Saved in:
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2308.16358 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914680824397824 |
|---|---|
| author | Lin, Zihan Monton, Carlos Bringuier, Stefan Sinclair, Gregory Cheng, Guangming Marin, Eduardo Bergstrom, Zachary Rudakov, Dmitry Popović, Žana Losada, Ulises Bykov, Igor Ostrowski, Evan T. Abe, Shota Yao, Nan Koel, Bruce E. Abrams, Tyler |
| author_facet | Lin, Zihan Monton, Carlos Bringuier, Stefan Sinclair, Gregory Cheng, Guangming Marin, Eduardo Bergstrom, Zachary Rudakov, Dmitry Popović, Žana Losada, Ulises Bykov, Igor Ostrowski, Evan T. Abe, Shota Yao, Nan Koel, Bruce E. Abrams, Tyler |
| contents | W-SiC composite material is a promising plasma-facing material candidate alternative to pure W due to the low neutron activation, low impurity radiation, and low tritium diffusivity of SiC while leveraging the high erosion resistance of the W armor. Additionally, W and SiC have high thermomechanical compatibility given their similar thermal expansion rates. The present study addresses the synthesis and performance of compositionally graded W-SiC films fabricated by pulsed-DC magnetron sputtering. Compositional gradients were characterized using transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS), and crystallographic information was obtained using electron diffraction and X-ray diffraction (XRD). Samples were exposed to L-mode deuterium plasma discharges in the DIII-D tokamak using the Divertor Material Evaluation System (DiMES). Post-mortem characterizations were performed using scanning electron microscopy (SEM) and XRD. Electron diffraction and XRD showed that the compositionally graded W-SiC films were composed of polycrystalline W and amorphous SiC with amorphous W+SiC interlayers. No macroscopic delamination or microstructural changes were observed under mild exposure conditions. This study serves as a preliminary examination of W-SiC compositionally graded composites as a potential candidate divertor material in future tokamak devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_16358 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Investigation of W-SiC compositionally graded films as a divertor material Lin, Zihan Monton, Carlos Bringuier, Stefan Sinclair, Gregory Cheng, Guangming Marin, Eduardo Bergstrom, Zachary Rudakov, Dmitry Popović, Žana Losada, Ulises Bykov, Igor Ostrowski, Evan T. Abe, Shota Yao, Nan Koel, Bruce E. Abrams, Tyler Plasma Physics Materials Science W-SiC composite material is a promising plasma-facing material candidate alternative to pure W due to the low neutron activation, low impurity radiation, and low tritium diffusivity of SiC while leveraging the high erosion resistance of the W armor. Additionally, W and SiC have high thermomechanical compatibility given their similar thermal expansion rates. The present study addresses the synthesis and performance of compositionally graded W-SiC films fabricated by pulsed-DC magnetron sputtering. Compositional gradients were characterized using transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS), and crystallographic information was obtained using electron diffraction and X-ray diffraction (XRD). Samples were exposed to L-mode deuterium plasma discharges in the DIII-D tokamak using the Divertor Material Evaluation System (DiMES). Post-mortem characterizations were performed using scanning electron microscopy (SEM) and XRD. Electron diffraction and XRD showed that the compositionally graded W-SiC films were composed of polycrystalline W and amorphous SiC with amorphous W+SiC interlayers. No macroscopic delamination or microstructural changes were observed under mild exposure conditions. This study serves as a preliminary examination of W-SiC compositionally graded composites as a potential candidate divertor material in future tokamak devices. |
| title | Investigation of W-SiC compositionally graded films as a divertor material |
| topic | Plasma Physics Materials Science |
| url | https://arxiv.org/abs/2308.16358 |