The Preparation Of Cu-Te Series Alloys And Research On Their Performance

With the development of the new science and technology, to copper alloys higher performance are required in extremely high magnets, trains and IC(Integrated circuit.) et al. To copper alloys not only the high conductivity but also the high strength and the high hardness are required. But to copper alloy, there exists a contradiction between high conductivity and high strength. How to improve the strength of the alloy and keep high conductivity becomes the same object of different country's researches. Among all the strengthening method, alloying method is an important way, especially suitable to cosmically industry production. At the present, Cr,Zr,Nb,Fe,Re are often used alloy elements to the copper, short of studying new copper alloys. To our country, this demand is more urgent.Based on the work of others, different concentration Cu-Te alloys are produced taking the advantage of Te resource in Sichuan province. Meanwhile, in order to get higher strength, Mg and Cr are added as the third composition.In this paper, universal material testing machine, hardness machine and a direct current four-probe are used to investigate the change of copper alloys'strength and conductivity after cold working and heat treatment. To study the microstructure, SEM, XRD, and electron probe are applied. Considering the possible use in practice situation, corrosion and oxidation performance has also been researched. Such conclusions can be drawn in our study.A phase Cu2Te is formed after heat treatment in Cu-Te alloy, and this phase has less influence to the copper's conductivity. With the increase of Te content, the tensile strength is improved, but the effect is limited. After immersion in the 3.5% sodium chlorine solution at 25℃, Cu-Te alloys show better corrosion-resistance than pure copper.