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The interaction of bubbles with solidification interfacesThe behavior of bubbles at a dendritic solidification interface was studied during the coasting phase of a sounding rocket flight. Sequential photographs of the gradient freeze experiment showed nucleation, growth and coalescence of bubbles at the moving interface during both the low-gravity and one-gravity tests. In the one-gravity test the bubbles were observed to detach from the interface and float to the top of the melt. However, in the low-gravity tests no bubble detachment from the interface or steady state bubble motion occurred and large voids were grown into the crystal. These observations are discussed in terms of the current theory of thermal migration of bubbles and in terms of their implications on the space processing of metals.
Document ID
19770037037
Document Type
Conference Paper
Authors
Papazian, J. M. (Grumman Aerospace Corp. Bethpage, N.Y., United States)
Wilcox, W. R. (Clarkson College of Technology Potsdam, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
SOLID-STATE PHYSICS
Report/Patent Number
AIAA PAPER 77-194
Meeting Information
Aerospace Sciences Meeting(Los Angeles, CA)
Funding Number(s)
CONTRACT_GRANT: NAS8-31529
Distribution Limits
Public
Copyright
Other