About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrahigh-Temperature Processing and Manufacturing
|
| Presentation Title |
Electric current accelerates diffusion by many orders of magnitude: e.g Tungsten sintered at 1200oC in five seconds |
| Author(s) |
Rishi Raj |
| On-Site Speaker (Planned) |
Rishi Raj |
| Abstract Scope |
Flash-sintering, so called because zirconia which nominally requires several hours at 1400 C could be sintered in a few seconds at 800oC with ultra-low electrical power. The “flash” event is symbolized by bright electroluminescence. In the last two-three years the flash phenomenon has been shown to apply equally to refractory and to main group metals. The underlying mechanism is attributed to the generation of colossal concentration of defects that segregate into crystalline colonies of vacancies. Other manifestations, including the generation of a surface plasma, and great acceleration of chemical reactions in solid state chemistry, e.g. conversion of ZnS into ZnO, spell a new era which we call Flash-Plus. Its impact is predicted to span from basic science (metallurgy, materials science, physics and chemistry) to creation of far from equilibrium materials with novel properties, to desktop manufacturing. These concepts will be justified. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Copper / Nickel / Cobalt, Other |