Gravity‐Induced Anomalies in Interphase Spacing Reported for Binary Eutectics
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Post-publication record
- Nature
- Retraction
- Reason
- Duplication of/in Article;Investigation by Company/Institution;Investigation by Third Party;
- Date
- 9/1/2009 0:00
- Flagged by OpenAlex?
- Yes
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Abstract
It has been reasoned that desirable microstructural refinement in binary eutectics could result from freezing in reduced-gravity. It is recognized that the interphase spacing in a binary eutectic is controlled by solute transport and that, on Earth, buoyancy-driven convection may enhance this. Hence, it has been presumed that the interphase spacing ought to decrease when a eutectic alloy is frozen under conditions of much-reduced gravity, where such buoyancy effects would be largely absent. The result of such speculation has been that many workers have frozen various eutectics under reduced gravity and have reported that, although some eutectics became finer, others showed no change, and some even became coarser. This reported varied behavior will be reviewed in the light of long term studies by the author at Queen's University, including recent microgravity studies in which samples of two eutectic alloy systems, MnBi-Bi and MnSb-Sb, were frozen under very stable conditions and showed no change in interphase spacing.
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The record
- Venue
- Annals of the New York Academy of Sciences
- Topic
- Solidification and crystal growth phenomena
- Field
- Materials Science
- Canadian institutions
- Queen's University
- Funders
- Canadian Space Agency
- Keywords
- InterphaseEutectic systemBinary numberMaterials scienceGeologyGeodesyPhysicsMathematicsBiologyComposite materialCell biologyMicrostructure
- Has abstract in OpenAlex
- yes