SILICON-CARBIDE CONTROL IN THE EFG SYSTEM

Magnetic and thermal models of the EFG system and a model describing the transport of carbon in silicon melt within the capillary of a graphite die were used to determine the critical parameters controlling silicon carbide precipitation on the die walls. A new die tip design based on the computational findings proved to be more effective in reducing the amount of silicon carbide precipitation and increased the useful life of the die.