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대면적 Fecralloy 코팅층의 표면 거침도 극대화를 위한 정전분무 및 열처리 공정 연구
이혜문,구혜영,양상선,박다희,정수호,윤중열,Lee, Hye Moon,Koo, Hye Young,Yang, Sangsun,Park, Dahee,Jung, Sooho,Yun, Jung-Yeul 한국분말야금학회 2017 한국분말재료학회지 (KPMI) Vol.24 No.1
Fecralloy coating layer with large surface area is suitable for use as a filter media for efficient removal of hot gaseous pollutants exhausted from combustion processes. For uniform preparation of a Fecralloy coating layer with large surface area and strong adhesion to substrate, electrospray coating and thermal treatment processes are experimentally optimized in this study. A nano-colloidal solution with 0.05 wt% Fecralloy nanoparticles is successfully prepared. Optimized electrospraying conditions are experimentally discovered to prepare a uniform coating layer of Fecralloy nano-colloidal solution on a substrate. Drying the electrospray coated Fecralloy nano-colloidal solution layer at $120^{\circ}C$ and subsequent heating at $600^{\circ}C$ are the best post-treatment for enhancing the adhesion force and surface roughness of the Fecralloy coating layer on a substrate. An electrospray coating system, consisting of several multi-groove nozzles, is also experimentally confirmed as a reasonable device for uniform coating of Fecralloy nano-colloid on a large area substrate.