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Method for preparing (TiB2+TiC) dispersion-strengthened copper-based composite material by mechanical alloying

A technology of copper-based composite materials and dispersion-strengthened copper, which is applied in the production and preparation of high-strength and high-conductivity copper-based composite materials, and in the field of preparation of dispersion-strengthened copper-based composite materials, which can solve the problems of many preparation processes, complex preparation processes, and high production costs. Achieve the effects of simple process, shortened process route and low production cost

Inactive Publication Date: 2010-07-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiB 2 and the preparation process of TiC ultrafine powder is relatively complicated, resulting in (TiB 2 +TiC) dispersion-strengthened metal matrix composites have more preparation procedures and higher production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Cu powder, Ti powder and B with a particle size of 150 mesh and a purity of 99.9% 4 C powder is used as raw material, and Ti powder and B 4 C powder is uniformly mixed at a molar ratio of 3:1; put the steel ball and mixed powder with a ball-to-battery ratio of 20:1 into a high-energy ball mill ball mill tank in a glove box filled with argon, so that the ball-to-material mixture accounts for 15% of the volume of the inner cavity of the ball milling tank; perform high-energy ball milling on the ball material mixture at 1000 rpm at room temperature for 6 hours; add a certain amount of Cu powder to the ball milling tank in an argon atmosphere to make Ti The mass ratio between powder + C powder and Cu powder reaches 5:95; the mixed powder with Cu powder is continuously ball milled with high energy at 1000 rpm for 3 hours; the powder is taken out and cold pressed into a cylinder; at 800°C Sintered in an argon atmosphere resistance furnace at temperature for 3 hours t...

Embodiment 2

[0014] Example 2: Cu powder, Ti powder and B with a particle size of 200 mesh and a purity of 99.9% 4 C powder is used as raw material, and Ti powder and B 4 C powder is uniformly mixed according to 3:1 (mole); put the steel ball and mixed powder with a ball-to-battery ratio of 40:1 into the ball mill tank of a high-energy ball mill in a glove box filled with argon, so that the ball-to-material mixture occupies the ball mill 25% of the volume of the tank cavity; high-energy ball milling of the ball material mixture at room temperature at 1500 rpm for 12 hours; adding a certain amount of Cu powder to the ball milling tank in an argon atmosphere to make Ti powder +B 4 The mass ratio between C powder and Cu powder reaches 15:85; the mixed powder with Cu powder is continuously ball-milled at 1500 rpm for 6 hours; the powder is taken out and cold pressed into a cylinder; at a temperature of 900°C Sintered in an argon atmosphere resistance furnace for 2 hours to obtain an average part...

Embodiment 3

[0015] Example 3: Cu powder, Ti powder and B with a particle size of 300 mesh and a purity of 99.9% 4 C powder is used as raw material, and Ti powder and B 4 C powder is uniformly mixed at a ratio of 3:1 (mole); put the steel ball with a ball-to-battery ratio of 80:1 and the mixed powder into the high-energy ball mill ball mill tank in a glove box filled with argon, so that the ball material mixture occupies the ball mill 35% of the volume of the inner cavity of the tank; high-energy ball milling of the ball mixture at room temperature at 2000 rpm for 18 hours; adding a certain amount of Cu powder to the ball milling tank in an argon atmosphere to make Ti powder +B 4 The mass ratio between C powder and Cu powder reaches 20:80; the mixed powder with Cu powder is continuously ball milled at 2000 rpm for 9 hours; the powder is taken out and cold pressed into a cylinder; at a temperature of 1000°C Sintered in an argon atmosphere resistance furnace for 1 hour to obtain (TiB) with an ...

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Abstract

The invention discloses a method for preparing a (TiB2+TiC) dispersion-strengthened copper-based composite material by mechanical alloying. The method uses Cu powder, Ti powder and B4C powder with the particle size of less than 100 meshes and the purity of over 99 percent as raw materials and comprises the following steps: mixing the Ti powder and the B4C powder in a molar ratio 3 to 1 and performing high-energy ball milling on the mixed powder at room temperature for 2 to 20 hours; then adding a certain proportion of Cu powder into the mixed powder after the ball milling to ensure that the mass ratio of the Ti+B4C powder to the Cu powder is 1:99-20:80; performing high-energy ball milling on the new mixed powder added with the Cu powder at room temperature for 2 to 10 hours; performing cold-press molding on the mixed powder after the ball milling; and finally sintering pressed blanks in an argon protective atmosphere resistance furnace at the temperature of between 800 and 1,000 DEG C for 1 to 3 hours to obtain the TiB2+TiC dispersion-strengthened copper-based composite material with the average particle size of between 5 and 10 mu m. Through the simple high-energy ball-milling mechanical-alloying method adopted by the invention, the (TiB2+TiC) dispersion-strengthened copper-based composite material is prepared by synthesizing the pure Cu powder, Ti powder and B4C powder; and the method has the advantages of simple process, low production cost, high product yield, high product quality and the like.

Description

Technical field [0001] The present invention belongs to the technical field of preparation of metal matrix composite materials, and provides a preparation (TiB 2 +TiC) The method of dispersion strengthened copper-based composite materials can be used in the production and preparation of high-strength and high-conductivity copper-based composite materials widely used in the power industry, defense industry, integrated circuits, welding equipment and other fields. Background technique [0002] High-strength and high-conductivity copper alloys are structural and functional materials with excellent comprehensive physical and mechanical properties. They play an irreplaceable role in many industrial fields. They are widely used in lead frame ports of integrated circuits, various spot welding and seam welding machines. Electrodes, high-power asynchronous traction motor rotors, electrified railway contact wires, thermonuclear experimental reactor (ITER) divertor vertical target heat sink ...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C9/00
Inventor 李才巨朱心昆赵昆渝陶静梅陈铁力
Owner KUNMING UNIV OF SCI & TECH
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