Properties of carbon deposits on tungsten nano-structure
Abstract
C deposition characteristics on W nano-structure by two different deposition methods are investigated to study C deposition mechanisms on W nano-structure and its characteristics. The two methods were as follows: irradiation by mixed D and C ion beam, and deposition by magnetron sputtering. Differences on deposition condition such as deposition temperature, incident species and energy affected properties of C deposits. Structure of C deposits was investigated by SEM and Raman spectroscopy. D retention properties were investigated by thermal desorption spectroscopy. It was found that C deposits on nano-structured surface have low internal stress and porous structure compared with C deposits on flat surfaces. Increase of CD4 release from C deposition layers on nano-structured surface was investigated by TDS. These results showed the effects of nano-structure on structure and thermal desorption properties of C deposits.
- Publication:
-
Journal of Nuclear Materials
- Pub Date:
- July 2013
- DOI:
- 10.1016/j.jnucmat.2013.01.206
- Bibcode:
- 2013JNuM..438S.949H