Abstract
The recrystallized graphites were prepared with calcined coke filler, coal-tar pitch binder and additives of B4C, Si, Ti by the hot-pressing in order to investigate the thermo-mechanical properties and microstructure of the recrystallized graphites. Radiation damages of the recrystallized graphites by ion bombardment in HT-7 fusion environment were also studied. The experimental results showed that the recrystallized graphites doped 10%B4C exhibited higher bending strength, up to 104 Mpa, but lower thermal conductivity; on the contrary, the recrystallized graphites doped Si and Ti exhibited higher thermal conductivity but lower bending strength. Compared with pure graphite, the erosion-resistant of the recrystallized graphites was improved obviously. The thickness of the gradient SiC coating of BSTDG was thinned from 40~50 μm to 5 μm, and the coating flaked off partially after irradiation in HT-7 Tokamak.
| Original language | English |
|---|---|
| Pages (from-to) | 318-322 |
| Number of pages | 5 |
| Journal | Hejubian Yu Dengliziti Wuli/Nuclear Fusion and Plasma Physics |
| Volume | 26 |
| Issue number | 4 |
| State | Published - Dec 2006 |
Keywords
- Chemical erosion
- Doped graphite
- Plasma facing materials
- SiC gradient coating