Investigation of Nanostructure Formation of Alumina by Magnetic Pulse Compression and Subsequent Spark Plasma Sintering

Comparative analysis of the structure and properties of samples prepared from alumina nanopowder using conventional or magnetic pulse compression (MPC), and the subsequent spark plasma sintering (SPS) was performed. In sintered corundum first identified the presence of areas with bimodal structure and the regularities of their formation. It was concluded that one of the most promising technologies for creating nanostructured ceramics is the application of the MPC and the SPS. Alumina submicron structure was obtained with a grain size of about 200-300 nm. The relative density of these samples determined by hydrostatic method was 95-96% of the theoretical.