| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
Effects of Oxygen Partial Pressure on the Surface Tension of Liquid Aerospace Alloys |
| Author(s) |
Michael Sansoucie, Gwendolyn Bracker, Elizabeth Hodges, Madeline Scott, Robert Hyers |
| On-Site Speaker (Planned) |
Michael Sansoucie |
| Abstract Scope |
Oxygen partial pressure can considerably influence the surface tension of liquid metals.
The NASA Marshall Space Flight Center’s electrostatic levitation (ESL) laboratory has an oxygen partial pressure control system that allows the oxygen partial pressure within the vacuum chamber to be measured and controlled in the range from 10-28 to 10-9 bar.
The MSFC ESL lab's oxygen control system consists of an oxygen sensor, oxygen pump, and a control unit. The oxygen sensor is a potentiometric device that determines the difference in oxygen activity in two gas compartments separated by an yttria-stabilized zirconia electrolyte. The pump utilizes coulometric titration to either add or remove oxygen.
The effects of oxygen partial pressure on the surface tension of molten aerospace alloys were determined, and the results will be presented. The surface tension was measured at several different oxygen partial pressures using the oscillating drop method. |
| Proceedings Inclusion? |
Planned: Publication Outside of TMS |