| Title |
Effect of Powder Alloy Composition on the Microstructure and Properties of Cold Sprayed Cu-In Based Coating Materials |
| Authors |
김지원(Ji Won Kim); 최병철(Byeong Cheul Choi); 박동용(Dong Yong Park); 이기안(Kee Ahn Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2015.53.5.326 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloys; powder processing; coating; microstructure; scanning electron microscopy; SEM |
| Abstract |
This study attempted to manufacture Cu-In coating materials via the cold spray process and to investigate the effect of powder alloy composition on the microstructure and properties of the cold sprayed Cu-In based materials. Three kinds of Cu-15 at%In, Cu-20 at%In, Cu-30 at%In powders were used in this study. The results showed that the coating layers could be manufactured with Cu-15 at%In and Cu-20 at%In compositions via the cold spray process, except for Cu-30 at%In. Cold sprayed Cu-15 at%In and Cu-20 at%In coating materials possessed α-Cu, Cu4In and Cu7In3 phases. But, Cu-30 at%In powders contained only brittle Cu7In3 intermetallic phase. Post annealing heat treatments (100~500 ℃/1 hr.) were conducted on the Cu-In based coating materials to improve the densification properties. Porosity and hardness decreased as the annealing temperature increased. With the heat treatment of 500 ℃/1 hr., porosity decreased into 0.38%(Cu-15 at%In) and 0.74%(Cu-20 at%In). However, in heat treatment at temperature beyond 400 ℃, a small amount of additional In2O3 was detected. The optimal alloy composition for cold sprayed Cu-In based target material was also discussed. |