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Formation of the Ni31Si12 phase induced by the irradiation of nickel ions on the eutectic, α-Ni-Ni3Si-monoclinic, with a 380 dpa dose
Radiation Effects and Defects in Solids ( IF 1 ) Pub Date : 2020-07-16 , DOI: 10.1080/10420150.2020.1793338
Carlos Alberto Camacho-Olguín 1 , Arturo Garcia-Borquez 2 , Vicente Paz del Angel 3 , J. Ascencion Montoya-De La Fuente 3 , Carlos Alberto González-Rodríguez 1 , Luz María Ramos-Tercero 1 , Hector Cruz-Mejia 1 , Roberto A. Rodriguez-Diaz 4
Affiliation  

This investigation has been developed to determine which microstructural changes on the eutectic α-Ni-Ni3Si- monoclinic, if any exist, result from the irradiation with Ni-ions. SRIM program has been used to simulate the interaction of the irradiation with both α-Ni and Ni3Si- monoclinic phases. X-ray diffraction studies of irradiated and non-irradiated regions have allowed us to establish that the ion irradiation promote the formation of the Ni31Si12-hexagonal intermetallic phase with hexagonal structure. An analysis of the irradiated region by High Resolution Transmission Electron Microscopy (HRTEM) confirmed the presence of the Ni31Si12-hexagonal intermetallic phase, establishing at the same time, its crystallographic relationship with the matrix. Evidently, radiation-induced segregation could cause significant changes in the chemical composition of concentrated alloys. This experimental discovery, in particular, is significant because the formation of the Ni31Si12-hexagonal phase under irradiation conditions had never been mentioned before. Nonetheless, the formation of the Ni31Si12-hexagonal intermetallic phase represents an advance in the field of the microstructural modification by ion beam irradiation, and as a consequence of this finding, it is possible to establish that the structural stability of the eutectic form of the α-Ni-Ni3Si-monoclinic phases under severe irradiation conditions, is questionable.

中文翻译:

在 380 dpa 剂量下,通过镍离子辐照共晶、α-Ni-Ni3Si-单斜晶系诱导形成 Ni31Si12 相

本研究旨在确定共晶 α-Ni-Ni3Si-单斜晶系的哪些显微结构变化(如果存在)是由 Ni 离子辐照引起的。SRIM 程序已被用于模拟辐照与 α-Ni 和 Ni3Si-单斜相的相互作用。辐照和非辐照区域的 X 射线衍射研究使我们能够确定离子辐照促进了具有六方结构的 Ni31Si12-六方金属间相的形成。通过高分辨率透射电子显微镜 (HRTEM) 对照射区域的分析证实了 Ni31Si12-六方金属间相的存在,同时建立了其与基体的结晶关系。显然,辐射引起的偏析会导致浓缩合金的化学成分发生显着变化。这一实验发现尤其重要,因为之前从未提到过在辐照条件下形成 Ni31Si12-六方相。尽管如此,Ni31Si12-六方金属间相的形成代表了离子束辐照显微结构改性领域的进步,作为这一发现的结果,可以确定α的共晶形式的结构稳定性-Ni-Ni3Si-单斜相在严重辐照条件下是有问题的。很重要,因为之前从未提到过在辐照条件下形成 Ni31Si12-六方相。尽管如此,Ni31Si12-六方金属间相的形成代表了离子束辐照显微结构改性领域的进步,作为这一发现的结果,可以确定α的共晶形式的结构稳定性-Ni-Ni3Si-单斜相在严重辐照条件下是有问题的。很重要,因为之前从未提到过在辐照条件下形成 Ni31Si12-六方相。尽管如此,Ni31Si12-六方金属间相的形成代表了离子束辐照显微结构改性领域的进步,作为这一发现的结果,可以确定α的共晶形式的结构稳定性-Ni-Ni3Si-单斜相在严重辐照条件下是有问题的。
更新日期:2020-07-16
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