Preflight diffusion experiments on liquid metals under 1g conditions for the FOTON-M2 mission

Shinsuke Suzuki, Kurt Helmut Kraatz, Günter Frohberg, Ralca Roşu, Wolfgang Wendl, German Müller-Vogt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

We measured diffusion of up to 5% Ag in liquid Pb, using the Foton shear cell (designed and used for the FOTON-M2 mission). Since the density change of the alloy with composition has been reported to be very small but is not reliably known, we performed two arrangements of layering: (a) with PbAg on top and Pb below and (b) with Pb on top and PbAg below. The Berlin group did interdiffusion experiments from a "thick layer" of PbAg into "semi-infinite" Pb and the Karlsruhe group did the typical "interdiffusion" experiments with a diffusion couple of PbAg versus Pb. The results of both groups were equivalent, showing much lower D values for arrangement (b) than for (a). The lower values were even definitely lower than reference microgravity values from MIR/MIM and could be fitted by D = AT n with n about 2.2. We discuss the stability/instability by density layering depending on the arrangement.

Original languageEnglish
Title of host publicationInterdisciplinary Transport Phenomena in the Space Sciences
PublisherBlackwell Publishing Inc.
Pages380-394
Number of pages15
ISBN (Print)1573316393, 9781573316392
DOIs
Publication statusPublished - 2006 Sep
Externally publishedYes

Publication series

NameAnnals of the New York Academy of Sciences
Volume1077
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632

Keywords

  • Diffusion
  • FOTON satellite
  • Ground experiment
  • Liquid metal
  • Microgravity
  • PbAg
  • Shear cell

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

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