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Acoustic emission analysis of the compressive deformation of iron foams and their biocompatibility study
H. Park, K. Hong, JS. Kang, T. Um, M. Knapek, P. Minárik, YE. Sung, K. Máthis, A. Yamamoto, HK. Kim, H. Choe,
Language English Country Netherlands
Document type Journal Article
- MeSH
- Acoustics * MeSH
- Biocompatible Materials chemistry toxicity MeSH
- Cell Line MeSH
- X-Ray Diffraction MeSH
- Electrochemistry methods MeSH
- Fibroblasts MeSH
- Corrosion MeSH
- Mice MeSH
- Compressive Strength MeSH
- Porosity MeSH
- Materials Testing MeSH
- Viscoelastic Substances chemistry MeSH
- Ferric Compounds chemistry MeSH
- Iron chemistry toxicity MeSH
- Animals MeSH
- Check Tag
- Mice MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
We synthesized Fe foams using water suspensions of micrometric Fe2O3 powder by reducing and sintering the sublimated Fe oxide green body to Fe under 5% H2/Ar gas. The resultant Fe foam showed aligned lamellar macropores replicating the ice dendrites. The compressive behavior and deformation mechanism of the synthesized Fe foam were studied using an acoustic emission (AE) method, with which we detected sudden localized structural changes in the Fe foam material. The evolution of the deformation mechanism was elucidated using the adaptive sequential k-means (ASK) algorithm; specifically, the plastic deformation of the cell struts was followed by localized cell collapse, which eventually led to fracturing of the cell walls. For potential biomedical applications, the corrosion and biocompatibility characteristics of the two synthesized Fe foams with different porosities (50% vs. 44%) were examined and compared. Despite its larger porosity, the superior corrosion behavior of the Fe foam with 50% porosity can be attributed to its larger pore size and smaller microscopic surface area. Based on the cytotoxicity tests for the extracts of the foams, the Fe foam with 44% porosity showed better cytocompatibility than that with 50% porosity.
Center for Nanoparticle Research Institute for Basic Science Seoul 08826 Republic of Korea
Department of Physics of Materials Charles University Ke Karlovu 5 CZ12116 Prague 2 Czech Republic
References provided by Crossref.org
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- $a Park, Hyeji $u School of Materials Science and Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Republic of Korea.
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- $a We synthesized Fe foams using water suspensions of micrometric Fe2O3 powder by reducing and sintering the sublimated Fe oxide green body to Fe under 5% H2/Ar gas. The resultant Fe foam showed aligned lamellar macropores replicating the ice dendrites. The compressive behavior and deformation mechanism of the synthesized Fe foam were studied using an acoustic emission (AE) method, with which we detected sudden localized structural changes in the Fe foam material. The evolution of the deformation mechanism was elucidated using the adaptive sequential k-means (ASK) algorithm; specifically, the plastic deformation of the cell struts was followed by localized cell collapse, which eventually led to fracturing of the cell walls. For potential biomedical applications, the corrosion and biocompatibility characteristics of the two synthesized Fe foams with different porosities (50% vs. 44%) were examined and compared. Despite its larger porosity, the superior corrosion behavior of the Fe foam with 50% porosity can be attributed to its larger pore size and smaller microscopic surface area. Based on the cytotoxicity tests for the extracts of the foams, the Fe foam with 44% porosity showed better cytocompatibility than that with 50% porosity.
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- $a Máthis, Kristián $u Department of Physics of Materials, Charles University, Ke Karlovu 5, CZ12116 Prague 2, Czech Republic. Electronic address: mathis@met.mff.cuni.cz.
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