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O(minus 2) grain boundary diffusion and grain growth in pure dense MgO

C. M. KAPADIA, M. H. Leipold

Abstract

Grain growth behavior in fully dense compacts of MgO of very high purity was studied, and the results compared with other similar behaving materials. The activation energy for the intrinsic self-diffusion of Mg(2minus) is discussed along with the grain boundary diffusion of O(2minus). Grain boundary diffusion of O(2minus) is proposed as the controlling mechanism for grain growth.

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Available abstract

Key concepts: Grain boundary diffusion coefficient, Grain growth, Effective diffusion coefficient, Grain boundary, Diffusion, Materials science, Activation energy, Grain boundary strengthening