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High-conductivity heat-resistant in-situ synthesized aluminum matrix composite material and preparation method thereof

An aluminum-based composite material, in-situ self-generated technology, applied in the field of metal-based composite materials, can solve problems such as reinforcement dispersion, insufficient electrical conductivity and heat resistance, damage to human health and equipment, and reduced electrical conductivity of composite materials, etc., to achieve simple regulation Ease of operation, less environmental damage, and the effect of improving ductility

Inactive Publication Date: 2019-11-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current in-situ reinforced aluminum matrix composites face the problem of whether the reinforcing phase can be uniformly dispersed, and the electrical conductivity of the composite will inevitably decrease significantly with the introduction of reinforcements.
[0004] After searching the existing technical literature, it was found that in the invention patent with the application number of 201510956925.8, the preparation of particle-mixed aluminum-based composite materials adopts liquid stirring and mixing casting, but the process of this patent is complicated, and gas is easily involved in the stirring process, and the obtained particles Larger size, uneven distribution
[0005] In the invention patent with the application number 201710216302.6, potassium fluozirconate and potassium fluotitanate are used as raw materials. During the preparation process of this patent, harmful gases containing fluorine are released, polluting the environment, and causing serious damage to human health and equipment. Therefore, the existing In situ self-generated aluminum matrix composites have certain deficiencies in preparation, reinforcement dispersion, electrical conductivity and heat resistance

Method used

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  • High-conductivity heat-resistant in-situ synthesized aluminum matrix composite material and preparation method thereof
  • High-conductivity heat-resistant in-situ synthesized aluminum matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides an in-situ self-generated aluminum-based composite material with high conductivity and heat resistance. The aluminum-based composite material is composed of the following elements in weight percentage: Ce is 11.00%, other impurity elements are ≤0.10%, and the rest is aluminum.

[0034] In the aluminum-based composite material in this example, aluminum is used as the matrix, and cerium and aluminum elements form Al 11 Ce 3 The intermetallic compound has good thermal stability, and as a reinforcing phase of the composite material, the strength and heat resistance of the material are effectively improved. The cerium element has a low solid solubility in aluminum, and at the same time has the function of purifying the aluminum matrix, reducing the influence of solid-dissolved impurity elements on the electrical conductivity, and improving the electrical conductivity of the composite material.

[0035] The above-mentioned high-conductivity and heat-...

Embodiment 2

[0044] This embodiment provides an in-situ self-generated aluminum-based composite material with high conductivity and heat resistance. The aluminum-based composite material is composed of the following elements in weight percentage: Ce is 5.00%, other impurity elements are ≤0.10%, and the rest is aluminum.

[0045] The above-mentioned high-conductivity and heat-resistant in-situ self-generated aluminum-based composite material in this embodiment can be prepared by the following method, and the specific steps are as follows:

[0046] Step 1: select Al 99.7% industrial pure aluminum and place it in a smelting furnace to raise the temperature to 750° C. to melt into molten aluminum.

[0047] Step 2: Weigh the raw materials for preparing the aluminum-cerium master alloy according to the composition of Ce5%, add the aluminum-cerium master alloy to the aluminum liquid prepared in the step 1, and use graphite rods to continuously stir, so that the cerium is evenly stirred to obtain a...

Embodiment 3

[0053] An in-situ self-generated aluminum-based composite material with high conductivity and heat resistance, the aluminum-based composite material is composed of the following elements in weight percentage: Ce is 9.00%, other impurity elements are ≤0.10%, and the rest is aluminum.

[0054] The above-mentioned high-conductivity and heat-resistant in-situ self-generated aluminum-based composite material in this embodiment can be prepared by the following method:

[0055] Step 1: select Al 99.9% industrial pure aluminum and place it in a smelting furnace to raise the temperature to 730° C. to melt into molten aluminum.

[0056] Step 2: Weigh the aluminum-cerium master alloy preparation raw material according to the Ce 9% composition, add the aluminum-cerium master alloy to the aluminum liquid prepared in the step 1, and use graphite rods to continuously stir, so that the cerium is evenly stirred, and a mixed melt is obtained.

[0057] Step 3, adding a deslagging and degassing a...

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Abstract

The invention provides a high-conductivity heat-resistant in-situ synthesized aluminum matrix composite material and a preparation method thereof. The aluminum matrix composite material comprises thefollowing elements, in percentage by weight, of 5.00%-15.00% of Ce and the balance aluminum. According to the aluminum matrix composite material, the aluminum is taken as a matrix, cerium and aluminumelements form an Al11Ce3 intermetallic compound, the intermetallic compound is good in thermal stability and is acted as a reinforcing body of the composite material to effectively improve the strength and heat resistance of the material, the cerium element is low in solid solubility in the aluminum and has the effect of purifying the aluminum matrix, so that the influence of the solid solution impurity element on the conductivity is reduced, and the conductivity of the composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a design and preparation method of a high-conductivity heat-resistant in-situ self-generated composite material. Background technique [0002] Aluminum matrix composites have the advantages of high specific strength, high specific stiffness, low density, small expansion coefficient, high temperature resistance, good thermal conductivity and fatigue resistance, and have broad application prospects in the aerospace industry, automobile and electronics industries. [0003] The introduction methods of reinforcement in composite materials include external addition method and in-situ self-generation method. In the preparation process of external reinforcement, there are problems such as poor wettability between reinforcement and matrix, interfacial reaction, and uneven dispersion of reinforcement. The gas and oxide film involved in the external addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/00C22F1/04
CPCC22C1/026C22C1/03C22C21/00C22F1/04
Inventor 高海燕张驰王朦朦李敏王宇飞王俊孙宝德
Owner SHANGHAI JIAO TONG UNIV
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