Densification and grain growth during interface reaction controlled sintering of alumina ceramics

This paper investigates the evolution of densification and grain growth during free sintering of pure alumina ceramics. In earlier work, interface reaction process was verified the dominant sintering mechanism of stage 1 of sintering of the material prepared here. We also limit our attention to stage 1 of sintering, i.e. when the porosity is in the form of interconnected channels. Based on the experimental data obtained and the constitutive laws employed, activation energies of densification and grain growth are determined. Grain size-relative density plot is plotted to express the development of densification and grain growth.