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Aluminium-in situ titanium boride composite powder

A technology of composite powder and titanium boride, which is applied in the field of powder materials, aluminum-in-situ titanium boride composite powder, can solve the problems of difficult control of interface reaction, poor interface bonding, poor wettability between reinforcing particles and matrix, and achieve wettability Good performance, clean interface, combined with good effects

Inactive Publication Date: 2007-07-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, to provide an aluminum-in-situ titanium boride composite powder material, so that it can solve the defects of poor wettability between the reinforcing particles and the matrix, difficult control of the interface reaction, and poor interface bonding. Composite materials have higher mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The components and their mass percentages of the invention are: 99.9% of Al, 0.1% of titanium boride reinforcing particles. Add industrial pure aluminum into the crucible to melt the aluminum ingot and raise the temperature to 850-1100°C; 4 、K 2 TiF 6 Mix evenly, dry, then add the mixed salt into the melt, and carry out mechanical stirring. After the reaction, take out the slag, add alloy elements, degas and refine, remove the scum, and put the melt in the atomizer Atomized into powder by high-pressure inert gas.

[0014] The size of the aluminum-in-situ titanium boride composite powder is 5-60 μm, the size of the titanium boride particles in the aluminum-in-situ titanium boride composite powder is 50-250 nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are dispersed in the In the aluminum matrix, the interface between titanium boride and the matrix is ​​clean, there is no interface reaction, and the combination is good.

Embodiment 2

[0016] The components and their mass percentages of the invention are: 80% Al, 20% titanium boride reinforcing particles. Add industrial pure aluminum into the crucible to melt the aluminum ingot and raise the temperature to 850-1100°C; 4 、K 2 TiF 6 Mix evenly, dry, then add the mixed salt into the melt, and carry out mechanical stirring. After the reaction, take out the slag, add alloy elements, degas and refine, remove the scum, and put the melt in the atomizer Atomized into powder by high-pressure inert gas.

[0017] The size of the aluminum-in-situ titanium boride composite powder is 5-60 μm, the size of the titanium boride particles in the aluminum-in-situ titanium boride composite powder is 50-250 nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are dispersed in the In the aluminum matrix, the interface between titanium boride and the matrix is ​​clean, there is no interface reaction, and the combination is good.

Embodiment 3

[0019] The components and their mass percentages of the invention are: 60% of Al, 40% of titanium boride reinforcing particles. Add industrial pure aluminum into the crucible to melt the aluminum ingot and raise the temperature to 850-1100°C; 4 、K 2 TiF 6 Mix evenly, dry, then add the mixed salt into the melt, and carry out mechanical stirring. After the reaction, take out the slag, add alloy elements, degas and refine, remove the scum, and put the melt in the atomizer Atomized into powder by high-pressure inert gas.

[0020] The size of aluminum-in-situ titanium boride composite powder is 5-60 μm, the size of titanium boride particles in aluminum-in-situ titanium boride composite powder is 50-300nm, the particle shape is mainly hexagonal and cuboid, and the particles are dispersed in In the matrix, the interface between titanium boride and the matrix is ​​clean, there is no interface reaction, and the combination is good.

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Abstract

The present invention discloses an aluminium-in-situ titanium boride composite powder, belonging to the field of material technology. Its composition includes (mass%) 60-99.9% of aluminium and 0.1-40% of titanium boride reinforced granules. The described powder grain size is 5-60 micrometers, and the grain size of the described titanium boride reinforced granules is 50-300 nm, and the granule form is hexagonal form or rectangular paralleling. In the powder metallurgy said invention can raise mechanical property of composite material.

Description

technical field [0001] The invention relates to a powder material in the technical field of composite materials, in particular to an aluminum-in-situ titanium boride composite powder. Background technique [0002] Aluminum matrix composites have high specific strength, high specific modulus and high specific stiffness, and are widely used in aerospace, national defense, industry and other fields. Powder metallurgy is one of the main preparation processes of aluminum matrix composites. The commonly used powder metallurgy preparation process is to add reinforcing particles to the aluminum matrix to prepare aluminum matrix composites. There are defects such as poor wettability between reinforcing particles and the matrix, difficult to control interface reaction, and poor interface bonding, which affects the performance of aluminum matrix composites. . Adding aluminum-in-situ self-generated particle composite powder can solve this problem well. The in-situ self-generated rein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
Inventor 陈东王浩伟孙焕焕李险峰马乃恒
Owner SHANGHAI JIAO TONG UNIV
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