Deuterium ion irradiation bas been carried out with incident energies of 100 eV and flux of 1 × 1022 D+m-2s -1 at a temperature in range between 333 K and 1130 K up to a dose of 1 × 1026 D+m-2. Three kinds of tungsten used are pure tungsten made by powder metallurgy tungsten (PM-W), vacuum plasma spray tungsten (VPS-W) and single crystal tungsten (SC-W). Surface morphology before and after the irradiation is observed with a SEM. Retention property of deuterium after the irradiation is also examined with a TDS. Blisters with a diameter of about 0.2-2.0 μ m are formed on PM-W by deuterium irradiation at 333 K and 673 K but size and shape of those blisters change depending on the irradiation temperatures. However, no blisters are found on PM-W at elevated temperatures between 723 and 1130 K. On the other hand, blisters with a diameter of about 2 μ m are formed on SCW irradiated at 343 K but no blisters are observed on SCW irradiated at 383, 623 and 1123 K. In the case of VPS-W irradiated at 333, 723 and 1123 K, modification like blister with a diameter of about 0.2 μ m occurs. TDS measurement also shows that deuterium is not retained in sample, which the blisters are not formed.
|出版ステータス||出版済み - 2003|
|イベント||20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03 - San Diego, CA, 米国|
継続期間: 10 14 2003 → 10 17 2003
|その他||20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03|
|City||San Diego, CA|
|Period||10/14/03 → 10/17/03|
All Science Journal Classification (ASJC) codes