Effect of grain boundary carbides on the diffusion behavior of Te in Ni-16Mo-7Cr base superalloy
Effect of grain boundary carbides on the diffusion behavior of Te in Ni-16Mo-7Cr base superalloy
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Ni-16Mo-7Cr基高温合金中晶界碳化物对Te扩散行为的影响
DOI：
10.1016/j.matchar.2020.110329
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发表时间：
2020-06
影响因子：
4.7
通讯作者：
Xingtai Zhou
中科院分区：
文献类型：
--
作者：
Fenfen Han;Xiaodong Wang;Yanyan Jia;Min Liu;Bin Leng;Renduo Liu;Hefei Huang;Xingtai Zhou
裂变产物Te可能导致Ni-16Mo-7Cr高温合金晶间脆化，威胁熔盐堆的安全。尽管Te的脆化现象已被广泛报道，但关于析出晶界碳化物（M12C）对长期服役合金中Te扩散行为的影响的研究却很少。本研究研究了M12C对Ni-16Mo-7Cr合金中Te扩散行为的影响。结果表明，经过长期热暴露后，合金晶界处沿M12C方向形成了Cr3Te4和Ni3Te2。然而，M12C碳化物和碲化物的形成对Te在合金中的扩散影响不大。
Fission product Te could result in intergranular embrittlement of Ni-16Mo-7Cr superalloy and threaten the safety of molten salt reactor. Although embrittlement of Te has been reported widely, there are few researches about the influence of precipitated grain boundary carbides (M12C) on the diffusion behavior of Te in the alloy with long term service. In this study, the effect of M12C on the diffusion behavior of Te in Ni-16Mo-7Cr alloy was studied. The results showed that Cr3Te4and Ni3Te2were formed along M12C at the grain boundary of alloy after long-term thermal exposure. However, the formation of M12C carbides and tellurides had little impact on the diffusion of Te in the alloy.
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