|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Advanced Manufacturing
||Finite Element Modelling of Current-activated, Pressure-assisted Densification (CAPAD): The Role of Materials Properties and Geometry on Thermal Gradients
||Meir Shachar, Alexander Dupuy, Yasuhiro Kodera, Javier Garay
|On-Site Speaker (Planned)
Current-activated, pressure-assisted densification (CAPAD) is a densification process that uses electrical currents to heat the sample and its holder under elevated pressures. Also known as spark plasma sintering, CAPAD is renowned for being able to deliver high heating rates (up to 600°C/min) to its samples, reducing conventional processing times from hours to minutes. To better understand the CAPAD system and to investigate the impacts of design choices on operating conditions, a finite element model of CAPAD was constructed via COMSOL. The model has the capability to compute mechanical, thermal, and electrical variables at all points of space and time. Steady state and transient state studies were conducted for sweeps of sample material parameters (thermal conductivity, electrical conductivity, and heat capacity) and system geometry. Analysis of temperature gradients within samples are performed as a function of these sweeps. Key insights for the control of temperature gradients are discussed.
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