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Preparation method of Al2O3 nanoparticle reinforced aluminum-based composite material

A composite material and nanoparticle technology, which is applied in the field of particle-reinforced aluminum-based composite material preparation, can solve the problems of uneven particle distribution, high reaction synthesis temperature, and out-of-control particle phase size, and achieve good distribution uniformity and low synthesis temperature. , Improve the effect of material quality

Active Publication Date: 2011-01-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to invent a new system and method capable of preparing nano-alumina particle-reinforced aluminum matrix composites at a relatively low reaction temperature, so as to solve the problems of uncontrolled particle phase size and particle size in the current reaction system mainly using oxides. Problems of uneven distribution and high reaction synthesis temperature to prepare high-performance particle-reinforced aluminum matrix composites with controllable volume fraction

Method used

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  • Preparation method of Al2O3 nanoparticle reinforced aluminum-based composite material
  • Preparation method of Al2O3 nanoparticle reinforced aluminum-based composite material
  • Preparation method of Al2O3 nanoparticle reinforced aluminum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw materials: industrial pure aluminum, purity 99.8% (mass fraction, the same below);

[0037] Solid powder: industrial borax with a purity of 98% (Na 2 B 4 o 7 10H 2 O) powder and potassium fluozirconate (K 2 ZrF 6 )powder;

[0038] The preparation process is as follows:

[0039] (1) First metal smelting and powder preparation:

[0040] 100Kg of pure aluminum is melted in an electric furnace and heated up to 850°C. The reagents borax and potassium fluozirconate were all dried at 200°C, ground into fine powder (particle size less than 100 μm), and weighed for later use. The added weight was 2Kg of borax, 4.9Kg of potassium fluozirconate (borax and fluozircon Potassium acid weight ratio 29:71).

[0041] (2): reaction synthesis:

[0042] After the melt temperature is 850°C, carry out a refinement, press the solid reactant powder into the melt with a bell jar, and then react with strong stirring for 10 minutes, after the melt temperature drops to 730°C, remove t...

Embodiment 2

[0046] Raw materials: industrial pure aluminum, purity 99.8% (mass fraction, the same below);

[0047] Solid powder: industrial borax with a purity of 99.8% (Na 2 B 4 o 7 10H 2 O) powder and potassium fluozirconate (K 2 ZrF 6 )powder;

[0048] The preparation process is as follows:

[0049] (1) First metal smelting and powder preparation:

[0050] 100Kg of pure aluminum is melted in an electric furnace and heated to 830°C. The reagents borax and potassium fluorozirconate used were all dried at 200°C, ground into fine powder (particle size less than 100 μm), and weighed for later use. The added weight was 4.5Kg of borax and 12Kg of potassium fluorozirconate (borax and fluorozirconate Potassium acid weight ratio 27:73).

[0051] (2): reaction synthesis:

[0052] After the melt temperature is 830°C, carry out a refinement, press the solid reactant powder into the melt with a bell jar, and then react with strong stirring for 10 minutes, after the melt temperature drops t...

Embodiment 3

[0056] Raw materials: industrial pure aluminum, purity 99.8% (mass fraction, the same below);

[0057] Solid powder: industrial borax with a purity of 95.1% (Na 2 B 4 o 7 10H 2 O) powder and potassium fluozirconate (K 2 ZrF 6 )powder;

[0058] The preparation process is as follows:

[0059] (1) First metal smelting and powder preparation:

[0060] 100Kg of pure aluminum is melted in an electric furnace and heated up to 800°C. The reagents borax and potassium fluorozirconate used were all dried at 200°C, ground into fine powder (particle size less than 100 μm), and weighed for later use. The added weight was 6.3Kg of borax and 14Kg of potassium fluorozirconate (borax and fluorozirconate Potassium acid weight ratio 31:69).

[0061] (2): reaction synthesis:

[0062] After the melt temperature is 800°C, carry out a refinement, press the solid reactant powder into the melt with a bell jar, and then react with strong stirring for 10 minutes, after the melt temperature drop...

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Abstract

The invention provides a preparation method of a Al2O3 nanoparticle reinforced aluminum-based composite material, belonging to the technical field of the aluminum-based composite material. The method uses sodium borate (Na2B4O7.10H2O) type boride and K2ZrF6 type fluoride powder as the reaction mixed salt and adopts the direct reaction of molten metal to directly synthetize the nano-Al2O3 particlereinforced aluminum-based composite material in molten aluminum. The invention mainly has the following advantages: the reaction system can effectively control the growth of Al2O3 particles and ensure that the size of the reinforcement phase is controlled to the nanoscale; and the synthesis temperature of the reaction system is 800-850 DEG C, and the defects of the traditional method which uses oxide to prepare the Al2O3 particle reinforced aluminum-based composite material can be overcome, wherein the defects are that the particles are easy to grow, the size can not be controlled and the reaction temperature is high. In addition, with the increase of the addition amount of the reaction mixed salt in the reaction system, the reinforcing particles have smaller size and more uniform distribution; the interface binding of the particles and the substrate is good, no pollution is caused; and the preparation method is an effective method which is suitable for preparing the high-performance nanoparticle reinforced composite material at a low temperature.

Description

technical field [0001] The invention relates to the technical field of preparation of particle-reinforced aluminum-based composite materials, in particular to a new system and method for reactively synthesizing nano-alumina particle-reinforced aluminum-based composite materials. Background technique [0002] Particle-reinforced aluminum matrix composites have gradually become a new type of material that is more and more widely used because of its composite structural characteristics and good physical, chemical and mechanical properties. At present, the melt direct reaction method is an important method for preparing particle-reinforced aluminum matrix composites. This method is to add reactants to the melt, and form a reinforced particle phase through the in-situ chemical reaction between the reactants and the aluminum matrix. The advantages of this method for preparing particle-reinforced metal matrix composites are that the interface between the particle phase and the alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C21/00C22C1/02
Inventor 赵玉涛李桂荣王宏明陈刚陈登斌
Owner JIANGSU UNIV
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