The Influence of Gravity on the Precise Measurement of Solute Diffusion Coefficients in Dilute Liquid Metals and Metalloids
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Post-publication record
- Nature
- Retraction
- Reason
- Duplication of/in Article;Investigation by Company/Institution;Investigation by Third Party;
- Date
- 9/25/2009 0:00
- Flagged by OpenAlex?
- Yes
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Abstract
It is now well known that the diffusion coefficient (D) measured in a laboratory in low earth orbit (LEO) is less than the corresponding value measured in a terrestrial laboratory. However, all LEO laboratories are subject to transient accelerations (g-jitter) superimposed on the steady reduced gravity environment of the space platform. In measurements of the diffusion coefficients for dilute binary alloys of Pb-(Ag, Au,Sb), Sb-(Ga,In), Bi-(Ag,Au,Sb), Sn-(Au,Sb), Al-(Fe, Ni,Si), and In-Sb in which g-jitter was suppressed, it was found that D proportional to T (temperature) if g-jitter was suppressed, rather than D proportional to T(2) as observed by earlier workers with g-jitter present. Furthermore, when a forced g-jitter was applied to a diffusion couple, the value measured for D increased. The significance of these results is reviewed in the light of recent work in which ab initio molecular dynamics simulations predicted a D proportional to T relationship.
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The record
- Venue
- Annals of the New York Academy of Sciences
- Topic
- Chemical Thermodynamics and Molecular Structure
- Field
- Chemistry
- Canadian institutions
- Queen's University
- Funders
- National Aeronautics and Space Administration
- Keywords
- JitterDiffusionWork (physics)Analytical Chemistry (journal)PhysicsThermodynamicsMetalloidChemistryMaterials scienceMetalMetallurgyEnvironmental chemistry
- Has abstract in OpenAlex
- yes