Silver and chrome-based electric contact self-lubricating composite material and preparation method thereof

A composite material and electrical contact technology, which is applied in the direction of cable/conductor manufacturing, circuit, electrical components, etc., can solve the problems of no related reports, etc., and achieve the effects of strong operability, no pollution to the environment, and excellent mechanical properties

Inactive Publication Date: 2016-11-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, there is no relevant report on silver-chromium-based electrical contact composites containing chromium and silver-coated niobium diselenide as a solid lubricant and chromium as a strengthening phase.

Method used

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  • Silver and chrome-based electric contact self-lubricating composite material and preparation method thereof
  • Silver and chrome-based electric contact self-lubricating composite material and preparation method thereof
  • Silver and chrome-based electric contact self-lubricating composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A silver-chromium-based electrical contact self-lubricating composite material, comprising 55% by mass of silver, 15% by mass of chromium, and 30% by mass of niobium diselenide. Its preparation method comprises the following steps:

[0035] S1, nano niobium diselenide (NbSe 2 ) powder added to 0.4mol / L silver nitrate (AgNO 3 ) in the solution for ultrasonic dispersion for 1 h, put it into an oven for drying; put the dried powder into Al 2 o 3 In the burning boat, put it into a high-temperature diffusion furnace with H2 and heat it to 200 ° C for 1 hour to prepare silver-coated nano-niobium diselenide;

[0036] S2, mixing silver powder, chromium powder, and silver-coated nano-niobium diselenide prepared in step S1 according to the mass percentage ratio to prepare a mixed material;

[0037] S3, the above-mentioned mixed materials and stainless steel balls are proportioned according to the mass ratio of 1:10, sealed and placed in the stainless steel ball mill tank of t...

Embodiment 2

[0043] A silver-chromium-based electrical contact self-lubricating composite material, comprising 60% by mass of silver, 15% by mass of chromium, and 25% by mass of niobium diselenide. Its preparation method comprises the following steps:

[0044] S1, nano niobium diselenide (NbSe 2 ) powder added to 0.4mol / L silver nitrate (AgNO 3 ) in the solution for ultrasonic dispersion for 1 h, put it into an oven for drying; put the dried powder into Al2 o 3 In the burning boat, put it into a high-temperature diffusion furnace with H2 and heat it to 200 ° C for 1 hour to prepare silver-coated nano-niobium diselenide;

[0045] S2, mixing silver powder, chromium powder, and silver-coated nano-niobium diselenide prepared in step S1 according to the mass percentage ratio to prepare a mixed material;

[0046] S3, the above-mentioned mixed materials and stainless steel balls are proportioned according to the mass ratio of 1:10, sealed and placed in the stainless steel ball mill tank of the...

Embodiment 3

[0052] A silver-chromium-based electrical contact self-lubricating composite material, comprising 65% by mass of silver, 20% by mass of chromium, and 15% by mass of niobium diselenide. Its preparation method comprises the following steps:

[0053] S1, nano niobium diselenide (NbSe 2 ) powder added to 0.4mol / L silver nitrate (AgNO 3 ) in the solution for ultrasonic dispersion for 1 h, put it into an oven for drying; put the dried powder into Al 2 o 3 In the burning boat, put it into a high-temperature diffusion furnace with H2 and heat it to 200 ° C for 1 hour to prepare silver-coated nano-niobium diselenide;

[0054] S2, mixing silver powder, chromium powder, and silver-coated nano-niobium diselenide prepared in step S1 according to the mass percentage ratio to prepare a mixed material;

[0055] S3, the above-mentioned mixed materials and stainless steel balls are proportioned according to the mass ratio of 1:10, sealed and placed in the stainless steel ball mill tank of t...

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Abstract

The invention belongs to the technical field of electric conduction materials and discloses a silver and chrome-based electric contact self-lubricating composite material and a preparation method thereof. The silver and chrome-based electric contact self-lubricating composite material comprises, by mass, 50%-70% of silver, 5%-35% of chrome and 10%-30% of niobium diselenide. The novel electric contact composite material suitable for different working environments is prepared from an evenly-mixed powder material through the steps of powder wrapping, mixing, pressing molding, sintering, and repressing and re-sintering. The silver-wrapping niobium diselenide of a laminated structure serves as a lubrication phase of the electric contact composite material. Through addition of the chrome, the strength, hardness and corrosion resistance of the electric contact composite material can be improved. The composite material has excellent mechanical properties, friction properties and electrical properties. The process is simple, no pollution to the environment is caused in the production process, operability is high, and the finished composite material can be widely applied to the fields of transportation, metallurgy, shipbuilding, machines, electric power, aviation and the like as an electric contact material.

Description

technical field [0001] The invention belongs to the technical field of conductive materials, and relates to a composite material, in particular to a silver-chrome-based electric contact self-lubricating composite material and its preparation method and application. Background technique [0002] Electrical contact materials (including silver-based electrical contact materials and copper-based electrical contact materials) are the key to electrical alloys [0003] Functional materials are used for high and low voltage switch contacts, collector rings of generators, contacts of relays, etc. Their performance directly affects the technical level of power generation equipment and power transmission and transformation equipment. Silver-based electrical contacts are widely used in various low-voltage electrical appliances, and are the core components of low-voltage electrical appliances. They are widely used in power distribution systems, household appliances, transportation and co...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C5/06C22C32/00B22F1/02H01B13/00
CPCH01B13/00C22C1/05C22C5/06C22C32/0089B22F2998/10B22F1/17B22F3/10B22F3/02B22F2009/043
Inventor 施琴李长生张帅李剑锋
Owner JIANGSU UNIV
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