Crossover from disordered to core-shell structures of nano-oxide Y2O3 dispersed particles in Fe

M. P. Higgins; C. Y. Lu; Z. Lu; L. Shao; L. M. Wang; F. Gao

doi:10.1063/1.4959776

Crossover from disordered to core-shell structures of nano-oxide Y₂O₃ dispersed particles in Fe

M. P. Higgins
, C. Y. Lu
, Z. Lu
, L. Shao
, L. M. Wang
, F. Gao

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Molecular dynamic simulations of Y₂O₃ in bcc Fe and transmission electron microscopy (TEM) observations were used to understand the structure of Y₂O₃ nano-clusters in an oxide dispersion strengthened steel matrix. The study showed that Y₂O₃ nano-clusters below 2 nm were completely disordered. Y₂O₃ nano-clusters above 2 nm, however, form a core-shell structure, with a shell thickness of 0.5-0.7 nm that is independent of nano-cluster size. Y₂O₃ nano-clusters were surrounded by off-lattice Fe atoms, further increasing the stability of these nano-clusters. TEM was used to corroborate our simulation results and showed a crossover from a disordered nano-cluster to a core-shell structure.

Original language	English
Article number	031911
Journal	Applied Physics Letters
Volume	109
Issue number	3
DOIs	https://doi.org/10.1063/1.4959776
State	Published - 18 Jul 2016
Externally published	Yes

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title = "Crossover from disordered to core-shell structures of nano-oxide Y2O3 dispersed particles in Fe",

abstract = "Molecular dynamic simulations of Y2O3 in bcc Fe and transmission electron microscopy (TEM) observations were used to understand the structure of Y2O3 nano-clusters in an oxide dispersion strengthened steel matrix. The study showed that Y2O3 nano-clusters below 2 nm were completely disordered. Y2O3 nano-clusters above 2 nm, however, form a core-shell structure, with a shell thickness of 0.5-0.7 nm that is independent of nano-cluster size. Y2O3 nano-clusters were surrounded by off-lattice Fe atoms, further increasing the stability of these nano-clusters. TEM was used to corroborate our simulation results and showed a crossover from a disordered nano-cluster to a core-shell structure.",

author = "Higgins, \{M. P.\} and Lu, \{C. Y.\} and Z. Lu and L. Shao and Wang, \{L. M.\} and F. Gao",

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doi = "10.1063/1.4959776",

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TY - JOUR

T1 - Crossover from disordered to core-shell structures of nano-oxide Y2O3 dispersed particles in Fe

AU - Higgins, M. P.

AU - Lu, C. Y.

AU - Lu, Z.

AU - Shao, L.

AU - Wang, L. M.

AU - Gao, F.

PY - 2016/7/18

Y1 - 2016/7/18

N2 - Molecular dynamic simulations of Y2O3 in bcc Fe and transmission electron microscopy (TEM) observations were used to understand the structure of Y2O3 nano-clusters in an oxide dispersion strengthened steel matrix. The study showed that Y2O3 nano-clusters below 2 nm were completely disordered. Y2O3 nano-clusters above 2 nm, however, form a core-shell structure, with a shell thickness of 0.5-0.7 nm that is independent of nano-cluster size. Y2O3 nano-clusters were surrounded by off-lattice Fe atoms, further increasing the stability of these nano-clusters. TEM was used to corroborate our simulation results and showed a crossover from a disordered nano-cluster to a core-shell structure.

AB - Molecular dynamic simulations of Y2O3 in bcc Fe and transmission electron microscopy (TEM) observations were used to understand the structure of Y2O3 nano-clusters in an oxide dispersion strengthened steel matrix. The study showed that Y2O3 nano-clusters below 2 nm were completely disordered. Y2O3 nano-clusters above 2 nm, however, form a core-shell structure, with a shell thickness of 0.5-0.7 nm that is independent of nano-cluster size. Y2O3 nano-clusters were surrounded by off-lattice Fe atoms, further increasing the stability of these nano-clusters. TEM was used to corroborate our simulation results and showed a crossover from a disordered nano-cluster to a core-shell structure.

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U2 - 10.1063/1.4959776

DO - 10.1063/1.4959776

M3 - 文章

AN - SCOPUS:84979737342

SN - 0003-6951

VL - 109

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

M1 - 031911

ER -

Crossover from disordered to core-shell structures of nano-oxide Y₂O₃ dispersed particles in Fe

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