Chill-Block Melt Spin Technique
Pp. 42-69 (28)
M. Kamal and Usama S. Mohammad
Chill-Block Melt Spin (CBMS) technique is the most important rapid solidification process because of
its low-costs and flexibility compared to other technologies such as drop tubes and atomization rapid
solidification. Mathematical analysis with experiments have revealed that thermal transport is the predominant
over momentum transport for ribbon formation and substrate nature and speed control the cooling rates.
Microstructural anatomy of the melt-spun ribbons shows a scale-up in the grain size from the wheel side towards
the ribbon upper free surface with clear effect of convection-induced instabilities that affect the local cooling
rates and microstructures for near Newtonian cooling conditions.
Rapid solidification, chill block melt spin, undercooling, metastable phase, cooling rate, thermal
momentum transfer modeling.
Chairman and Professor of Metal Physics, IUPAP-C5 Member, Department of Physics, Faculty of Science, Mansoura University, Al-Mansoura, Egypt.