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 t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1:

[0019] (1) Silicon carbide whiskers: 1.5kg; silver-copper alloy powder containing 1kg of silver: 10kg and electrolytic copper powder: 88.5kg in an argon atmosphere, ball milled 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) Cold isostatically press the obtained mixed powder with a cold isostatic press at 250MPa into a cylindrical blank with a diameter of 50mm;

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

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

[0023] (5) The re-compressed billet is re-fired at 800°C in an argon atmosphere, and the sintering temperature is 2 hours;

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

[0025] (7) The plates are aged in ...

Example Embodiment

[0027] Example 2

[0028] (1) Zinc oxide whisker powder: 50kg; 30kg of lanthanum-containing copper-lanthanum alloy powder: 200kg and electrolytic copper powder: 750kg ball milled on a high-energy ball mill for 8 hours under an argon atmosphere 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) Cold isostatically press the obtained mixed powder with a cold isostatic press at 280MPa into a cylindrical blank with a diameter of 50mm;

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

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

[0032] (5) The re-pressed billet is re-fired at 860°C in an argon atmosphere, and the sintering temperature is 1.3 hours;

[0033] (6) The refired billet is hot-extruded at 800°C into a plate;

[0034] (7) The plates ...

Example Embodiment

[0036] Example 3

[0037] (1) Zinc oxide whisker: 0.5kg; copper-tellurium alloy powder containing 0.4kg of tellurium: 10kg; lanthanum-copper alloy powder containing 0.3kg of lanthanum: 10%; aluminum-containing 0.1kg copper-aluminum alloy powder: 10kg; containing zirconium 0.05 kg of copper-zirconium alloy powder: 10kg and 59.5kg of electrolytic copper powder are milled on a high-energy ball mill for 9 hours under an argon atmosphere to obtain a uniform mixed powder; the electrolytic copper powder, copper, tellurium, gold, and lanthanum copper alloy powder The average particle size of copper-aluminum alloy powder and copper-zirconium alloy powder is -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) Cold isostatically press the obtained mixed powder with a cold isostatic press at 280MPa into a cylindrical blank with a diameter of 50mm;

[0039] (3) Sinter th...

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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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