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Vol.53, No.5, 326 ~ 336, 2015
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| Title |
| Effect of Powder Alloy Composition on the Microstructure and Properties of Cold Sprayed Cu-In Based Coating Materials |
| 김지원 Ji Won Kim , 최병철 Byeong Cheul Choi , 박동용 Dong Yong Park , 이기안 Kee Ahn Lee |
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| 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. |
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| Key Words |
| alloys, powder processing, coating, microstructure, scanning electron microscopy, SEM |
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