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The evolution of helium from aged Zr tritides: A thermal helium desorption spectrometry study
Journal of Nuclear Materials ( IF 2.8 ) Pub Date : 2017-12-08 , DOI: 10.1016/j.jnucmat.2017.11.013
G.J. Cheng , G. Huang , M. Chen , X.S. Zhou , J.H. Liu , S.M. Peng , W. Ding , H.F. Wang , L.Q. Shi

The evolution of He from Zr-tritides was investigated for aging times up to about 6.5 years using analytical thermal helium desorption spectrometry (THDS). Zr films were deposited onto Mo substrates and then converted into Zr-tritides (ZrT1.70∼1.95) inside a tritiding apparatus loaded with pure tritium gas. During aging, there are at least five forms of He in Zr-tritides, and more than 99% of He atoms are in the form of He bubbles. The isolated He bubbles in lattices begin to link with each other when the He/Zr atom ratio reaches about 0.21, and are connected to grain boundaries or dislocation networks at He concentration of He/Zr ≈ 0.26. An interconnected system of channels decorated by bubbles evolves from the network dislocations, dislocation loops and internal boundaries. These He filled networks are formed completely when the He/Zr atom ratio is about 0.38. Once the He/Zr reached about 0.45, the networks of He bubble penetrate to the film surface and He begins an “accelerated release”. This critical ratio of He to Zr for He accelerated release is much greater than that found previously for Ti-tritides (0.23–0.30). The difference of He retention in Zr-tritides and Ti-tritides was also discussed in this paper.



中文翻译:

老化的Zr t化物中氦的演化:热氦解吸光谱研究

使用分析型热氦解吸光谱法(THDS),研究了从Zr到Tritides的He的演化过程,直至约6.5年的老化时间。将Zr膜沉积在Mo衬底上,然后转化为Zr-三化物(ZrT 1.70〜1.95)内装有纯tri气的tri化装置内。在老化过程中,Zr-tritides中至少存在五种形式的He,并且超过99%的He原子以He气泡的形式存在。当He / Zr原子比达到约0.21时,晶格中孤立的He气泡开始相互连接,并在He / Zr≈0.26的He浓度下连接到晶界或位错网络。由气泡装饰的互连通道系统是从网络错位,错位循环和内部边界演变而来的。当He / Zr原子比约为0.38时,将完全形成这些He填充网络。一旦He / Zr达到约0.45,He气泡的网络就会渗透到薄膜表面,并且He开始“加速释放”。对于He加速释放,此He与Zr的临界比率比以前对Ti-三化物的临界比率(0.23-0.30)大得多。本文还讨论了Zr-tritides和Ti-tritides中He保留的差异。

更新日期:2017-12-08
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