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Materials 2018, 11(12), 2478; https://doi.org/10.3390/ma11122478

Investigation of the Foam Development Stages by Non-Destructive Testing Technology Using the Freeze Foaming Process

1
Institute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, Holbeinstr. 3, 01307 Dresden, Germany
2
Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Winterbergstraße 28, 01277 Dresden, Germany
*
Author to whom correspondence should be addressed.
Received: 12 November 2018 / Revised: 3 December 2018 / Accepted: 4 December 2018 / Published: 6 December 2018
(This article belongs to the Special Issue In-Situ X-Ray Tomographic Study of Materials)
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Abstract

With a novel Freeze Foaming method, it is possible to manufacture porous cellular components whose structure and composition also enables them for application as artificial bones, among others. To tune the foam properties to our needs, we have to understand the principles of the foaming process and how the relevant process parameters and the foam’s structure are linked. Using in situ analysis methods, like X-ray microcomputed tomography (µCT), the foam structure and its development can be observed and correlated to its properties. For this purpose, a device was designed at the Institute of Lightweight Engineering and Polymer Technology (ILK). Due to varying suspension temperature and the rate of pressure decrease it was possible to analyze the foam’s developmental stages for the first time. After successfully identifying the mechanism of foam creation and cell structure formation, process routes for tailored foams can be developed in future. View Full-Text
Keywords: Freeze Foaming; in situ computed tomography; non-destructive testing; bioceramics Freeze Foaming; in situ computed tomography; non-destructive testing; bioceramics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Maier, J.; Behnisch, T.; Geske, V.; Ahlhelm, M.; Werner, D.; Moritz, T.; Michaelis, A.; Gude, M. Investigation of the Foam Development Stages by Non-Destructive Testing Technology Using the Freeze Foaming Process. Materials 2018, 11, 2478.

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