Article ID Journal Published Year Pages File Type
1448485 Acta Materialia 2009 13 Pages PDF
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
, , , ,