Abstract
Mollard and Flemings [1] and Cline [2] produced lamellar and fibrous com posites of various lead-tin alloys by directional solidification under conditions in which free convection was suppressed. Experiments on mixtures containing a non-faceted material and a platelet-forming material showed that oriented com posites could be obtained from off-eutectic compositions by zone melting, even with convection present [3]. Pepper [4] produced irregular fibers of Be in Al by zone melting of off-eutectic mixtures. The purpose of the present work was to see just how drastic freezing conditions could be when one component was a strong fiber-former and still obtain an oriented composite. An organic system was chosen for the experiments to permit observation of the freezing interface under the microscope.
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