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Whisker reinforced copper-based electrical contact material and preparation method thereof

An electrical contact material and whisker technology, applied in the field of copper-based electrical contact materials and preparation, can solve the problem of high cost and achieve the effects of good electrical conductivity and high strength

Active Publication Date: 2012-04-25
哈尔滨东大高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silver-based electrical contact material with silver as the main component has good electrical properties and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Silicon carbide whiskers: 1.5kg; silver-copper alloy powder containing 1kg of silver: 10kg and electrolytic copper powder: 88.5kg. Under an argon protective atmosphere, ball mill on a high-energy ball mill for 6 hours to obtain a uniform mixed powder; The average particle size of the electrolytic copper powder and silver-copper alloy powder is -200 mesh; the silver-copper alloy powder is made by water atomization;

[0020] (2) the obtained mixed powder is cold isostatically pressed into a diameter of 50mm cylinder blank under 250MPa with a cold isostatic press;

[0021] (3) Sinter the cylindrical blank under an argon protective atmosphere for 1 hour at a temperature of 1000°C;

[0022] (4) The sintered blank is repressed under a pressure of 500 tons;

[0023] (5) The repressed blank is refired at 800°C under an argon protective atmosphere, and the sintering temperature is 2 hours;

[0024] (6) The billet after reburning is hot-extruded into a plate at 700°C;

[0...

Embodiment 2

[0028] (1) Zinc oxide whisker powder: 50kg; copper-lanthanum alloy powder containing lanthanum 30kg: 200kg and electrolytic copper powder: 750kg. Under an argon protective atmosphere, ball mill on a high-energy ball mill for 8 hours to obtain a uniform mixed powder; The average particle size of the electrolytic copper powder and copper-lanthanum alloy powder is -200 mesh; the copper-lanthanum alloy powder is made by water atomization;

[0029] (2) the obtained mixed powder is cold isostatically pressed into a diameter of 50mm cylinder blank under 280MPa with a cold isostatic press;

[0030] (3) Sinter the cylindrical blank under an argon protective atmosphere for 2 hours at a temperature of 90°C;

[0031] (4) The sintered blank is repressed under a pressure of 550 tons;

[0032] (5) The repressed billet is refired at 860°C under an argon protective atmosphere, and the sintering temperature is 1.3 hours;

[0033] (6) The billet after reburning is hot-extruded into a plate at ...

Embodiment 3

[0037] (1) Zinc oxide whiskers: 0.5kg; copper-tellurium alloy powder containing 0.4kg tellurium: 10kg; lanthanum-copper alloy powder containing lanthanum 0.3kg: 10%; copper-aluminum alloy powder containing 0.1kg aluminum: 10kg; zirconium 0.05 kg of copper-zirconium alloy powder: 10kg and 59.5kg of electrolytic copper powder were ball milled on a high-energy ball mill for 9 hours under an argon protective atmosphere to obtain a uniform mixed powder; the electrolytic copper powder, copper-tellurium gold powder, and lanthanum-copper alloy powder , copper-aluminum alloy powder and copper-zirconium alloy powder with an average particle size of -200 mesh; copper-tellurium-gold powder, lanthanum-copper alloy powder, copper-aluminum alloy powder and copper-zirconium alloy powder are made by water atomization;

[0038] (2) the obtained mixed powder is cold isostatically pressed into a diameter of 50mm cylinder blank under 280MPa with a cold isostatic press;

[0039] (3) Sinter the cyli...

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Abstract

The invention provides a whisker reinforced copper-based electrical contact material. The material comprises electrolytic copper powder, copper alloy powder and silicon carbide whiskers or tetra-needle like zinc oxide whiskers, wherein the copper alloy powder contains one or any composition of aluminium, zirconium, tellurium, silver, titanium, boron and rare-earth elements. A preparation method of the material comprises the following steps: proportionally mixing the whiskers with the electrolytic copper powder and copper alloy powder and ball-milling the mixture on a high energy ball mill under the protective atmosphere of argon to obtain uniform mixed powder; carrying out cold isostatic pressing on the obtained mixed powder to obtain a cylindrical blank; sintering the cylindrical blank under the protective atmosphere of argon; repressing the sintered blank; resintering the repressed blank under the protective atmosphere of argon; carrying out hot extrusion on the resintered blank to form a plate; carrying out aging treatment on the plate under the protective atmosphere of argon; and rolling or drawing the section subjected to aging treatment and then blanking the section according to the product size. The electrical contact material has the advantages of good electrical conductivity, thermal conductivity, fusion welding resistance, arc ablation resistance and corrosion resistance and especially good high-temperature oxidation resistance.

Description

technical field [0001] The invention relates to the technical field of electrical contact materials, in particular to a copper-based electrical contact material and a preparation method. Background technique [0002] Among the currently published contact patents and contact materials being used, one is a silver-based electrical contact material with silver as the main component, and the other is a copper-based electrical contact material with copper as the main component. The silver-based electrical contact material with silver as the main component has good electrical properties and high cost. Copper-based electrical contact materials with copper as the main component are low in cost, and their electrical properties are not as good as silver-based contacts. In today's world where more and more contacts are used, the amount of silver used for contacts is increasing year by year, and there is an urgent need for an electrical contact material that can completely replace silv...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B13/00
Inventor 倪树春王英杰杨丛涛刘新志何肖冰
Owner 哈尔滨东大高新材料股份有限公司
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