Effects of Powder Carrier on the Morphology and Compressive Strength of Iron Foams: Water vs Camphene

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Title
Effects of Powder Carrier on the Morphology and Compressive Strength of Iron Foams: Water vs Camphene
Author(s)
Hyeji Park; Teakyung Um; Kicheol Hong; Jin Soo Kang; Ho-Seok Nam; Kyungjung Kwon; Yung-Eun Sung; Heeman Choe
Publication Date
2018-10
Journal
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS, v.49, no.5, pp.2182 - 2190
Publisher
SPRINGER
Abstract
With its well-known popularity in structural applications, considerable attention has recently been paid to iron (Fe) and its oxides for its promising functional applications such as biodegradable implants, water-splitting electrodes, and the anode of lithium-ion batteries. For these applications, iron and its oxides can be even further utilized in the form of porous structures. In order to control the pore size, shape, and amount, we synthesized Fe foams using suspensions of micrometric Fe2O3 powder reduced to Fe via freeze casting in water or liquid camphene as a solvent through sublimation of either ice or camphene under 5 pct H2/Ar gas and sintering. We then compared them and found that the resulting Fe foam using water as a solvent (p = 71.7 pct) showed aligned lamellar macropores replicating ice dendrite colonies, while Fe foam using camphene as a solvent (p = 68.0 pct) exhibited interconnected equiaxed macropores replicating camphene dendrites. For all directions with respect to the loading axis, the compressive behavior of the water-based Fe foam with a directional elongated wall pore structure was anisotropic (11.6 ± 0.9 MPa vs 7.8 ± 0.8 MPa), whereas that of the camphene-based Fe foam with a random round pore structure was nearly isotropic (12.0 ± 1.1 MPa vs 11.6 ± 0.4 MPa). © 2018 The Minerals, Metals & Materials Society and ASM Internationa
URI
https://pr.ibs.re.kr/handle/8788114/5154
ISSN
1073-5615
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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