A comparative computer simulation study was made of the structures and energies of {110} planar defects. It was shown that, unlike the case of Cu, the stacking-fault energy surfaces of Ir and Rh exhibited minima for shear that involved the a/4[1¯10] vector. An analysis of the gain in energy which occurred during dissociation of the a/2[1¯10] dislocations showed that, in Ir and Rh, this dislocation dissociated into two a/4[1¯10] partials on the {110} plane.

L.I.Yakovenkova, M.J.Rabovskaya, L.E.Karkina: Physics of Metals and Metallography, 1996, 82[3], 241-6