D2 retention behavior and microstructural evolution of W-2wt.%Y2O3 alloy during He-ion irradiation at high temperatures
D2 retention behavior and microstructural evolution of W-2wt.%Y2O3 alloy during He-ion irradiation at high temperatures
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DOI：
10.1016/j.jnucmat.2020.152273
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发表时间：
2020-06
影响因子：
3.1
通讯作者：
Qiu Xu;L. Luo;Z. Chen;M. Hirakawa;M. Miyamoto;Hongyingnan Chen;Koichi Sato;H. Tsuchida
中科院分区：
文献类型：
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作者：
Qiu Xu;L. Luo;Z. Chen;M. Hirakawa;M. Miyamoto;Hongyingnan Chen;Koichi Sato;H. Tsuchida
在本研究中，我们进行了弥散强化W-2wt的预辐照。用高能铁离子代替中子的y2o3合金具有良好的机械性能。研究了预辐照对合金d2保留行为的影响。用5 kev的离子对样品进行了最大1022D/m2的辐照，并以1 MeV的能量进行了铁预辐照，离子辐照量可达4 × 1018/m2。为了比较，还研究了商业纯W。fe -离子预辐照工艺提高了纯W和W - y2o3合金中d2的保留率。然而，这种d2滞留与辐照前剂量无关。此外，还研究了1.8 × 1021He/m2辐照和773、973、1173 K高温下w - y2o3合金中He气泡的形成。当辐照剂量超过1.5 × 1020He/m2时，形成明显的He气泡，随着辐照剂量的增加，He气泡增大，空隙膨胀增大。与纯W相比，W - y2o3合金的空洞膨胀受到抑制。这可归因于由于氦辐照引起的空位和He原子的弥散。
In this study, we carried out the pre-irradiation of a dispersion-strengthened W-2wt.%Y2O3alloy with good mechanical properties with high-energy Fe-ions instead of neutrons. The effect of this pre-irradiation on the D2retention behavior of the alloy was investigated. A maximum of 1022D/m2was irradiated onto the samples using 5-keV D2ions, and Fe pre-irradiation was carried out up to an ion fluence of 4 × 1018/m2with 1 MeV energy. For comparison, commercial pure W was also studied. The Fe-ion pre-irradiation process increased the D2retention in both pure W and the W–Y2O3alloy. However, this D2retention was independent of the pre-irradiation dose. In addition, the formation of He bubbles in the W–Y2O3alloy caused by the irradiation at 1.8 × 1021He/m2and high temperatures of 773, 973, and 1173 K was also investigated. When the irradiation dose exceeded 1.5 × 1020He/m2, visible He bubbles were formed, and He bubbles grew and void swelling increased with an increase in the irradiation dose. Compared to pure W, the W–Y2O3alloy showed suppressed void swelling. This can be attributed to the dispersion of vacancies and He atoms due to the He irradiation.