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Anti-arc ablation material and preparation method and application thereof

An ablation material, anti-arc technology, applied in circuits, electrical switches, electrical components, etc., can solve the problems of contact resistance and mechanical wear performance not meeting the requirements of use well, and achieve improved wettability and contact resistance, The effect of improving strength and toughness and refining grains

Pending Publication Date: 2019-11-12
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the arc ablation resistance, contact resistance and mechanical wear performance of the electrical contact material cannot better meet the requirements of use under the condition of UHV and high current, Thereby providing a kind of anti-arc ablation material and its preparation method, application, by adding graphene, lanthanum and zirconium in copper tungsten base material, using graphene as interface phase to improve the wettability between two phases, lanthanum and zirconium Microscopic modification makes the material have high arc ablation resistance, low contact resistance and low mechanical wear under the condition of UHV and high current

Method used

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  • Anti-arc ablation material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides an anti-arc ablation material and its preparation method, the specific steps are:

[0038]Mixing of raw materials: Weigh 0.002g of graphene and add it into 0.2ml of ethanol to obtain a 10mg / ml graphene ethanol suspension, then mix it with 0.2ml of 0.5M polyvinyl butyral ethanol solution, and gradually add it under the condition of stirring at 8000rpm 80.78g tungsten powder, 0.01g lanthanum, 0.2g zirconium and 9.5g copper powder to obtain mixed powder;

[0039] Compact: vacuum-dry the mixed powder, pass through an 80-mesh sieve, and press into a steel mold with a pressing pressure of 500 MPa to obtain a compact;

[0040] Sintering: Heat the green compact to 185°C in an argon protection furnace and keep it for 30 minutes; then raise the temperature to 450°C and keep it for 30 minutes; then raise the temperature to 1400°C for sintering, keep it for 1.5 hours, and then cool it to room temperature to obtain a sintered compact;

[0041] Infiltration:...

Embodiment 2

[0043] This embodiment provides an anti-arc ablation material and its preparation method, the specific steps are:

[0044] Mixing of raw materials: Weigh 0.2g of graphene oxide and add it to 8ml of ethanol to obtain a 25mg / ml graphene ethanol suspension, then mix it with 16ml of 0.6M polyvinyl butyral ethanol solution, and gradually add 79.8 g tungsten powder, 0.004g lanthanum, 0.1g zirconium and 6g copper powder to obtain mixed powder;

[0045] Compact: the mixed powder is vacuum-dried, passed through a 90-mesh sieve, and pressed into a steel mold with a pressing pressure of 700 MPa to obtain a compact;

[0046] Sintering: Heat the green compact to 180°C in an argon protection furnace and keep it for 50 minutes; then raise the temperature to 400°C and keep it for 50 minutes; then raise the temperature to 1500°C for sintering, keep it for 2.5 hours, and then cool it to room temperature to obtain a sintered billet;

[0047] Infiltration: After cleaning the surface of the sinte...

Embodiment 3

[0049] This embodiment provides an anti-arc ablation material and its preparation method, the specific steps are:

[0050] Raw material mixing: Weigh 0.1g of reduced graphene oxide and add it to 5ml of ethanol to obtain a 20mg / ml graphene ethanol suspension, then mix it with 2.5ml of 0.4M polyvinyl butyral ethanol solution, and gradually Add 81.59g of tungsten powder, 0.008g of lanthanum, 0.3g of zirconium and 7.2g of copper powder to obtain a mixed powder;

[0051] Compact: vacuum-dry the mixed powder, pass through a 100-mesh sieve, and press into a steel mold with a pressing pressure of 600 MPa to obtain a compact;

[0052] Sintering: Heat the green compact to 175°C in an argon protection furnace and keep it for 40 minutes; then raise the temperature to 500°C and keep it for 40 minutes; then raise the temperature to 1400°C for sintering, keep it for 2 hours, and then cool it down to room temperature to get a sintered billet;

[0053] Infiltration: After cleaning the surface...

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Abstract

The invention provides an anti-arc ablation material and a preparation method and application thereof. The anti-arc ablation material comprises the following components of, in percentage by mass, 0.002%-0.2% of grapheme, 0.004%-0.01% of lanthanum, 0.1%0.3% of zirconium, 18%-20% of copper, and the balance tungsten. According to the method, the graphene, the lanthanum and the zirconium are added andthe contents of the grapheme, the lanthanum and the zirconium are limited, the graphene precursor is prepared in a chemical co-deposition mode, then the graphene precursor is mixed with Cu, W, the lanthanum and the zirconium to obtain mixed powder, and furthermore, the powder forming and a mode of combining sintering and infiltration processes are adopted, the material is enabled to have high electric arc ablation resistance, low contact resistance and low mechanical abrasion loss, and meanwhile good lasting strength under the extra-high-voltage and high-current working conditions.

Description

technical field [0001] The invention relates to the field of electrical materials, in particular to an anti-arc ablation material and its preparation method and application. Background technique [0002] With the rapid development of modern industry, the load of high-voltage transmission and transformation circuits is increasing day by day. Under the action of high voltage and high current, arc ablation will cause serious corrosion pits on the surface of traditional high-voltage electrical contact materials and cause failure. [0003] At present, my country's 110kV and above high-voltage and ultra-high voltage power transmission and transformation systems are dominated by SF6 circuit breakers, but its reliability has become a bottleneck for the upgrading of my country's power grid industry. According to the statistics of the Transportation Inspection Department of the State Grid Corporation, during the three years from 2013 to 2015, there were 109 fault trips in the company'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/05H01H11/04
CPCC22C27/04C22C1/05H01H11/048B22F2998/10B22F1/10B22F3/26B22F3/1007B22F3/02
Inventor 丁一祝志祥周明瑜陈新陈保安张强韩钰王强
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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