Question: Diffusion creep is, among other things, dependent on the diffusivity of the ions involved. If all other parameters are equal and if the grain boundary

Diffusion creep is, among other things, dependent on the diffusivity of

Diffusion creep is, among other things, dependent on the diffusivity of the ions involved. If all other parameters are equal and if the grain boundary diffusivity is given by Dgb=110exp(40KJ/RT) and the bulk diffusion coefficient is given by Dlatt=321exp(50kJ/RT) Determine whether grain boundary (Coble Creep) or lattice diffusion (Nabarro-Herring Creep) will dominate at 709K. To record your final answer, enter 1 for Coble Creep or 2 for Nabarro-Herring Creep

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