C. Aragon et al., DETERMINATION OF CARBON CONTENT IN MOLTEN STEEL USING LASER-INDUCED BREAKDOWN SPECTROSCOPY, Applied spectroscopy, 47(5), 1993, pp. 606-608
Laser-induced breakdown spectroscopy has been applied to the determina
tion of carbon content in steel samples melted in a laboratory inducti
on furnace. A focused Nd:YAG laser beam was used to generate the plasm
a on the liquid surface in argon atmosphere. The precision obtained is
10% for carbon contents in the range 150-1100 ppm, and the detection
limit is 250 ppm. The present results show that this technique can be
applied for direct composition determination in molten alloys.