Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1792054 | Journal of Crystal Growth | 2011 | 5 Pages |
The interaction of nitrogen with liquid and solid silicon at high temperature is investigated in an electromagnetic levitation set-up. It is shown that the nucleation undercooling of Si decreases monotonically from 300 to 1 K when the concentration of nitrogen in the solidified droplet increases from 0 to 600 ppmw. Several α- and β-Si3N4 morphologies are observed and their growth conditions are linked to the various stages of the Si droplet cooling down. It follows that electromagnetic levitation is a valuable tool for investigation of the chemical behavior of highly reactive liquids at high temperature.
► Interaction of nitrogen with silicon at high temperature. ► Silicon nucleation undercooling decreases when concentration of nitrogen increases. ► Growth conditions of several α- and β-Si3N4 morphologies have been observed.