Undercooling studies on dispersed bismuth droplets

Chaubey, Sanjay ; Singh, Vakil ; Ramachandrarao, P. (1987) Undercooling studies on dispersed bismuth droplets Bulletin of Materials Science, 9 (4). pp. 277-285. ISSN 0250-4707

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Official URL: http://www.ias.ac.in/j_archive/bms/9/1/277-286/vie...

Related URL: http://dx.doi.org/10.1007/BF02743977


In the zinc-bismuth system, a monotectic reaction occurs at 689 K and 0·6 at.% Bi composition. Rapid solidification of the as-cast monotectic alloy led to a micromorphology in which bismuth was uniformly and bimodally distributed as small droplets in the zinc matrix. Statistical analysis of the electron micrographs obtained from different transparent regions of the foils revealed that the size of most of the droplets was about 6 nm. These droplets undercooled by 132 K. An analysis of the nucleation rate measurements shows that the activation energy barrier to nucleation is of the order of 39·8 kcal/mol at the maximum undercooling.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Undercooling; Nucleation; Bismuth
ID Code:34867
Deposited On:14 Apr 2011 14:26
Last Modified:17 May 2016 17:45

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