The Effect of Binder Content for the Pore Properties of Fe Foam Fabricated by Slurry Coating Process

Jin Ho Choi; Sangsun Yang; Yang-Do Kim; Jung-Yeul Yun

doi:10.4150/KPMI.2013.20.6.439

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슬러리 코팅 공정으로 제조된 Fe 폼의 기공 특성에 미치는 바인더 함량의 영향: 최진호, 양상선, 김양도, 윤중열
The Effect of Binder Content for the Pore Properties of Fe Foam Fabricated by Slurry Coating Process: Jin Ho Choi, Sangsun Yang, Yang-Do Kim, Jung-Yeul Yun; Journal of Korean Powder Metallurgy Institute 2013;20(6):439-444
DOI: https://doi.org/10.4150/KPMI.2013.20.6.439

¹한국기계연구원 부설 재료연구소 분말기술연구실
²한국기계연구원 부설 재료연구소 분말기술연구실
³부산대학교 재료공학과
⁴한국기계연구원 부설 재료연구소 분말기술연구실
¹Powder Technology Department, Korea Institute of Materials Science (KIMS)
²Powder Technology Department, Korea Institute of Materials Science (KIMS)
³Department of Metallurgical Engineering, Pusan National University
⁴Powder Technology Department, Korea Institute of Materials Science (KIMS)

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Abstract

Fe foam with above 90% porosity and 2 millimeter pore size was successfully fabricated by a slurry coating process. In this study, the binder contents were controlled to produce the Fe foam with different pore size, strut thickness and porosity. Firstly, the slurry was prepared by uniform mixing with Fe powders, distilled water and polyvinyl alcohol(PVA) as initial materials. After slurry coating on the polyurethane(PU) foam the sample was dried at 80°C. The PVA and PU foams were then removed by heating at 700°C for 3 hours. The debinded samples were subsequently sintered at 1250°C with holding time of 3 hours under hydrogen atmosphere. The three dimensional geometries of the obtained Fe foams with open cell structure were investigated using X-ray micro CT(computed tomography) as well as the pore morphology, size and phase.

Keywords: Metal foam;Slurry coating;Sintering;Porosity;Micro-CT;

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