Journal ArticleDOI
Real-time X-ray radioscopy on metallic foams using a compact micro-focus source
TLDR
In this paper, a measurement apparatus for observing the foaming of metals is described, consisting of a microfocus X-ray source, a small heater and a panel detector, which can be recorded in real-time with frequencies up to 9 Hz and resolutions down to 5 μm due to the small spot size.Abstract:
A measurement apparatus for observing the foaming of metals is described. It consists of a microfocus X-ray source, a small heater and a panel detector. The foaming of samples can be recorded in real-time with frequencies up to 9 Hz and resolutions down to 5 μm due to the small spot size. Magnifications up to 10x are obtained by simply changing the distance between source, sample and detector. Foaming of Al alloys and sandwiches was investigated applying different final foaming temperatures, heating rates and blowing agent pre-treatments. An image analysis program was developed to automatically recognise the foam expansion.read more
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Colloidal Particles at Liquid Interfaces
TL;DR: Particles at liquid interfaces - an introduction B. P. Binks and T. Horozov, and Theory for interactions between particles in monolayers, a review.
Journal ArticleDOI
Metal Foams: Production and Stability†
TL;DR: In this article, the authors classified various methods for making liquid metal foams with respect to the mode of gas generation and the type of melt used for foaming, and found that although stabilisation seems to be based on the presence of a solid constituent in all the foaming processes, the mechanisms might vary.
Journal ArticleDOI
Foams: From nature to industry
Christopher Hill,Julian Eastoe +1 more
TL;DR: Stability of foams will be discussed, with the main focus on how the chemical nature and structure of surfactants, proteins and particles act together to produce long-lived stable foams.
Journal ArticleDOI
Structure and deformation correlation of closed-cell aluminium foam subject to uniaxial compression
Mohammad Saadatfar,M. Mukherjee,Mahyar Madadi,Gerd E. Schröder-Turk,Francisco García-Moreno,Fabian M. Schaller,Stefan Hutzler,Adrian Sheppard,John Banhart,Upadrasta Ramamurty +9 more
TL;DR: In this paper, the results of an experimental and numerical study conducted on a closed-cell aluminium foam that was subjected to uniaxial compression with lateral constraint were reported. And the results showed that regions with higher degrees of anisotropy in the undeformed foam have a tendency to initiate the onset of cell collapse.
Journal ArticleDOI
Catalytic partial oxidation of methane on platinum investigated by spatial reactor profiles, spatially resolved spectroscopy, and microkinetic modeling
Oliver Korup,Claude Franklin Goldsmith,Gisela Weinberg,Michael Geske,Timur Kandemir,Robert Schlögl,Raimund Horn +6 more
TL;DR: In this paper, the authors used Raman spectroscopy, electron microscopy, and microkinetic modeling to study the catalytic partial oxidation of methane on Pt. The measured species profiles through Pt coated foam catalysts exhibit a two-zone structure: an abrupt change in reaction rates separates the fast exothermic oxidation chemistry at the entrance of the reactor from the slow end-othermic reforming chemistry.