Cr incorporated phase transformation in Y2O3 under ion irradiation

Li, Nan; Yadav, Satyesh Kumar; Xu, Yun; Aguiar, Jeffery; Baldwin, Jon Kevin Scott; Wang, Yongqiang; Luo, Hongmei; Misra, Amit; Uberuaga, Blas P.

doi:10.1038/srep40148

Title: Cr incorporated phase transformation in Y₂O₃ under ion irradiation

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Abstract

Under irradiation, chemical species can redistribute in ways not expected from equilibrium behavior. In oxide-dispersed ferritic alloys, the phenomenon of irradiation-induced Cr redistribution at the metal/oxide interfaces has drawn recent attention. Here, the thermal and irradiation stability of the FeCr/Y₂O₃ interface has been systematically studied. Trilayer thin films of 90 nm Fe - 20 at.% Cr (1^st layer)/100 nm Y₂O₃ (2^nd layer)/135 nm Fe - 20 at.% Cr (3^rd layer) were deposited on MgO substrates at 500 °C. After irradiation, Cr diffuses towards and enriches the FeCr/Y₂O₃ interface. Further, correlated with Cr redistributed into the oxide, an amorphous layer is generated at the interface. In the Y₂O₃ layer, the original cubic phase is observed to transform to the monoclinic phase after irradiation. Meanwhile, nanosized voids, with relatively larger size at interfaces, are also observed in the oxide layer. First-principles calculations reveal that Cr substitution of Y interstitials in Y₂O₃ containing excess Y interstitials is favored and the irradiation-induced monoclinic phase enhances this process. Lastly, our findings provide new insights that may aid in the development of irradiation resistant oxide-dispersed ferritic alloys.

Authors:

^[1]; Yadav, Satyesh Kumar ^[1]; Xu, Yun ^[2]; Aguiar, Jeffery ^[3];

^[1];

^[1]; Luo, Hongmei ^[2]; Misra, Amit ^[4];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
New Mexico State Univ., Las Cruces, NM (United States). Dept. of Chemical and Materials Engineering
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering

Publication Date:: 2017-01-16

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1352423

Report Number(s):: LA-UR-16-28998
Journal ID: ISSN 2045-2322

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Scientific Reports

Additional Journal Information:: Journal Volume: 7; Journal ID: ISSN 2045-2322

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats


                    Li, Nan, Yadav, Satyesh Kumar, Xu, Yun, Aguiar, Jeffery, Baldwin, Jon Kevin Scott, Wang, Yongqiang, Luo, Hongmei, Misra, Amit, and Uberuaga, Blas P. Cr incorporated phase transformation in Y2O3 under ion irradiation.  United States: N. p., 2017. 
Web.  doi:10.1038/srep40148.

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                    Li, Nan, Yadav, Satyesh Kumar, Xu, Yun, Aguiar, Jeffery, Baldwin, Jon Kevin Scott, Wang, Yongqiang, Luo, Hongmei, Misra, Amit, & Uberuaga, Blas P. Cr incorporated phase transformation in Y2O3 under ion irradiation.  United States.  https://doi.org/10.1038/srep40148

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                    Li, Nan, Yadav, Satyesh Kumar, Xu, Yun, Aguiar, Jeffery, Baldwin, Jon Kevin Scott, Wang, Yongqiang, Luo, Hongmei, Misra, Amit, and Uberuaga, Blas P. Mon .  
"Cr incorporated phase transformation in Y2O3 under ion irradiation".  United States.  https://doi.org/10.1038/srep40148.  https://www.osti.gov/servlets/purl/1352423.

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@article{osti_1352423,

  title        = {Cr incorporated phase transformation in Y2O3 under ion irradiation},

  author       = {Li, Nan and Yadav, Satyesh Kumar and Xu, Yun and Aguiar, Jeffery and Baldwin, Jon Kevin Scott and Wang, Yongqiang and Luo, Hongmei and Misra, Amit and Uberuaga, Blas P.},

  abstractNote = {Under irradiation, chemical species can redistribute in ways not expected from equilibrium behavior. In oxide-dispersed ferritic alloys, the phenomenon of irradiation-induced Cr redistribution at the metal/oxide interfaces has drawn recent attention. Here, the thermal and irradiation stability of the FeCr/Y2O3 interface has been systematically studied. Trilayer thin films of 90 nm Fe - 20 at.% Cr (1st layer)/100 nm Y2O3 (2nd layer)/135 nm Fe - 20 at.% Cr (3rd layer) were deposited on MgO substrates at 500 °C. After irradiation, Cr diffuses towards and enriches the FeCr/Y2O3 interface. Further, correlated with Cr redistributed into the oxide, an amorphous layer is generated at the interface. In the Y2O3 layer, the original cubic phase is observed to transform to the monoclinic phase after irradiation. Meanwhile, nanosized voids, with relatively larger size at interfaces, are also observed in the oxide layer. First-principles calculations reveal that Cr substitution of Y interstitials in Y2O3 containing excess Y interstitials is favored and the irradiation-induced monoclinic phase enhances this process. Lastly, our findings provide new insights that may aid in the development of irradiation resistant oxide-dispersed ferritic alloys.},

  doi          = {10.1038/srep40148},

  journal      = {Scientific Reports},

  number       = ,

  volume       = 7,

  place        = {United States},

  year         = {2017},

  month        = {1}

}

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Title: Cr incorporated phase transformation in Y2O3 under ion irradiation

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Title: Cr incorporated phase transformation in Y₂O₃ under ion irradiation