Effect of Cr contents on the diffusion behavior of Te in Ni-based alloy

doi:10.1016/j.jnucmat.2017.10.062

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	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
ISSN	0022-3115
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
DOI	10.1016/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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