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Method for preparing alumina dispersion-strenghtened copper-base composite material

A technology for dispersion-strengthened copper and composite materials, applied in the field of preparation of alumina dispersion-strengthened copper-based composite materials, can solve the problems of high cost, limitation of wide application of excellent composite materials, difficult quality control, etc. Complete oxidation, favorable for concentrated diffusion, and the effect of increasing the rate

Inactive Publication Date: 2008-09-10
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current preparation method is to atomize the copper-aluminum alloy into powder and then carry out internal oxidation, and then adopt powder metallurgy method to form; its production process is complicated, the cycle is long, and the quality is difficult to control, which leads to high cost and limits Wide range of applications of this superior composite material

Method used

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  • Method for preparing alumina dispersion-strenghtened copper-base composite material

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Experimental program
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Effect test

Embodiment 1

[0035] 99g of copper powder and 1g of aluminum powder were ball milled in a high-energy ball mill for 4 hours, the ball-to-material ratio was 30:1, and the ball mill speed was 400 rpm to make copper-aluminum pre-alloy powder; then add 2g of cuprous oxide powder and copper Aluminum pre-alloy powders were ball milled together for 3 hours, the ball-to-material ratio was 30:1, and the speed of the ball mill was 400 rpm to make composite powders; the composite powders were cold-pressed to make compacts; then the compacts were put into high-purity graphite for In the vacuum furnace of the heating body, first evacuate to 0.5×10 -2 Pa, use a heating rate of 10°C / min to rise to 400°C, use a heating rate of 20°C / min to rise to 800°C, then use a heating rate of 5°C / min to rise to 950°C, and keep at this temperature for 3 hours. During this process, the temperature control is automatically realized through the instrument program; then the sintered green compact is first subjected to hot e...

Embodiment 2

[0037] Mill 99.75g of copper powder and 0.25g of aluminum powder in a high-energy ball mill for 3 hours, the ball-to-material ratio is 40:1, and the ball mill speed is 300 rpm to make copper-aluminum pre-alloyed powder; then add 0.5g of cuprous oxide The powder is ball milled with copper-aluminum pre-alloy powder for 2 hours, the ball-to-material ratio is 40:1, and the speed of the ball mill is 300 rpm to make a composite powder; the composite powder is cold-pressed to make a compact; then the compact is placed in a high In the vacuum furnace with pure graphite as the heating body, the temperature measuring thermocouple directly measures the surface temperature of the sample, and first vacuumizes to 1.0×10 -3 Pa, using a heating rate of 20°C / min to rise to 900°C, and keep warm at this temperature for 0.5 hours. During this process, the temperature control is automatically realized through the instrument program; then the sintered compact is first carried out at 750°C for 5: 1 ...

Embodiment 3

[0039] 99.35g of copper powder and 0.65g of aluminum powder were ball milled in a high-energy ball mill for 3.5 hours, the ball-to-material ratio was 35:1, and the ball mill speed was 350 rpm to make copper-aluminum pre-alloy powder; then 1.3g of cuprous oxide was added The powder is ball milled with copper-aluminum pre-alloy powder for 2.5 hours, the ball-to-material ratio is 35:1, and the speed of the ball mill is 350 rpm to make a composite powder; the composite powder is cold-pressed to make a compact; then the compact is put into a vacuum In the furnace, the temperature measuring thermocouple directly measures the surface temperature of the sample, and first vacuumizes to 0.2×10 -2 Pa, use a heating rate of 10 °C / min to rise to 400 °C, use a heating rate of 20 °C / min to 850 °C, and then use a heating rate of 5 °C / min to 1000 °C, keep at this temperature for 1 hour, During this process, the temperature control is automatically realized through the instrument program; then ...

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Abstract

The invention discloses a method to make alumina dispersion strengthening copper base composite material that includes the following steps: making copper-aluminum prealloying powder through high energy ball milling method, making the composite powder of copper plating powder and copper-aluminum prealloying powder through high energy ball milling method; cold press molding the powder, taking sintering and internal operation in vacuum furnace, after two times of hot extrusion, the material would be gained. The method has the advantages of simple technology, low cost, etc.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a method for preparing aluminum oxide dispersion-strengthened copper-based composite materials. Background technique [0002] Precipitation-hardening copper alloys (Cu-Cr, Cu-Cr-Zr, etc.) Copper alloy has high strength, good electrical and thermal conductivity. However, the disadvantage of these alloys is that if the use temperature is higher than the original precipitation heat treatment temperature (1 / 3 to 1 / 2 of the copper melting point) for a long time, the strength and electrical and thermal conductivity of the copper alloy will be greatly reduced, and the actual parts of these parts The working temperature often exceeds this temperature range, which leads to a sharp reduction in the service life of materials and a decrease in the stability of instruments and equipment. Therefore, it is urgent to develop a material with high strength and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C45/00B22F9/04B22F3/16
Inventor 梁淑华肖鹏范志康
Owner XIAN UNIV OF TECH
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