The creep rate of polycrystalline Fe3O4 was measured as a function of stress and oxygen partial pressure at 480 to 1100C. A regime of power law creep was found at high stresses. A regime of diffusional flow was found at lower stresses and was interpreted as being Nabarro-Herring creep. The data for the two regimes were combined to deduce the O diffusion coefficient:

D(m2/s) = 10-5 exp[-264(kJ/mol)/RT]

A.G.Crouch, J.Robertson: Acta Metallurgica et Materialia, 1990, 38[12], 2567-72