that the pulsed electric field and the electromagnetic field are applied to melt in the synthetic process of preparing the particle reinforced composite material through the traditional direct melt reaction method; the current peak density of the pulsed electric field is 0.1-10A / cm2; the pulse frequency is 0.1-10Hz; the applied electromagnetic field is the low-frequency alternating electromagnetic field; the electromagnetic parameters are as follows: the frequency is 1-50Hz and the working current is 1-1000A; the magnetic induction of the melt center is controlled between 0.01T and 1T; and the time for treating the melt by the pulsed electric field and the electromagnetic field is 3-10 minutes. The method has the following beneficial effects: the synthetic reaction rate and yield can be obviously improved; and the method has obvious effects on controlling the particle morphology and promoting dispersion and is suitable for preparing the high-performance particle reinforced composite material in industrial scale.

Description

technical field [0001] The invention relates to the technical field of preparation of particle-reinforced metal-matrix composite materials, in particular to a new method for preparing particle-reinforced metal-matrix composite materials through direct reaction synthesis of melts under the coupled action of a pulsed electric field and an electromagnetic field. Background technique [0002] Particle-reinforced metal matrix composites have gradually become a new type of material that is more and more widely used due to their composite structural characteristics and good physical, chemical and mechanical properties. There are mainly two mature methods for the preparation of particle-reinforced metal matrix composites: Plus enhanced particle method and in situ reaction generation method. [0003] For the method of adding reinforced particles, after searching the existing technology, it is found that the Chinese patent: CN 1510153, the publication date is: 2004.07.07, the name of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C32/00B22D1/00
Inventor 王宏明李桂荣赵玉涛
Owner JIANGSU UNIV
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