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金玉花,贺冉,张学希,乔丽,王鹏.氦离子预注入对钨中氘滞留行为的影响[J].稀有金属材料与工程(英文),2020,49(10):3498~3504.[Jin Yuhua,He Ran,Zhang Xuexi,Qiao Li and Wang Peng.Effect of helium ion pre-implantation on deuterium retention behavior in tungsten[J].Rare Metal Materials and Engineering,2020,49(10):3498~3504.]
Effect of helium ion pre-implantation on deuterium retention behavior in tungsten
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Received:October 12, 2019  Revised:November 11, 2019
DOI:
Key words: tungsten  helium pre-implantation  deuterium  GD-OES  retention
Foundation item:国家重点研发计划“政府间国际科技创新合作专项”磁约束核聚变能发展研究项目(2017YFE0302500),自然科学基金面上项目(11875305)。
Author NameAffiliation
Jin Yuhua,He Ran,Zhang Xuexi,Qiao Li and Wang Peng  
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Abstract:
      The effect of high-energy helium ion pre-implantation on deuterium retention behavior in tungsten was studied by using high-energy ion implanter and linear experimental plasma system (LEPS). FIB-SEM, TEM, GD-OES and TDS measurements were used to analyze the effect of helium ion pre-implantation on deuterium retention in tungsten from both microstructure and deuterium concentration depth profile. The results show that a large number of helium bubbles are formed in the irradiated area by implantation of helium ions. After deuterium plasma exposure, the number of deuterium bubbles are was significantly lower than that of sample without helium ion pre-implantation. GD-OES analysis shows that deuterium concentration depth profile increases obviously at the helium capture position, and the helium ion pre-implantation increases the diffusion depth of deuterium in tungsten. TDS analysis also shows that helium ion pre-implantation increases the retention of deuterium in tungsten. This can be attributed to the defects formed after helium ions pre-implantation provide a large number of new trap sites for deuterium capture in tungsten, which leads to the significant increase of deuterium retention in tungsten.