TaB2 / Cu composite material for electric contact and preparation method thereof

By introducing TaB2 ceramic particles into a copper matrix, a TaB2/Cu composite material was prepared, which solved the problems of mass loss and unstable contact resistance in the electrical contact process of copper alloys and copper-based composite materials. This resulted in an electrical contact material with high conductivity and low mass loss, which is suitable for DC fast charging of new energy vehicles.

CN122279309APending Publication Date: 2026-06-26XIAN UNIV OF TECH
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Patent Information

Application Number
CN202610540722.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing copper alloys and copper-based composite materials suffer from severe mass loss, unstable contact resistance, and poor conductivity during electrical contact. This is especially true in DC fast charging technology for new energy vehicles, where the volatilization of the eutectic phase and the dissolution of the nano-precipitated phase during arc erosion lead to a decline in material performance.

Method used

TaB2 ceramic particles were used as a reinforcing phase and combined with a copper matrix. TaB2/Cu composite materials were prepared through processes such as induction melting, in-situ reaction, hot forging, cold rolling and annealing to ensure uniform distribution of TaB2 and improve the conductivity and resistance to arc erosion of the material.

Benefits of technology

It achieves high conductivity, low mass loss and stable contact resistance, meeting the material requirements of DC fast charging for new energy vehicles, and has good electrical contact performance and resistance to arc erosion.

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Abstract

The invention discloses a TaB2 / Cu composite material for electric contact and a preparation method of the TaB2 / Cu composite material, and the composite material comprises the following components in percentage by mass: 95-99.5% of Cu and 0.5-5% of TaB2. The preparation method comprises the steps that a Cu-Ta intermediate alloy, a Cu raw material and a B raw material are independently smelted and then subjected to an in-situ reaction, and an as-cast TaB2 / Cu composite material is obtained; and the as-cast TaB2 / Cu composite material is subjected to hot forging and then subjected to cold rolling treatment, and finally, the cold-rolled material is subjected to annealing treatment. The TaB2 ceramic particles are introduced into the copper matrix, so that the characteristics of high melting point, high strength and arc erosion resistance of the boride ceramic phase are combined with the high conductivity of pure copper, and the copper-based composite material with high conductivity, low mass loss and stable contact resistance is prepared.
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