An analysis was made of O migration near to a 60º dislocation, and of the consequent retardation of dislocation motion. Quantitative predictions were based upon a solution of the macroscopic equations for the transport of O in the elastic stress field that was created by the dislocation. The link, between the microscopic dynamics of interstitial O within the diamond lattice and macroscopic transport, was expressed in terms of a constitutive model for the dependence of the drift velocity and diffusivity of O upon the elastic interaction of O atoms and dislocations, and upon the temperature. The transport equation was solved numerically by assuming that the dislocation core was fully saturated with O. The drag force on the gliding dislocation, caused by the surrounding O, was deduced on the basis of linear elasticity theory.

D.Maroudas, R.A.Brown: Journal of Applied Physics, 1991, 69[7], 3865-77