Paper Title:
Liquid-Metal Foams – Feasible In Situ Experiments under Low Gravity
  Abstract

Metal foams are quite a challenge to materials scientists due to their difficult manufacturing. In all processes the foam develops in the liquid or semiliquid state. Liquid-metal foams are complex fluids which contain liquid metals, solid particles and gas bubbles at the same time. An X-ray transparent furnace was developed to monitor liquid metal foam evolution. Aluminium foams - similar to the commercial Metcomb foams - were produced by feeding argon or air gas bubbles into an aluminium composite melt. The foam evolution was observed in-situ by X-ray radioscopy under normal gravity. Drainage and rupture were evaluated during the 5 min foam decay and 2 min solidification. Argon blown foams showed significant drainage and cell wall rupture during the first 20 s of foam decay. Air blown foams were stable and neither drainage nor rupture occurred. We demonstrated the feasibility of experiments during parabolic flight or drop tower campaigns. However, the development of a foam generator for low gravity is needed.

  Info
Periodical
Edited by
A Roósz, M. Rettenmayr and Z. Gácsi
Pages
275-280
DOI
10.4028/www.scientific.net/MSF.508.275
Citation
N. Babcsán, F. Garcia-Moreno, D. Leitlmeier, J. Banhart, "Liquid-Metal Foams – Feasible In Situ Experiments under Low Gravity", Materials Science Forum, Vol. 508, pp. 275-280, 2006
Online since
March 2006
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Price
$32.00
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