MODIFICATION OF THE INTERDIFFUSION PROCESS IN THE IRON-ALUMINUM SYSTEM VIA SPARK-PLASMA SINTERING / FIELD ASSISTED SINTERING

摘要

Utilizing the Spark Plasma Sintering (SPS) / Field Assisted Sintering Technology in electrically conductive samples, the pulsed direct current (DC) induces primarily Joule heating. Nevertheless, the applied DC is frequently reported to accelerate diffusion processes as compared with the conventional heating in a furnace. Thereby, after SPS treatment, the microstructural evolution is changed against the conventional heat treatment even if the diffusion processes run at the same temperature. These differences are attributed to various phenomena, whose characteristic significance depends on the material system. The present study of the reactive diffusion in the binary system Al-Fe aims at contributing to the discussion of the above phenomena.