Electrical contact material with Ti3SiC2 multi-layer compound structure and preparation technique

Abstract

The invention aims at providing an electric contact material Ti3SiC2 and a preparation method used for the electric contact material Ti3SiC2, wherein, the electric contact material Ti3SiC2 is provided with a multi-layer composite structure with self-lubrication performance and has the advantages of high-strength, high conductivity, high thermal conductivity, melt welding resistance and electric arc burning resistance. The electric contact material Ti3SiC2 with the multi-layer composite structure is composed of four layers as follows: the first layer (surface layer) is Ti3SiC2 of 3 to 1000 microns thick, the second layer (auxiliary layer) is a silver-based alloy of 1 to 500 microns thick, the third layer (substrate) is a copper-based alloy and the fourth layer (welding layer) is solder of 0.03 to 0.10mm thick. The invention discloses the electric contact material Ti3SiC2 with the multi-layer composite structure, which adopts reasonable configuration of multi-layers of the Ti3SiC2 / silver-based alloy / copper based alloy / solder, takes the TiSiC2 layer as the surface layer, and has the excellent characteristics such as high strength, good conductivity, good thermal conductivity, good melt welding resistance, good electric arc burning resistance, good corrosion resistance, good thermal-vibration resistance, good oxidation resistance and particularly good high-temperature oxidation resistance, etc.

Description

(1) Technical field [0001] The invention relates to a powder metallurgy material, specifically a Ti3SiC2 multilayer composite structure electrical contact material and a preparation process thereof. (2) Background technology [0002] In recent years, various series of new molded case circuit breakers and small high-voltage circuit breakers have been continuously introduced at home and abroad. These new circuit breakers are smaller in size but have greatly improved breaking capacity. In addition to adopting a series of new current-limiting technologies to improve the breaking capacity, the new circuit breaker puts forward higher requirements on the anti-welding resistance, arc burning resistance and electrical life of the electrical contacts used. [0003] Among the currently published 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 c...

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. Under certain working conditions, the performance cannot meet the special requirements of high-end new electrical products.

The cost of copper-based electrical contact materials with copper as the main component is low. Although the electrical performance can meet the requirements of use, it still needs to be improved.