D-T中子发生器用氚钛靶的存储时间对其结构稳定性的影响
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摘要
氚钛靶是D-T中子发生器的重要元部件,氚钛靶在存储过程中存在着内部氚衰变并积累氦的过程,氦泡的形成将对氚钛膜的稳定性产生重要影响,因此研究存储数年的氚钛靶的辐照损伤效应对了解氚钛靶的有效使用寿命有重要意义。采用扫描电镜及其附带的能谱和X射线衍射对氚钛靶表层进行检测发现:束流辐照以后氚钛靶表层元素主要为Mo和少量的Ti,表面不存在任何氚化物的物相结构。结果表明:氚钛靶在长达12年的存储时间内,表层氚化钛有效层存在大量脱落的现象。
Tritium titanium target is an important assembly used in a D-T type neutron generator,the coexistence of the decayed helium and hydrogen isotope is inevitable in tritium-contained materials,and the stability of the tritium titanium target is influenced by the inner evolution of helium bubbles.It is therefore of essence to study the effect of ion irradiations on the lifetime of tritium titanium targets with a long storage time in a neutron generator.The surface morphologies,surface element types and surface phase structures were analyzed for the original or irradiated tritide targets.Results show that Mo and Ti are the main elements remaining on the irradiated surface,and hardly any trace of Ti or Ti Tx could be detected on the surface.It is concluded that after a storage time of nearly 12 years,the main part of the tritide film are striped by inner evolved helium bubbles.
Tritium titanium target is an important assembly used in a D-T type neutron generator,the coexistence of the decayed helium and hydrogen isotope is inevitable in tritium-contained materials,and the stability of the tritium titanium target is influenced by the inner evolution of helium bubbles.It is therefore of essence to study the effect of ion irradiations on the lifetime of tritium titanium targets with a long storage time in a neutron generator.The surface morphologies,surface element types and surface phase structures were analyzed for the original or irradiated tritide targets.Results show that Mo and Ti are the main elements remaining on the irradiated surface,and hardly any trace of Ti or Ti Tx could be detected on the surface.It is concluded that after a storage time of nearly 12 years,the main part of the tritide film are striped by inner evolved helium bubbles.
引文
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[4]Cheng G J,Shi L Q,Zhou X S et al.Journal of Nuclear Materials[J],2015,466:615
[5]Zhang F F,Wang X,Jonathan B et al.Scripta Materialia[J],2015,109:28
[6]Zhou X S,Zhang L,Wang W D et al.Journal of Nuclear Materials[J],2015,461:157
[7]Liu J W,Liu Y,Qin X B et al.Vacuum[J],2014,99:62
[8]Yao Ze’en(姚泽恩),Chen Shangwen(陈尚文),Dong Mingyi(董明义)et al.Atomic Energy Science and Technology(原子能科学技术)[J],2003,37(1):25
[9]Pu Yubo(朴禹伯),Niu Zhanqi(牛占歧),Wang Xuezhi(王学智)et al.Atomic Energy Science and Technology(原子能科学技术)[J],1993,27(3):193
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[11]EI-Atwani O,Hattar K,Hinks J A et al.Journal of Nuclear Materials[J],2015,458:216