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http://hdl.handle.net/11375/6175
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DC Field | Value | Language |
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dc.contributor.advisor | Kirkaldy, J.S. | en_US |
dc.contributor.author | Venugopalan, Devarajan | en_US |
dc.date.accessioned | 2014-06-18T16:34:23Z | - |
dc.date.available | 2014-06-18T16:34:23Z | - |
dc.date.created | 2010-04-07 | en_US |
dc.date.issued | 1982-08 | en_US |
dc.identifier.other | opendissertations/1505 | en_US |
dc.identifier.other | 2188 | en_US |
dc.identifier.other | 1265700 | en_US |
dc.identifier.uri | http://hdl.handle.net/11375/6175 | - |
dc.description.abstract | <p>The steady-state growth of cells in binary alloy single phase solidification is examined theoretically and experimentally. The failure of the marginal-stability calculations to predict and describe the growth of stable cells indicates a theoretical gap in this field. The Zener-Hillert type model for cellular solidification proposed by Kirkaldy is discussed. In this theory the physics of cell growth demands that the interface be a non-equilibrium interface stabilized by Kinetic and crystallographic effects. A quantitative model following this line is advanced for the steady-state growth of two-dimensional cells. The solution to the free boundary diffusion problem requires, in addition to the boundary conditions, two extra constraints. A principle of minimum cell root radius, surrogate to the principle of minimum rate of entropy production, is used to provide the additional conditions. Cell growth in the succinonitrile-salol system was studied experimentally. For a given set of growth conditions the cells have a unique steadystate spacing and length. Perturbation experiments about the steady-state support the validity of the optimization procedure used in the calculations. Quantitative predictions on steady-state growth are verified by the experiments.</p> | en_US |
dc.subject | Metallurgy | en_US |
dc.subject | Metallurgy | en_US |
dc.title | Cellular Instability in Binary Solidification | en_US |
dc.type | thesis | en_US |
dc.contributor.department | Metallurgy | en_US |
dc.description.degree | Doctor of Philosophy (PhD) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Size | Format | |
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fulltext.pdf | 2.22 MB | Adobe PDF | View/Open |
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