Paper Title:
Microstructure Formation at Low Velocity during Directional Solidification of Pb-Bi Peritectic Alloys
  Abstract

Directional solidification experiments on Pb-Bi peritectic alloys have been conducted at very low velocity (V=0.5 μm/s) and high thermal gradient (G=25 K/mm). Incomplete banded and oscillatory structures have been observed in both of hypoperitectic and hyperperitectic compositions over several millimeters of growth. These structures resulted from the repeated nucleation and competition between properitectic α- and peritectic β-phases. The banded or oscillatory structures are found to be transient and the final steady-state phase was only the peritectic β-phases. With an increase in composition, β phase formed and α phase disappeared at a lower solidified distance. Composition variations in the banded structure are measured to determine the solute distribution along the growth direction.

  Info
Periodical
Advanced Materials Research (Volumes 97-101)
Edited by
Zhengyi Jiang and Chunliang Zhang
Pages
971-974
DOI
10.4028/www.scientific.net/AMR.97-101.971
Citation
X. W. Hu, S. M. Li, S. F. Gao, L. Liu, H. Z. Fu, "Microstructure Formation at Low Velocity during Directional Solidification of Pb-Bi Peritectic Alloys", Advanced Materials Research, Vols. 97-101, pp. 971-974, 2010
Online since
March 2010
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