Rapid solidification of highly undercooled alloy dropletsExperimental work is described on undercooling and structure of tin-lead droplets emulsified in oil. The droplets, predominantly in the size range of 10-20 microns, were cooled at rates ranging from about 0.04 K/sec to 1,000,000 K/sec. The higher cooling rates were obtained by a newly developed technique of quenching the emulsified droplets in a cold liquid. Measured undercoolings (at the lower cooling rates) ranged up to about 100 C. Structures obtained depended strongly on undercooling, cooling rate before nucleation, droplet size, alloy composition and the rate of heat extraction after nucleation.
Document ID
19840045965
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chu, M. G. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Shiohara, Y. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Flemings, M. C. (MIT Cambridge, MA, United States)