1985•Journal of the American Ceramic SocietyRequires access

A Diffusion‐Compensation Relation for Normal Grain Growth and Grain‐Boundary Diffusion of Oxygen in Oxides

Raymond Joesten

Abstract

Values of D 0 /δ and Q for grain‐boundary diffusion, derived from published studies of normal grain growth in Al 2 O 3 , BeO, CaO, MgO, SiO 2 , and CaSiO 3 , are fit by the linear compensation equation log D 0 /δ=0.03170Q ‐7.6792 (r 2 =0.9384). Comparison of grain‐boundary diffusion coefficients derived from grain growth in oxides with those obtained by direct experimental measurement suggests that the kinetics of normal grain growth are controlled by grain‐boundary diffusion of oxygen.

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Key concepts: Grain boundary diffusion coefficient, Effective diffusion coefficient, Grain growth, Diffusion, Grain boundary, Materials science, Oxygen, Grain size