Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1448485 | Acta Materialia | 2009 | 13 Pages |
Abstract
Directional solidification experiments on Cu–Sn peritectic alloys have been conducted at very low velocity in a high-thermal-gradient Bridgman furnace. The size of the samples has been reduced in order to decrease natural convection and the associated macrosegregation. At the lowest growth rates (0.5 and 0.58 μm s−1), eutectic-like α + β lamellar structures have been observed in near-peritectic composition alloys over several millimeters of growth. These structures resulted from a destabilization of a band structure in which α- and β-phases overlay each other. Electron backscattered diffraction measurements revealed that bands and lamellae of a solid phase are continuous and originate from a single nucleus.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
F. Kohler, L. Germond, J.-D. Wagnière, M. Rappaz,