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  • 1
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    Unknown
    Thermocapillary-driven convection in supported and floating-zone crystallization (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Marangoni flow was induced in a thin disk of molten tin with an atomically clean surface by heating it from below in an ultra high vacuum apparatus. The radial distribution of temperature was measured and no temperature oscillations were observed. Strong mechanical disturbances introduced at a Marangoni number of about 4300 died out quickly with time indicating that the system was stable. Mathematical models indicate that strong flows in a two cell structure exist under the conditions studied, and that the velocity profile in the cell near the surface is of the boundary layer type which varies rapidly with depth.
    Keywords: SOLID-STATE PHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 4; 5, 19; 15-22
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Electron loss study of the native oxide of tin (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Using electron loss spectroscopy in combination with ion beam depth profiling, it has been established that the oxide of tin formed by electropolishing followed by room temperature aging is metal free and composed of a mixture of SnO2 and SnO. In a fresh oxide layer, the SnO2 is confined to the outer portion of the predominantly SnO oxide. In an aged oxide layer, SnO2 is present up to the oxide/metal interface with an ever decreasing concentration as the interface is approached.
    Keywords: SOLID-STATE PHYSICS
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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