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http://dx.doi.org/10.4150/KPMI.2013.20.6.439

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

Choi, Jin Ho (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Yang, Sangsun (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Kim, Yang-Do (Department of Metallurgical Engineering, Pusan National University)
Yun, Jung-Yeul (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Publication Information
Journal of Powder Materials / v.20, no.6, 2013 , pp. 439-444 More about this Journal
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 $80^{\circ}C$. The PVA and PU foams were then removed by heating at $700^{\circ}C$ for 3 hours. The debinded samples were subsequently sintered at $1250^{\circ}C$ 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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