About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Interactions between Energy and Materials
|
| Presentation Title |
Generation of a Plasma during Flash and Its Migration Under Magnetic Fields, and It Application to Touch-Free Flash Sintering |
| Author(s) |
Rishi Raj, Zeynep Cetinkaya |
| On-Site Speaker (Planned) |
Rishi Raj |
| Abstract Scope |
We show that flash created with electrical current within a “reactor” can be migrated into a free standing workpiece of an arbitrary shape without electrodes. The workpiece flashes and sinters. The extent of sintering depends on the strength of the induction current that powers the magnetic field. Processing maps, for two ceramic oxides, that carve out the range of reactor current and induction current within which good sintering behavior is observed, are presented. The effect is apparently related to a plasma which migrates into the workpiece, under magnetic fields, thereby creating an additional pathway for current; this effect is reflected in a lower resistive load at the power supply that feeds electrical energy into the reactor. In this way the “short-circuit-like” resistance of the plasma current is quantified. The relationship of this resistance to the design of reactor for “touch-free” sintering is presented. |