A method for obtaining surface diffusion coefficients from initial sintering data.

Abstract

Kinetic equations for initial sintering were derived from the viewpoint of concurrent surface and volume diffusion and combined surface and grain boundary diffusion. The equation successfully described the shrinkage data of spherical copper studied by other authors and the surface diffusion coefficient obtained agreed very well with the data which were obtained from other methods. The equations were also applied to the isothermal shrinkage data of A 3 in air at 1 1 8 0 to 1 2 6 0 and the surface diffusion coefficients obtain ed were in good agreement with those obtained by other authors.

Evaluation of Energy Consumption in Ceramic Fabrication Process for Alumina Ceramics with Diverse Particle Sizes

“…In the case of the sintering by the volume diffusion coefficient of alumina, sintering temperature to reach relative density of 98 % as a function of particle size was estimated using Eq. ( 1) with l of 3, D of 0.138 exp (-2,330 / T) m 3 /s [3], a 0 of 220 nm and T 0 of 1300 [4]. According to Eq.…”