Warm Spray 공정과 Cu-Ga 및 Cu-In 혼합 분말을 이용한 CGI계 복합 코팅층의 제조 및 특성

서지정보

ㆍ발행기관 : 한국분말야금학회 ㆍ수록지정보 : 한국분말야금학회지 / 21권 / 3호
ㆍ저자명 : 전민광, 이명주, 김형준, 이기안

영어 초록

This study manufactured a CIG-based composite coating layer utilizing a new warm spray process, and amixed powder of Cu-20at.%Ga and Cu-20at.%In. In order to obtain the mixed powder with desired composition, theCu-20at.%Ga and Cu-20at.%In powders were mixed with a 7:1 ratio. The mixed powder had an average particle size of35.4 µm. Through the utilization of a warm spray process, a CIG-based composite coating layer of 180 µm thicknesscould be manufactured on a pure Al matrix. To analyze the microstructure and phase, the warm sprayed coating layerunderwent XRD, SEM/EDS and EMPA analyses. In addition, to improve the physical properties of the coating layer, anannealing heat treatment was conducted at temperatures of 200℃, 400℃ and 600℃ for 1 hour each. The microstructureanalysis identified α-Cu, Cu4In and Cu3Ga phases in the early mixed powder, while Cu4In disappeared, and additionalCu9In4 and Cu9Ga4 phases were identified in the warm sprayed coating layer. Porosity after annealing heat treatmentreduced from 0.75% (warm sprayed coating layer) to 0.6% (after 600℃/1 hr. heat treatment), and hardness reducedfrom 288 Hv to 190 Hv. No significant phase changes were found after annealing heat treatment.

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