|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Influence of Loading Modes in Spark Plasma Sintering
||Xialu Wei, Eugene Olevsky
|On-Site Speaker (Planned)
Two loading modes, free-forging (upsetting with free lateral surface) and rigid die pressing are employed in spark plasma sintering (SPS) system to consolidate porous ceramics. It is shown that these two loading modes provide different levels of densification under the same axial pressure applied during the SPS process. Theoretical studies have been carried out to investigate the densification kinetics induced by the loading schematics. The studies suggest that the above mentioned loading modes can be properly combined to achieve the highest final relative density. The derived densification expressions also promote a way to evaluate the creep parameters of the utilized material under SPS conditions. The reliabilities of the modeling results are confirmed by comparing them to the outcomes of a series of specially designed experiments. The developed modeling-based concept of optimal SPS pressure mode is used as a basis for innovative SPS tooling design facilitating higher efficiency of consolidation.