Effects of Particle Packing Characteristics on Solid‐State Sintering
- 1 May 1989
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 72 (5) , 810-817
- https://doi.org/10.1111/j.1151-2916.1989.tb06222.x
Abstract
Alumina compacts fabricated with different green densities and different pore size distributions were characterized and the changes of the pore characteristics during solid‐state sintering were studied. A critical ratio of pore size to mean particle size for pore shrinkage was determined. Porosity in the compact could be classified into two classes: the first class contains pores smaller than the critical ratio, and the second class contains pores larger than the critical ratio. Pores belonging to a different class of porosity behaved differently during sintering. Pores larger than the critical ratio were not totally eliminated during sintering. The first class of porosity controlled the ultimate sintering shrinkage, and the second class of porosity controlled the final sintered density.Keywords
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