Metallurgical Transactions A

, Volume 20, Issue 10, pp 2109–2115

The evolution of microstructure in the undercooled Zn-Sn entrained droplets


  • K. Chattopadhyay
    • Department of MetallurgyIndian Institute of Science
  • P. R. Swarnamba
    • Department of MetallurgyIndian Institute of Science
  • J. P. N. Srivastava
    • Mishra Dhatu Nigam Parishad

DOI: 10.1007/BF02650297

Cite this article as:
Chattopadhyay, K., Swarnamba, P.R. & Srivastava, J.P.N. MTA (1989) 20: 2109. doi:10.1007/BF02650297


The existence of a metastable miscibility gap has been indicated from the metastable phase diagram of the Zn-Sn system calculated using regular solution and Krupkowski's models. To validate this phenomenon experimentally, the entrained droplet technique was used to achieve high undercooling and to access the metastable regions. The microstructural analysis confirms the miscibility gap and the associated monotectic reaction. Evidence is also presented for a possible massive solidification of the undercooled melt.

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© The Minerals, Metals & Materials Society and ASM International 1989