Anisotropic magnetorheological elastomers (MREs) with four different mass percentages of
iron powder were prepared in an external magnetic field. The inner structure of the samples
was characterized by using computed tomography. It has been shown that this kind of
non-destructive analysis of MRE samples can be efficiently used for a detailed structural
investigation. It was found that even small changes in the mass content of the magnetic
filler led to the formation of completely different morphologies, which were reproducible for
all samples. There were the familiar column formations in patterns with a mass content of ∼ 5% iron powder. Increasing
the mass fraction to ∼ 14%
resulted in the formation of tubular structures. Samples with ∼ 23 and ∼ 33 wt%
had a densely packed structure, where the particle formations broke up: meanders without
particles penetrate the samples over the entire height like canyons.
Über eine templatgestützte Methode wurden hochporöse Kohlenstoffmonolithe unter Verwendung von Porenbeton als Templat hergestellt. Aufgrund der guten mechanischen Bearbeitbarkeit von Porenbeton lassen sich poröse Kohlenstoffmonolithe in vielfältiger Form synthetisieren. Die Porenweitenverteilung der erhaltenen Monolithe erstreckt sich vom Mikro‐ bis zum Makroporenbereich. Derartige Materialien stellen eine vielversprechende Basis für die Entwicklung von technischen Komponenten für den Einsatz in Adsorption oder Katalyse dar.
Dynamic MRI sequences allow direct observation of the joint`s movements.• Patients with known or suspected disc displacement benefit the most.• Dynamic MRI is a sensible addition to solely static images.
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