Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 16, Issue -, Pages 432-434Publisher
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1107/S0909049509001939
Keywords
X-ray radioscopy; metal foams; coalescence; CMOS; micro-radiography; liquid films; metallic thin films; viscosity; fracture; aluminium alloys; bubbles
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Investigations of pore coalescence and individual cell wall collapse in an expanding liquid metal foam by means of X-ray radioscopy with spatio-temporal micro-resolution are reported. By using white synchrotron radiation for imaging, the rupture of a film and the subsequent merger of two neighbouring bubbles could be recorded with a time sampling rate of 40000 frames s(-1) (25 mu s exposure time) and a spatial sampling rate of 20 mm. The rupture time of a cell wall was found to be in the range of 300 ms. This value is in agreement with theoretical considerations which assume an inertia-dominated rupture time of cell walls in liquid metal foams.
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