Nano TiC ceramic particle reinforced aluminum matrix composite and preparation method thereof

A technology of ceramic particles and reinforced aluminum matrix, which is applied in the field of metal matrix composite materials, can solve the problems of fast reaction speed, segregation, and easy growth of reinforced phase particles, and achieve the effect of uniform distribution and good roundness

Inactive Publication Date: 2015-04-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to factors such as fast in-situ reaction speed and difficult control of the reaction process, the composition and structure of the reaction product are not satisfactory, and the particles of the strengthening phase tend to grow and segregate, resulting in the overall performance of the material not meeting the design requirements. Mechanical stirring or electromagnetic stirring is often used to achieve the purpose of homogenization, but the effect is not ideal

Method used

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  • Nano TiC ceramic particle reinforced aluminum matrix composite and preparation method thereof
  • Nano TiC ceramic particle reinforced aluminum matrix composite and preparation method thereof
  • Nano TiC ceramic particle reinforced aluminum matrix composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of in-situ synthesis of nano TiC ceramic particle reinforced aluminum matrix composite material, the steps are as follows:

[0021] Step 1. Take the powder ingredients of aluminum powder, titanium powder, graphite powder and NaCl; wherein, the molar ratio of titanium powder to graphite powder is 1:1.2, and the molar ratio of NaCl to the total amount of titanium powder and graphite powder is 3:25 , the mass ratio of Al powder to the total amount of titanium powder and graphite powder is 3:7;

[0022] Step 2, mixing the prepared powder in a roller ball mill for 12 hours;

[0023] Step 3. Press the mixed powder into a cylindrical prefabricated block with a diameter of 10 mm and a height of 10 mm under a pressure of 20 MPa, and dry it in a drying oven for 6 hours at a temperature of 70 ° C;

[0024] Step 4. Put the weighed industrial pure aluminum ingot into the graphite crucible, heat it to 850°C in a well-type resistance furnace, keep it warm f...

Embodiment 2

[0027] The difference from Example 1 is that the addition amount of the nano-TiC ceramic reinforcement is 1% of the weight percentage of the matrix aluminum.

Embodiment 3

[0029] The difference from Example 1 is that the addition amount of the nano-TiC ceramic reinforcement is 15% of the weight percentage of the matrix aluminum.

[0030] After analysis, the synthesized nano-TiC ceramic particles have good roundness and a size of 0.1-1 micron, and the composite material has good purity and no other impurities, and no NaCl peak exists.

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Abstract

The invention relates to a nano TiC ceramic particle reinforced aluminum matrix composite and a preparation method thereof. The nano TiC ceramic particle reinforced aluminum matrix composite comprises a matrix and a nano TiC ceramic reinforcer, wherein the aluminum serves as the matrix. The nano TiC ceramic reinforcer has a size of 0.1-1mu m, and the addition amount of the nano TiC ceramic reinforcer is 1-15% of that of aluminum. The nano TiC ceramic reinforcer is prepared from aluminum powder, titanium powder, graphite powder and NaCl, wherein NaCl serves as a refiner, the molar ratio of titanium powder to graphite powder is 1:1.2, the molar ratio of NaCl to titanium powder and graphite powder is 3:25, and the mass ratio of aluminum powder to titanium powder and graphite powder is 3:7. The preparation method of the nano TiC ceramic particle reinforced aluminum matrix composite comprises the steps: pre-pressing aluminum powder, titanium powder, graphite powder and NaCl into a block, adding the block into an aluminum melt, carrying out reaction on the block and the aluminum melt to obtain the nano TiC ceramic particle reinforced aluminum matrix composite. The nano TiC ceramic reinforcer (particle) has good roundness, can be distributed uniformly in aluminum and can be well combined with aluminum.

Description

technical field [0001] The invention relates to hard ceramic particle-reinforced metal-based composite materials, in particular to in-situ synthesis of nano-TiC ceramic particle-reinforced aluminum-based composite materials and a preparation process thereof, belonging to the field of metal-based composite materials. Background technique [0002] With the development of science and technology, especially the rapid development of aerospace, national defense, transportation and other fields, the requirements for the comprehensive performance of materials are getting higher and higher, and a single material can no longer meet this requirement. Particle-reinforced aluminum matrix composites have the advantages of high specific strength, wear resistance, and heat resistance, and are used in many fields to replace traditional steel materials. TiC has the advantages of high strength, high modulus, high melting point and good wetting with the aluminum matrix. At the same time, TiC ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/02
Inventor 周泽华袁焕龙仲召军王泽华张欣
Owner HOHAI UNIV
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