브레이징 기법을 이용한 Cu 합금의 제조에 관한 연구

Abstract

Cu has an excellent characteristics in the electronic industry as the base metal and has been using as a contact material for a vacuum interrupters, electrode material for a various kinds of resistance welding and field requiring arc characteristic. However these kinds of original copper alloy doesn't only cost a lot but also has a low hardness and low wear resistance. If you use it in a harsh environment, reliability and affordable could be a problem. Even though it has been produced by sintering to improve these weaknesses, it still has a problem which is expensive. I have studied more affordable and efficient manufacturing method of copper alloys than sintering manufacturing method to improve these problems. I have tried to develop a material improved in the mechanical property by bonding Cu matrix and a various of a high strength component with brazing technique using BNi-2 while manufacturing copper alloys. There are four ways I have tried. Firstly, dispersion hardening of Al2O3 to Cu matrix. Secondly, dispersion hardening of ZrO2 to Cu matrix. Thirdly, dispersion hardening of Al2O3 to Cu matrix contained Fe-Cr. Lastly, dispersion hardening of WC powder to Cu matrix. From these four ways, I manufactured samples and observed microstructure and mechanical properties.