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Preparation of copper-based surface nano composite AgSnO2 electrical contact alloy

A nano-composite and electrical contact technology, applied in the field of material manufacturing, can solve the problems of low overall performance, achieve low cost, improve deposition efficiency, and simple methods

Inactive Publication Date: 2011-06-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The proposed copper-based electrical contact material scheme is to add other substances to copper, such as adding carbon fiber, graphite, diamond, boron carbide, rare earth metals, oxides and halides, etc. to copper. These schemes have effectively improved copper-based electrical contacts. The electrical and mechanical properties of the contact material, but its overall performance is still lower than that of silver-based alloys

Method used

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  • Preparation of copper-based surface nano composite AgSnO2 electrical contact alloy
  • Preparation of copper-based surface nano composite AgSnO2 electrical contact alloy
  • Preparation of copper-based surface nano composite AgSnO2 electrical contact alloy

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Experimental program
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Effect test

Embodiment 1

[0029] Take SnCl 4 Aqueous solution, add ammonia water dropwise, produce chemical co-precipitation, get SnO 2 The aqueous solution of the precursor of the nano-oxide is placed in an environment with a temperature of 60°C, dried, and then fired at a temperature of 400°C to obtain pure amorphous nano-SnO 2 powder. According to the weight ratio of 80:5, take micron-sized Ag powder and pure SnO respectively 2 Amorphous nano-powder is put into a high-energy ball mill for powder mixing, the ball-to-material ratio is 10:1, and the corresponding ball-milling time is 3 hours to obtain nanocomposite AgSnO 2Powder powder is sprayed by plasma. The specific spraying process parameters are: arc voltage 50V, arc current 400A, argon flow rate 2000L / h, hydrogen flow rate 1000L / h, powder feeding speed 15g / min, spraying distance 90mm. The prepared nanocomposite AgSnO 2 The powder is sprayed on the copper-based surface to form nanocomposite AgSnO 2 Electrical contact alloy, the surface scann...

Embodiment 2

[0031] SnCl 4 and FeCl 3 Aqueous solution, mixed evenly, ammonia water was added dropwise to produce chemical co-precipitation, and SnO containing doping element Fe was obtained. 2 Nano-oxide precursor aqueous solution, the atomic ratio of Sn to Fe in the precursor aqueous solution is 5:1, the precursor aqueous solution is placed in an environment with a temperature of 90 ° C, dried, and then, at a temperature of 600 ° C , fired to produce crystalline nano-SnO containing doping element Fe 2 powder. According to the weight ratio of 95:20, take micron-sized Ag powder and SnO containing doping element Fe respectively 2 The crystalline nano-powder is put into a high-energy ball mill for powder mixing, the ball-to-material ratio is 100:1, and the ball-milling time is 15 minutes to obtain nanocomposite AgSnO 2 powder. Plasma spraying is adopted, and the specific spraying process parameters are: arc voltage 75V, arc current 600A, argon flow rate 4000L / h, hydrogen flow rate 2000L...

Embodiment 3

[0033] SnCl 4 and LaCl 3 Aqueous solution, mix evenly, add ammonia water dropwise, produce chemical co-precipitation to obtain SnO containing doping elements 2 Nano-oxide precursor aqueous solution, the atomic ratio of Sn and La in the precursor aqueous solution is 5:3, the precursor aqueous solution is placed in an environment with a temperature of 75 ° C, dried, and then, at a temperature of 450 ° C , fired to produce amorphous nano-SnO containing doping elements 2 powder. According to the weight ratio of 88:12, the micron-sized Ag powder and the prepared SnO containing doping element La were respectively taken 2 Amorphous nano-powders were put into a high-energy ball mill for powder mixing, the ball-to-material ratio was 55:1, and the ball-milling time was 1 hour and 40 minutes to obtain nanocomposite AgSnO 2 powder. By plasma spraying, the nanocomposite AgSnO 2 The powder is sprayed on the copper-based surface to form nanocomposite AgSnO 2 For electrical contact all...

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Abstract

The invention discloses a preparation method of a nanometer compound AgSnO2 electric contact alloy on a copper-based surface; the nanometer compound AgSnO2 powder is manufactured through preparing a nanometer oxide; then a plasma spraying method is adopted for coating the nanometer compound AgSnO2 powder on the surface of a pure-copper or copper alloy substrate for preparing the nanometer compound AgSnO2 electric contact alloy. The performance of the electric contact alloy prepared by the method can achieve or exceed that of the AgSnO2 electric contact material prepared by the traditional powder metallurgy method, which not only makes up the defects of the performances of the copper-based electric contact alloy, but also saves the noble metal of silver; moreover, the method is simple and the operation is convenient, thus having broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of material manufacturing, and relates to a method for coating an electrical contact alloy on a copper-based surface, in particular to a copper-based surface nanocomposite AgSnO 2 Preparation method of electrical contact alloy. Background technique [0002] Silver-based alloys have become the preferred alloys for electrical contact materials because of their high electrical conductivity, high thermal conductivity, high welding resistance, non-oxidation under atmospheric conditions, and low and stable contact resistance. Among them, AgSnO 2 Alloy-based. However, silver is an expensive rare metal. In order to reduce the cost and consumption of silver, it is of great significance to research and develop electrical contact materials with low price and reliable performance. [0003] At present, the research and development of electrical contact materials mainly focus on the research of copper-based electrical c...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C5/06H01H1/02
Inventor 付翀王俊勃杨敏鸽贺辛亥陈立成杜志敏蒋百灵
Owner XI'AN POLYTECHNIC UNIVERSITY
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