Process Analyses and Control in Spark Sintering for Powders having a Low Sinterability

概要

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A lot of powders having a low sinterability show the attractive properties for the industrial applications in the point of the energy conservation. The relation between their powders and process parameters in spark sintering was reported for production of sintered compacts with high efficiency and multifunction. The non-equilibrium phase (supersaturated aluminum solid solution), carbides (WC and Cr3C2), oxide (Al2O3), sulfides (MoS2 and WS2), borides (FeB and Fe2B), vapor grow carbon fibers and their composites, were chosen as attractive powders having a low sinterability. The behaviors and process analyses of the spark sintering for their powders were investigated experimentally and theoretically. These compounds were successfully consolidated and showed high densities. Some unique phenomena such as retardation of grain growth, suppression of thermal decomposition and maintenance of initial non-equilibrium phases, were observed by the proper control of process in spark sintering.