Paper Title:
A Homogeneous Solidification Criterion for Undercooled Ni-20at%Pb Hypermonotectic Melts
  Abstract

The kinetic process of liquid-liquid phase separation in the undercooled Ni-20at%Pb hypermonotectic alloy melts was analyzed theoretically. The results showed that liquid-liquid separation could not be inhibited due to smaller nucleation barrier and bigger nucleation rate of Pb-rich droplets. In the course of liquid-liquid phase separation, the volume fraction of Pb-rich droplets was thought as a function of time or temperature. At a certain cooling rate, the volume fraction was mainly controlled by the undercooling of Ni-Pb hypermonotectic melts. Based on the above results, a homogeneous solidification criterion for the undercooled Ni-20at%Pb hypermonotectic alloy melts was developed. Such a criterion predicted that the homogeneous microstructure could be obtained at the undercooling 263K, and the experimental results accorded with the predicting ones on the whole.

  Info
Periodical
Edited by
Hyungsun Kim, Jian Feng Yang, Chuleol Hee Han, Somchai Thongtem and Soo Wohn Lee
Pages
340-343
DOI
10.4028/www.scientific.net/MSF.695.340
Citation
H. Xie, G. C. Yang, L. Jia, Z. L. Lu, "A Homogeneous Solidification Criterion for Undercooled Ni-20at%Pb Hypermonotectic Melts", Materials Science Forum, Vol. 695, pp. 340-343, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Matthias Kolbe, J.R. Gao, S. Reutzel
Abstract:Liquid Cu-Co shows a metastable miscibility gap where the homogeneous melt separates into the Co-rich L1-liquid and the Cu-rich L2-liquid....
455
Authors: Yun Zhong Liu, Yuan Yuan Li
Abstract:A novel spray forming process was developed to produce large billets, wide plates or thick tubes with excellent microstructures and high...
1171
Authors: Paul L. Schaffer, Ragnvald H. Mathiesen, Lars Arnberg
Abstract:Hypermonotectic alloys are distinguished by a temperature region for which the homogeneous melt decomposes into two liquid phases. In...
149
Authors: Sheng Dong Gao, Yang Wang, Hong Bo Wang, Yan Wu
Chapter 1: Materials Science and Engineering
Abstract:An experimental device capable of producing uniform metal droplet stream and electric charging and deflecting has been developed. Uniform...
519
Authors: Rafael Cardoso Toledo, F.E. de Freitas, Chen Y. An, I.N. Bandeira
Chapter 3: Ceramics II
Abstract:Containerless solidification of 300 to 850 µm diameter droplets of PbSn eutectic alloy was achieved by using a 3m length drop tube, which is...
1633