【摘 要】
：
Tungsten-based materials form a prime candidate of plasma facing components in fusion power reactors,and are subject to substantial amount of radiation damage from the bombardments of fast neutrons,as
【机 构】
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School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100
【出 处】
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第13届中日双边先进能源系统和聚变裂变工程材料会议(CIS-13)
论文部分内容阅读
Tungsten-based materials form a prime candidate of plasma facing components in fusion power reactors,and are subject to substantial amount of radiation damage from the bombardments of fast neutrons,as well as He and H-isotopes.In this study,we focus on the effects of helium in pure W,W-5wt.%Re and W-5wt.%Ta.In situ irradiations with 10 keV He+ions were carried out at Shimane University(Japan),at a flux of 5×1016 He+/m2/s,and were held at intervals of(0.45; 0.9; 1.2; 1.5)× 1020 He+/m2.The temperature range investigated covered from 773 K to 1473 K.Detailed defect microscopy were performed,including size,population and spatial distributions of radiation-induced bubbles and dislocations.Furthermore,He/vacancy ratios were extracted from these data,and their correlations with the radiation temperature,fluence(He concentration)as well as alloying elements Re/Ta were examined.These analyses allowed comprehensive insights on the role of helium upon radiation defect production and microstructural evolution in tungsten.
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