I've attached a lammps Tersoff bond order potential file for FeC. It contains the parameterisation for FeC that is part of the FeCrC system in J. Phys.: Condens. Matter 25 (2013) 445401 by K. O. E. Henriksson, C. Bjorkas and K. Nordlund and the parameterisation in Phys. Rev. B 79 (2009) 144107 by K. O. E. Henriksson and K. Nordlund (thanks Saurav Goel for the latter one). If anyone wants to use these potentials and save themselves the trouble of creating these files, you can use the file attached.
FeC.tersoff (1.72 KB)