Calcium Evaporation from Metallurgical Grade Silicon by an Electron Beam Melting
In order to investigate Ca evaporation behavior in the electron beam melting process, metallurgical-grade silicon was melted in an electron beam furnace with different experimental conditions. The results showed that the content of impurity Ca was significantly decreased in the early time, while these changed slowly with the extension of the melting. The removal rate of Ca was controlled by the transfer of Ca atoms from the bulk liquid silicon to liquid/gas phase interface within the range of experiment temperature.
Yi Tan and Dongying Ju
W. Dong et al., "Calcium Evaporation from Metallurgical Grade Silicon by an Electron Beam Melting", Materials Science Forum, Vols. 675-677, pp. 41-44, 2011