Science China Physics, Mechanics and Astronomy

, Volume 57, Issue 3, pp 393–399

Solute redistribution profiles during rapid solidification of undercooled ternary Co-Cu-Pb alloy

Authors

  • Na Yan
    • Key Laboratory of Applied Physics and Chemistry, Ministry of EducationNorthwestern Polytechnical University
  • WeiLi Wang
    • Key Laboratory of Applied Physics and Chemistry, Ministry of EducationNorthwestern Polytechnical University
  • ZhenChao Xia
    • Key Laboratory of Applied Physics and Chemistry, Ministry of EducationNorthwestern Polytechnical University
    • Key Laboratory of Applied Physics and Chemistry, Ministry of EducationNorthwestern Polytechnical University
Articles Progress of Projects Supported by NSFC

DOI: 10.1007/s11433-013-5389-6

Cite this article as:
Yan, N., Wang, W., Xia, Z. et al. Sci. China Phys. Mech. Astron. (2014) 57: 393. doi:10.1007/s11433-013-5389-6

Abstract

The solute redistribution and phase separation of liquid ternary Co-35%Cu-32.5%Pb immiscible alloy have been investigated using glass fluxing method. A bulk undercooling of 125 K was achieved and the macrosegregation pattern was characterized by a top Co-rich zone and a bottom Cu-rich zone. The average solute contents of the two separated zones decreased with the increase of undercooling, except for the solute Pb in Cu-rich zone. With the enhancement of undercooling, a morphological transition from dendrites into equaxied grains occurred to the primary α(Co) phase in Co-rich zone. The solute redistribution of Cu in primary α(Co) phase was found to depend upon both the undercooling and composition of Co-rich zone. Stokes migration is shown to be the main dynamic mechanism of droplet movement during liquid phase separation.

Keywords

solute redistributionphase separationmacrosegregationundercoolingrapid solidification

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2014