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Method for preparing binary metal-base composite material with layered gradient change

A technology of composite materials and binary metals, which is applied in the field of preparation of binary metal matrix composites, can solve the problems of slow deposition speed and low preparation efficiency, and achieve the effects of high preparation efficiency, simple operation and controllable operation

Inactive Publication Date: 2009-10-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the physical vapor deposition method can easily prepare the deposited film of multi-layer substances, but this method can only obtain thin deposited films, and the deposition rate is relatively slow; Quantity changes, and then to obtain a continuous gradient sediment body, this method requires the selection of a suitable dispersant to meet the material's settling requirements, and the preparation efficiency is low; the rolling composite method is to make the metal plate under the strong pressure of the rolling mill , Plastic deformation occurs on the surface of the two-layer metal to be compounded, so that the surface metal layer is broken to produce a clean and activated metal layer to achieve a planar metallurgical bond under strong pressure, but sometimes a super-powerful rolling mill is required to meet the compounding requirements

Method used

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  • Method for preparing binary metal-base composite material with layered gradient change
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  • Method for preparing binary metal-base composite material with layered gradient change

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preparation example Construction

[0020] The invention is a method for preparing a binary metal matrix composite material with layered gradient changes, which includes the following preparation steps:

[0021] Step 1: Prepare raw materials

[0022] Use a grading sieve to screen A powder and B powder to obtain A powder and B powder with a particle size difference of 10-40 μm; then mix A powder and B powder mechanically, and vacuum at 50-85°C The raw materials are obtained after drying in a drying oven for 30-120 minutes;

[0023] The second step: Spraying the binary metal matrix composite with layered gradient change

[0024] Put the raw material obtained in the first step into the powder feeder 2 of the spraying equipment, adjust the spraying process parameters, and prepare a binary metal matrix composite material with layered gradient changes at a room temperature of 18-25°C;

[0025] The spraying process parameters are: the working temperature of the spray gun 1 is 50-250°C, the working pressure of the spr...

Embodiment 1

[0028] Example 1: Preparation of Al-Fe Composite Materials

[0029] Step 1: Prepare raw materials

[0030] Select aluminum powder (A powder) with an average particle size of 10 μm, select iron powder (B powder) with an average particle size of 40 μm, and the density of the aluminum powder is 2.70 g / cm 3 , the density of iron powder is 7.86g / cm 3 .

[0031] Then, the aluminum powder and iron powder were mechanically mixed and dried in a vacuum oven at 85°C for 30 minutes to obtain raw materials;

[0032] The second step: Spraying Al-Fe composite material with layered gradient change

[0033] Put the raw materials obtained in the first step into the powder feeder 2 of the spraying equipment, adjust the spraying process parameters, and prepare a binary metal matrix composite material with layered gradient changes at a room temperature of 25°C;

[0034] The spraying process parameters are: the working temperature of the spray gun 1 is 200°C, the working pressure of the spray...

Embodiment 2

[0037] Example 2: Al-Ti Composite Material

[0038] Step 1: Prepare raw materials

[0039] Select aluminum powder (A powder) with an average particle size of 20 μm, select titanium powder (B powder) with an average particle size of 60 μm, and the density of the aluminum powder is 2.70 g / cm 3 , the density of titanium powder is 4.54g / cm 3 .

[0040] Then, the aluminum powder and titanium powder were mechanically mixed, and then dried in a vacuum oven at 50°C for 120 minutes to obtain raw materials;

[0041] The second step: Spraying Al-Ti composite material with layered gradient change

[0042] Put the raw materials obtained in the first step into the powder feeder 2 of the spraying equipment, adjust the spraying process parameters, and prepare a binary metal matrix composite material with layered gradient changes at a room temperature of 18°C;

[0043] The spraying process parameters are: the working temperature of the spray gun 1 is 100°C, the working pressure of the sp...

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Abstract

The invention discloses a method for preparing a binary metal matrix composite material with layered gradient changes. By adjusting the spraying process parameters: the working temperature of the spray gun (1) is 50-250°C, and the working pressure of the spray gun (1) is 0.3 ~0.8MPa, the moving speed of the spray gun (1) is 25~50mm / s, the distance h between the outlet of the spray gun (1) and the substrate (4) is 5~20mm; the powder feeding amount of the powder feeder (2) is 7 ~15g / min. The composite material with layered structure distribution can be prepared at one time by adopting the preparation method of the present invention, and the A powder and the B powder in the single layer of the composite material are different in density and particle size, so that the A powder is first deposited on the substrate , B powder component content is deposited on A powder in a continuous gradient change.

Description

technical field [0001] The invention relates to a method for preparing a binary metal matrix composite material with layered gradient changes. Background technique [0002] With the development of science and technology and modern industrial technology, people have higher and higher requirements for material performance. In order to make better use of the advantages of various materials, the research and preparation of new composite materials has become an important branch in the field of materials science and engineering. Gradient composite material means that the composition and structure of the material present a gradient change, which can meet the needs of different functions in different parts of a single material device, thereby optimizing the overall performance of the device. [0003] At present, the methods for preparing gradient composite materials include physical vapor deposition (PVD), co-sedimentation, powder metallurgy, centrifugal casting, and rolling compou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
Inventor 逄淑杰焦立波田刚张涛马朝利
Owner BEIHANG UNIV