A kind of gold-ceramic electrical contact composite material and preparation method thereof

Abstract

The invention discloses a gold-ceramic electrical contact composite material and a preparation method thereof. The composition (weight %) of the composite material is: ceramic (Ti 3 SiC 2 ) is: 1% to 5%, zinc oxide (ZnO) is: 0.1% to 5.0%, rare earth oxide (Sm 2 o 3 ) is: 0.1% to 5.0%, rare earth oxides (Gd 2 o 3 ) is: 0.1% to 5.0%, and the balance is gold. The preparation method includes: mixing gold powder and ceramic powder prepared by electrolysis according to the weight percentage, putting them into a high-energy stirring ball mill and mixing them evenly, and then adopting cold isostatic pressing, vacuum sintering, hot extrusion, drawing, rolling, etc. processing. The invention is characterized in that the preparation process is simple, the environment is not polluted, the composite material has excellent and stable comprehensive properties, and is suitable for preparing electrical contact materials such as commutators, slip rings, electric brushes and electrodes.

Description

technical field [0001] The invention relates to a gold-ceramic electrical contact composite material and a preparation method thereof, belonging to the field of gold-based electrical materials. Background technique [0002] Gold-based electrical materials mainly include AuNi, AuCu, AuAg, AuAgCu, AuPd, AuAgNi, AuLa 2 o 3 、AuY 2 o 3 etc., mainly used as brushes, commutators, slip rings, electrodes and other materials in the electromechanical field of robots, drones, electric vehicles, etc. However, the main problems of the traditional gold-based electrical materials are: (1) poor wear resistance and high noise; (2) high hardness and strength, which do not match the conductivity; (3) unstable comprehensive performance and long working life short wait. In order to solve this contradiction, multi-element alloying and compounding of gold-based materials are usually used to solve it. However, with the improvement of the performance and stability of materials under harsh condit...

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Problems solved by technology

However, the main problems of the traditional gold-based electrical materials are: (1) poor wear resistance and high noise; (2) high hardness and strength, which do not match the conductivity; (3) unstable comprehensive performance and long working life short wait

[0005] Although gold-ceramic electrical contact composites have shown good electrical conductivity, thermal conductivity, wear resistance and mechanical properties, but because of the nano rare earth oxide (Sm 2 o 3 、Gd 2 o 3 ) phase is difficult to disperse, and has poor wettability with the gold matrix, resulting in the easy aggregation of rare earth oxide particles in the gold matrix, weak interfacial bonding, and low density of the composite material, so that the performance of the gold-ceramic matrix composite material failed to perform well

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