Analysis of Mechanisms of Spark-Plasma Sintering
Spark-Plasma Sintering (SPS) involves rapid heating of powder by electric current with simultaneous application of external pressure. Numerous experimental investigations point to the ability of SPS to render highly-dense powder products with the potential of grain size retention. The latter ability is of significance for the consolidation of nano-powder materials where the grain growth is one of the major problems. A model for spark-plasma sintering taking into consideration various mechanisms of material transport is developed. The results of modeling agree satisfactorily with the experimental data in terms of SPS shrinkage kinetics.
Wei Pan and Jianghong Gong
E. Olevsky et al., "Analysis of Mechanisms of Spark-Plasma Sintering", Key Engineering Materials, Vols. 368-372, pp. 1580-1584, 2008