Alloy solidification in systems containing a liquid miscibility gap

Document Type

Article

Publication Date

4-1981

Department

Department of Materials Science and Engineering

Abstract

Directional solidification methods have been used to examine the growth of fibrous, or tubular, composite samples in alloys close to the monotectic reaction: Liquid 1 Solid + Liquid 2. The binary systems Al-In, Cu-Pb and Cd-Ga have been examined and some use made of a transparent analogue, succinnonitrile-water. The solidification behavior appears to relate to the height of the miscibility gap in such systems and it is demonstrated how ternary additions which change this height (Sn to Al-In, Al to Cu-Pb) modify the microstructures dramatically. These structural changes are discussed with reference to the relative surface energies between two immiscible liquids and a third (solid) phase. The phase spacings and transitions in microstructure are discussed in terms of diffusion processes at the monotectic front.

Publisher's Statement

© 1981 American Society For Metals And The Metallurgical Society Of AIME. Publisher’s version of record: https://doi.org/10.1007/BF02649742

Publication Title

Metallurgical Transactions A

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