Investigation of Plasma Material Erosion Under Mechanical Stress
| Autor: | Mitchell L. R. Walker, Julian J. Rimoli, Aaron M. Schinder |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
020301 aerospace & aeronautics
Materials science Ion beam Mechanical Engineering Aerospace Engineering 02 engineering and technology Plasma 01 natural sciences Thermal expansion 010305 fluids & plasmas Stress (mechanics) Fuel Technology 0203 mechanical engineering Space and Planetary Science Hall effect Thermocouple 0103 physical sciences Surface roughness Forensic engineering Erosion Composite material |
| Zdroj: | Journal of Propulsion and Power. 33:433-447 |
| ISSN: | 1533-3876 0748-4658 |
| Popis: | The operational lifetime of traditional Hall effect thrusters is limited by the erosion of the discharge channel walls. Erosion during long-duration life testing of Hall effect thrusters produces surface features that are unexplained by present models. Anomalous erosion ridges are one such unexplained feature. Hall effect thrusters are also expected to be under moderate (100 kPa to 6 MPa) thermomechanical stresses when operating, due to heat loads from the plasma. Thus, there may be a relationship between mechanical stress and the erosion features observed in Hall effect thrusters. This work investigates the plasma erosion of materials placed under mechanical loads. An experiment is designed to detect any changes to the erosion of material samples due to stress. Amorphous fused-silica samples are investigated in this paper. Fused silica erodes quickly and has no material heterogeneity. Three pairs of fused-silica samples, each pair with one control sample and one sample loaded to 6.0, 14.4, and 25.0±1.1 ... |
| Databáze: | OpenAIRE |
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