汪京  (副研究员)

Suppression of vacancy formation and hydrogen isotope retention in irradiated tungsten by addition of chromium

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DOI码：10.1016/j.jnucmat.2021.153449

发表刊物：Journal of Nuclear Materials

关键字：Tungsten, Chromium, Deuterium retention, Ion irradiation

摘要：To study the effect of the content of chromium (Cr) in the tungsten (W) matrix on the vacancy formation and retention of hydrogen isotopes, the samples of the W-0.3 at.% Cr alloy were irradiated with 6.4 MeV Fe ions in the temperature range of 523–1273 K to a damage level of 0.26 displacement per atom (dpa). These displacement-damaged samples were exposed to D 2 gas at a temperature of 673 K and a pressure of 100 kPa to decorate ion-induced defects with deuterium. The addition of 0.3 at.% Cr into the W matrix resulted in a significant decrease in the retention of deuterium compared to pure W after irradiation especially at high temperature ( ≥773 K). Positron lifetime in W-0.3 at.% Cr alloy irradiated at 1073 K was almost similar to that for non-irradiated one. These facts indicate the suppression of the formation of vacancy-type defects (monovacancies and vacancy clusters) by 0.3 at.% Cr addition, which leads to the significant reduction in deuterium retention in W-0.3 at.% Cr alloy.

第一作者：Jing Wang

论文类型：期刊论文

通讯作者：Yuji Hatano

论文编号：153449

期号：559

是否译文：否

发表时间：2021-12-03

收录刊物：SCI