An Overview of the Progress in Solidification of Binary Monotectics

U S Rai; Manjeet Singh
The solidification mechanism of a monotectic alloy is quite complicated due to wide freezing range of temperature and large density difference of the two liquid phases involved. However, the diffusion model by Jackson and Hunt and the wetting model by Cahn, have been successfully applied to various metallic and organic systems to explain the solidification behavior of different monotectics. Using these models, in the present paper, a current status of solidification of binary monotectics of metal as well as that of organic origins has been described and various methods to overcome the problems associated with this have been highlighted. Due to low transformation temperature, ease of purification, transparency, minimized convection effects and wider choice of materials, organic systems are better than those of metallic systems for detailed investigation of the parameters which control the mechanism of solidification, which in turn, controls the properties of materials. Organic monotectic systems, suitable for experiments under reduced gravity condition, are potentially useful to explore new manufacturing techniques to get novel materials to cater the needs of modern civilization.
Monotectic Crystallization; Binary Monotectics; Binary Organic Solidification; Mechanism of Solidification
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