Effect of Cr contents on the diffusion behavior of Te in Ni-based alloy
Jia, YY; Li, ZF; Ye, XX; Liu, RD; Leng, B; Qiu, J; Liu, M; Li, ZJ
2017
发表期刊JOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
卷号497期号:-页码:101-106
文章类型期刊论文
摘要The embrittlement of Ni-based structural alloys caused by fission production Te is one of the major challenges for molten salt reactors. It has been reported that solution element Cr can prevent the situation of intergranular cracks caused by Te. However, there is no detailed mechanism explanation on this phenomenon. In this study, the effect of Cr on Te diffusion in Ni-Cr binary system was investigated by diffusion experiments at 800 degrees C for 100 h. Results show that Te reacts with the alloy mainly forming Ni3Te2 , and strip shaped Cr3Te4 is only found on the surface of Ni-15%Cr alloy. According to the discussion of thermodynamic chemical reaction process, Cr3Te4 exhibits the best stability and preferential formation compound in Te/Ni-Cr system as its Gibbs free energy of formation is the lowest. With the increase of Cr content in the alloy, the diffusion depth of Te along grain boundaries significantly decreases. Moreover, the formation process of reaction product and diffusion process are described. The diffusion of Te can be suppressed by high content of Cr in Ni-Cr alloy due to the formation of Cr3Te4 and thus the grain boundary is protected from Te corroding. (C) 2017 Elsevier B.V. All rights reserved.
关键词Molten-salt Reactor Tellurium Corrosion Nickel Superalloy Chemistry
DOI10.1016/j.jnucmat.2017.10.062
关键词[WOS]MOLTEN-SALT REACTOR ; TELLURIUM ; CORROSION ; NICKEL ; SUPERALLOY ; CHEMISTRY
收录类别SCI
语种英语
WOS记录号WOS:000415718800011
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28623
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Jia, YY,Li, ZF,Ye, XX,et al. Effect of Cr contents on the diffusion behavior of Te in Ni-based alloy[J]. JOURNAL OF NUCLEAR MATERIALS,2017,497(-):101-106.
APA Jia, YY.,Li, ZF.,Ye, XX.,Liu, RD.,Leng, B.,...&Li, ZJ.(2017).Effect of Cr contents on the diffusion behavior of Te in Ni-based alloy.JOURNAL OF NUCLEAR MATERIALS,497(-),101-106.
MLA Jia, YY,et al."Effect of Cr contents on the diffusion behavior of Te in Ni-based alloy".JOURNAL OF NUCLEAR MATERIALS 497.-(2017):101-106.
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